Merge branch 'chess_ai'
This commit is contained in:
Jean-Patrick Guerrero
commit
ee7a28176b
689
src/chess.lua
689
src/chess.lua
@ -5,6 +5,7 @@ local function index_to_xy(idx)
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idx = idx - 1
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local x = idx % 8
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local y = (idx - x) / 8
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return x, y
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end
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@ -19,14 +20,6 @@ end
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local chat_prefix = minetest.colorize("#FFFF00", "[Chess] ")
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local letters = {'A','B','C','D','E','F','G','H'}
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local rowDirs = {-1, -1, -1, 0, 0, 1, 1, 1}
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local colDirs = {-1, 0, 1, -1, 1, -1, 0, 1}
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local bishopThreats = {true, false, true, false, false, true, false, true}
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local rookThreats = {false, true, false, true, true, false, true, false}
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local queenThreats = {true, true, true, true, true, true, true, true}
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local kingThreats = {true, true, true, true, true, true, true, true}
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local function board_to_table(inv)
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local t = {}
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for i = 1, 64 do
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@ -36,6 +29,431 @@ local function board_to_table(inv)
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return t
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end
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local piece_values = {
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pawn = 10,
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knight = 30,
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bishop = 30,
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rook = 50,
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queen = 90,
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king = 900
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}
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local function get_possible_moves(board, from_idx)
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local piece, color = board[from_idx]:match(":(%w+)_(%w+)")
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if not piece then return end
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local moves = {}
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local from_x, from_y = index_to_xy(from_idx)
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for i = 1, 64 do
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local stack_name = board[i]
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if stack_name:find((color == "black" and "white" or "black")) or
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stack_name == "" then
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moves[i] = 0
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end
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end
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for to_idx in pairs(moves) do
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local pieceTo = board[to_idx]
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local to_x, to_y = index_to_xy(to_idx)
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-- PAWN
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if piece == "pawn" then
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if color == "white" then
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local pawnWhiteMove = board[xy_to_index(from_x, from_y - 1)]
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-- white pawns can go up only
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if from_y - 1 == to_y then
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if from_x == to_x then
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if pieceTo ~= "" then
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moves[to_idx] = nil
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end
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elseif from_x - 1 == to_x or from_x + 1 == to_x then
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if not pieceTo:find("black") then
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moves[to_idx] = nil
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end
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else
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moves[to_idx] = nil
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end
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elseif from_y - 2 == to_y then
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if pieceTo ~= "" or from_y < 6 or pawnWhiteMove ~= "" then
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moves[to_idx] = nil
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end
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else
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moves[to_idx] = nil
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end
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--[[
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if x not changed
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ensure that destination cell is empty
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elseif x changed one unit left or right
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ensure the pawn is killing opponent piece
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else
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move is not legal - abort
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]]
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if from_x == to_x then
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if pieceTo ~= "" then
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moves[to_idx] = nil
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end
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elseif from_x - 1 == to_x or from_x + 1 == to_x then
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if not pieceTo:find("black") then
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moves[to_idx] = nil
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end
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else
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moves[to_idx] = nil
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end
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elseif color == "black" then
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local pawnBlackMove = board[xy_to_index(from_x, from_y + 1)]
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-- black pawns can go down only
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if from_y + 1 == to_y then
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if from_x == to_x then
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if pieceTo ~= "" then
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moves[to_idx] = nil
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end
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elseif from_x - 1 == to_x or from_x + 1 == to_x then
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if not pieceTo:find("white") then
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moves[to_idx] = nil
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end
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else
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moves[to_idx] = nil
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end
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elseif from_y + 2 == to_y then
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if pieceTo ~= "" or from_y > 1 or pawnBlackMove ~= "" then
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moves[to_idx] = nil
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end
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else
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moves[to_idx] = nil
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end
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--[[
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if x not changed
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ensure that destination cell is empty
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elseif x changed one unit left or right
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ensure the pawn is killing opponent piece
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else
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move is not legal - abort
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]]
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if from_x == to_x then
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if pieceTo ~= "" then
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moves[to_idx] = nil
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end
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elseif from_x - 1 == to_x or from_x + 1 == to_x then
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if not pieceTo:find("white") then
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moves[to_idx] = nil
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end
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else
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moves[to_idx] = nil
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end
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else
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moves[to_idx] = nil
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end
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-- ROOK
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elseif piece == "rook" then
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if from_x == to_x then
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-- Moving vertically
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if from_y < to_y then
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-- Moving down
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-- Ensure that no piece disturbs the way
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for i = from_y + 1, to_y - 1 do
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if board[xy_to_index(from_x, i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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else
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-- Mocing up
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-- Ensure that no piece disturbs the way
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for i = to_y + 1, from_y - 1 do
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if board[xy_to_index(from_x, i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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end
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elseif from_y == to_y then
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-- Mocing horizontally
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if from_x < to_x then
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-- mocing right
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-- ensure that no piece disturbs the way
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for i = from_x + 1, to_x - 1 do
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if board[xy_to_index(i, from_y)] ~= "" then
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moves[to_idx] = nil
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end
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end
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else
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-- Mocing left
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-- Ensure that no piece disturbs the way
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for i = to_x + 1, from_x - 1 do
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if board[xy_to_index(i, from_y)] ~= "" then
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moves[to_idx] = nil
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end
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end
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end
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else
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-- Attempt to move arbitrarily -> abort
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moves[to_idx] = nil
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end
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-- KNIGHT
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elseif piece == "knight" then
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-- Get relative pos
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local dx = from_x - to_x
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local dy = from_y - to_y
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-- Get absolute values
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if dx < 0 then
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dx = -dx
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end
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if dy < 0 then
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dy = -dy
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end
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-- Sort x and y
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if dx > dy then
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dx, dy = dy, dx
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end
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-- Ensure that dx == 1 and dy == 2
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if dx ~= 1 or dy ~= 2 then
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moves[to_idx] = nil
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end
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-- Just ensure that destination cell does not contain friend piece
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-- ^ It was done already thus everything ok
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-- BISHOP
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elseif piece == "bishop" then
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-- Get relative pos
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local dx = from_x - to_x
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local dy = from_y - to_y
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-- Get absolute values
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if dx < 0 then
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dx = -dx
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end
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if dy < 0 then
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dy = -dy
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end
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-- Ensure dx and dy are equal
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if dx ~= dy then
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moves[to_idx] = nil
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end
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if from_x < to_x then
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if from_y < to_y then
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-- Moving right-down
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-- Ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if board[xy_to_index(from_x + i, from_y + i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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else
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-- Moving right-up
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-- Ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if board[xy_to_index(from_x + i, from_y - i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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end
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else
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if from_y < to_y then
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-- Moving left-down
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-- Ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if board[xy_to_index(from_x - i, from_y + i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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else
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-- Moving left-up
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if board[xy_to_index(from_x - i, from_y - i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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end
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end
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-- QUEEN
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elseif piece == "queen" then
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local dx = from_x - to_x
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local dy = from_y - to_y
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-- Get absolute values
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if dx < 0 then
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dx = -dx
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end
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if dy < 0 then
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dy = -dy
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end
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-- Ensure valid relative move
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if dx ~= 0 and dy ~= 0 and dx ~= dy then
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moves[to_idx] = nil
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end
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if from_x == to_x then
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-- Moving vertically
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if from_y < to_y then
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-- Moving down
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-- Ensure that no piece disturbs the way
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for i = from_y + 1, to_y - 1 do
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if board[xy_to_index(from_x, i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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else
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-- Mocing up
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-- Ensure that no piece disturbs the way
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for i = to_y + 1, from_y - 1 do
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if board[xy_to_index(from_x, i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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end
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elseif from_x < to_x then
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if from_y == to_y then
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-- Goes right
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-- Ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if board[xy_to_index(from_x + i, from_y)] ~= "" then
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moves[to_idx] = nil
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end
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end
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elseif from_y < to_y then
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-- Goes right-down
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-- Ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if board[xy_to_index(from_x + i, from_y + i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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else
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-- Goes right-up
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-- Ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if board[xy_to_index(from_x + i, from_y - i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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end
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else
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if from_y == to_y then
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-- Mocing horizontally
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if from_x < to_x then
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-- mocing right
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-- ensure that no piece disturbs the way
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for i = from_x + 1, to_x - 1 do
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if board[xy_to_index(i, from_y)] ~= "" then
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moves[to_idx] = nil
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end
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end
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else
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-- Mocing left
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-- Ensure that no piece disturbs the way
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for i = to_x + 1, from_x - 1 do
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if board[xy_to_index(i, from_y)] ~= "" then
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moves[to_idx] = nil
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end
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end
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end
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elseif from_y < to_y then
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-- Goes left-down
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-- Ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if board[xy_to_index(from_x - i, from_y + i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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else
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-- Goes left-up
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-- Ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if board[xy_to_index(from_x - i, from_y - i)] ~= "" then
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moves[to_idx] = nil
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end
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end
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end
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end
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-- KING
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elseif piece == "king" then
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local dx = from_x - to_x
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local dy = from_y - to_y
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if dx < 0 then
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dx = -dx
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end
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if dy < 0 then
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dy = -dy
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end
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if dx > 1 or dy > 1 then
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moves[to_idx] = nil
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end
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end
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end
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if not next(moves) then return end
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for i in pairs(moves) do
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local stack_name = board[tonumber(i)]
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if stack_name ~= "" then
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for p, value in pairs(piece_values) do
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if stack_name:find(p) then
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moves[i] = value
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end
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end
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end
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end
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return moves
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end
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local function best_move(moves)
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local value, choices = 0, {}
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for from, _ in pairs(moves) do
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for to, val in pairs(_) do
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if val > value then
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value = val
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choices = {{
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from = from,
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to = to
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}}
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elseif val == value then
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choices[#choices + 1] = {
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from = from,
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to = to
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}
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end
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end
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end
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local random = math.random(1, #choices)
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local choice_from, choice_to = choices[random].from, choices[random].to
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return tonumber(choice_from), choice_to
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end
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local rowDirs = {-1, -1, -1, 0, 0, 1, 1, 1}
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local colDirs = {-1, 0, 1, -1, 1, -1, 0, 1}
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local rowDirsKnight = { 2, 1, 2, 1, -2, -1, -2, -1}
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local colDirsKnight = {-1, -2, 1, 2, 1, 2, -1, -2}
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local bishopThreats = {true, false, true, false, false, true, false, true}
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local rookThreats = {false, true, false, true, true, false, true, false}
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local queenThreats = {true, true, true, true, true, true, true, true}
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local kingThreats = {true, true, true, true, true, true, true, true}
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local function attacked(color, idx, board)
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local threatDetected = false
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local kill = color == "white"
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@ -78,6 +496,21 @@ local function attacked(color, idx, board)
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end
|
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end
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end
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local colK, rowK = index_to_xy(idx)
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colK, rowK = colK + 1, rowK + 1
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rowK = rowK + rowDirsKnight[dir]
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colK = colK + colDirsKnight[dir]
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|
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if rowK >= 1 and rowK <= 8 and colK >= 1 and colK <= 8 then
|
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local square = get_square(rowK, colK)
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local square_name = board[square]
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local piece, pieceColor = square_name:match(":(%w+)_(%w+)")
|
||||
|
||||
if piece and pieceColor ~= color and piece == "knight" then
|
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threatDetected = true
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||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
@ -147,6 +580,14 @@ for i = 1, #pieces do
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||||
end
|
||||
pieces_str = pieces_str .. "69=mailbox_blank16.png"
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||||
|
||||
local fs_init = [[
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size[4,1.2;]
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no_prepend[]
|
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label[0,0;Select a mode:]
|
||||
button[0,0.5;2,1;single;Singleplayer]
|
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button[2,0.5;2,1;multi;Multiplayer]
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]]
|
||||
|
||||
local fs = [[
|
||||
size[14.7,10;]
|
||||
no_prepend[]
|
||||
@ -159,7 +600,34 @@ local fs = [[
|
||||
]] .. "tablecolumns[image," .. pieces_str ..
|
||||
";text;color;text;color;text;image," .. pieces_str .. "]"
|
||||
|
||||
local function get_moves_list(meta, pieceFrom, pieceTo, pieceTo_s, from_x, to_x, from_y, to_y)
|
||||
local function update_formspec(meta)
|
||||
local black_king_attacked = meta:get_string("blackAttacked") == "true"
|
||||
local white_king_attacked = meta:get_string("whiteAttacked") == "true"
|
||||
|
||||
local playerWhite = meta:get_string("playerWhite")
|
||||
local playerBlack = meta:get_string("playerBlack")
|
||||
|
||||
local moves = meta:get_string("moves")
|
||||
local eaten_img = meta:get_string("eaten_img")
|
||||
local lastMove = meta:get_string("lastMove")
|
||||
local turnBlack = minetest.colorize("#000001", (lastMove == "white" and playerBlack ~= "") and
|
||||
playerBlack .. "..." or playerBlack)
|
||||
local turnWhite = minetest.colorize("#000001", (lastMove == "black" and playerWhite ~= "") and
|
||||
playerWhite .. "..." or playerWhite)
|
||||
local check_s = minetest.colorize("#FF0000", "\\[check\\]")
|
||||
|
||||
local formspec = fs ..
|
||||
"label[1.9,0.3;" .. turnBlack .. (black_king_attacked and " " .. check_s or "") .. "]" ..
|
||||
"label[1.9,9.15;" .. turnWhite .. (white_king_attacked and " " .. check_s or "") .. "]" ..
|
||||
"table[8.9,1.05;5.07,3.75;moves;" .. moves:sub(1,-2) .. ";1]" ..
|
||||
eaten_img
|
||||
|
||||
meta:set_string("formspec", formspec)
|
||||
end
|
||||
|
||||
local function get_moves_list(meta, pieceFrom, pieceTo, pieceTo_s, from_idx, to_idx)
|
||||
local from_x, from_y = index_to_xy(from_idx)
|
||||
local to_x, to_y = index_to_xy(to_idx)
|
||||
local moves = meta:get_string("moves")
|
||||
local pieceFrom_s = pieceFrom:match(":(%w+_%w+)")
|
||||
local pieceFrom_si_id = pieces_str:match("(%d+)=" .. pieceFrom_s)
|
||||
@ -202,7 +670,7 @@ local function get_eaten_list(meta, pieceTo, pieceTo_s)
|
||||
end
|
||||
|
||||
eaten_img = eaten_img ..
|
||||
"image[" .. ((X + (is_white and 11.7 or 8.8)) - (X * 0.45)) .. "," ..
|
||||
"image[" .. ((X + (is_white and 11.67 or 8.8)) - (X * 0.45)) .. "," ..
|
||||
((Y + 5.56) - (Y * 0.2)) .. ";1,1;" .. eaten_t[i] .. ".png]"
|
||||
end
|
||||
|
||||
@ -213,7 +681,7 @@ function realchess.init(pos)
|
||||
local meta = minetest.get_meta(pos)
|
||||
local inv = meta:get_inventory()
|
||||
|
||||
meta:set_string("formspec", fs)
|
||||
meta:set_string("formspec", fs_init)
|
||||
meta:set_string("infotext", "Chess Board")
|
||||
meta:set_string("playerBlack", "")
|
||||
meta:set_string("playerWhite", "")
|
||||
@ -229,6 +697,7 @@ function realchess.init(pos)
|
||||
|
||||
meta:set_string("moves", "")
|
||||
meta:set_string("eaten", "")
|
||||
meta:set_string("mode", "")
|
||||
|
||||
inv:set_list("board", pieces)
|
||||
inv:set_size("board", 64)
|
||||
@ -483,7 +952,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Moving right-down
|
||||
-- Ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -491,7 +961,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Moving right-up
|
||||
-- Ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -501,7 +972,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Moving left-down
|
||||
-- Ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -509,7 +981,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Moving left-up
|
||||
-- ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -535,7 +1008,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Goes down
|
||||
-- Ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x, from_y + i)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x, from_y + i)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -543,7 +1017,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Goes up
|
||||
-- Ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x, from_y - i)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x, from_y - i)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -553,7 +1028,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Goes right
|
||||
-- Ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x + i, from_y)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x + i, from_y)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -561,7 +1037,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Goes right-down
|
||||
-- Ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -569,7 +1046,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Goes right-up
|
||||
-- Ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -579,7 +1057,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Goes left
|
||||
-- Ensure that no piece disturbs the way and destination cell does
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x - i, from_y)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x - i, from_y)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -587,7 +1066,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Goes left-down
|
||||
-- Ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -595,7 +1075,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
-- Goes left-up
|
||||
-- Ensure that no piece disturbs the way
|
||||
for i = 1, dx - 1 do
|
||||
if inv:get_stack(from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then
|
||||
if inv:get_stack(
|
||||
from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then
|
||||
return 0
|
||||
end
|
||||
end
|
||||
@ -620,6 +1101,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
return 0
|
||||
end
|
||||
end
|
||||
|
||||
inv:set_stack(from_list, 57, "")
|
||||
inv:set_stack(from_list, 59, "realchess:rook_white_1")
|
||||
check = false
|
||||
@ -634,6 +1116,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
return 0
|
||||
end
|
||||
end
|
||||
|
||||
inv:set_stack(from_list, 62, "realchess:rook_white_2")
|
||||
inv:set_stack(from_list, 64, "")
|
||||
check = false
|
||||
@ -709,7 +1192,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
local whiteAttacked = attacked("white", white_king_idx, board)
|
||||
|
||||
if blackAttacked then
|
||||
if thisMove == "black" and meta:get_string("blackAttacked") == "true" then
|
||||
if thisMove == "black" then
|
||||
--[(*)[ and meta:get_string("blackAttacked") == "true" ]] then
|
||||
return 0
|
||||
else
|
||||
meta:set_string("blackAttacked", "true")
|
||||
@ -719,7 +1203,8 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
end
|
||||
|
||||
if whiteAttacked then
|
||||
if thisMove == "white" and meta:get_string("whiteAttacked") == "true" then
|
||||
if thisMove == "white" then
|
||||
--[(*)[ and meta:get_string("whiteAttacked") == "true" ]] then
|
||||
return 0
|
||||
else
|
||||
meta:set_string("whiteAttacked", "true")
|
||||
@ -728,47 +1213,139 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, _, player
|
||||
meta:set_string("whiteAttacked", "")
|
||||
end
|
||||
|
||||
lastMove = thisMove
|
||||
--(*) Allow a piece to move and put its king in check. Maybe not in the chess rules though?
|
||||
|
||||
lastMove = thisMove
|
||||
meta:set_string("lastMove", lastMove)
|
||||
meta:set_int("lastMoveTime", minetest.get_gametime())
|
||||
meta:set_string("playerWhite", playerWhite)
|
||||
meta:set_string("playerBlack", playerBlack)
|
||||
|
||||
if meta:get_string("playerWhite") == "" then
|
||||
meta:set_string("playerWhite", playerWhite)
|
||||
elseif meta:get_string("playerBlack") == "" then
|
||||
meta:set_string("playerBlack", playerBlack)
|
||||
end
|
||||
|
||||
local pieceTo_s = pieceTo ~= "" and pieceTo:match(":(%w+_%w+)") or ""
|
||||
get_moves_list(meta, pieceFrom, pieceTo, pieceTo_s, from_x, to_x, from_y, to_y)
|
||||
get_moves_list(meta, pieceFrom, pieceTo, pieceTo_s, from_index, to_index)
|
||||
get_eaten_list(meta, pieceTo, pieceTo_s)
|
||||
|
||||
return 1
|
||||
end
|
||||
|
||||
local function ai_move(inv, meta)
|
||||
local board_t = board_to_table(inv)
|
||||
local lastMove = meta:get_string("lastMove")
|
||||
|
||||
if lastMove == "white" then
|
||||
update_formspec(meta)
|
||||
local moves = {}
|
||||
|
||||
for i = 1, 64 do
|
||||
local possibleMoves = get_possible_moves(board_t, i)
|
||||
local stack_name = inv:get_stack("board", i):get_name()
|
||||
|
||||
if stack_name:find("black") then
|
||||
moves[tostring(i)] = possibleMoves
|
||||
end
|
||||
end
|
||||
|
||||
local choice_from, choice_to = best_move(moves)
|
||||
|
||||
local pieceFrom = inv:get_stack("board", choice_from):get_name()
|
||||
local pieceTo = inv:get_stack("board", choice_to):get_name()
|
||||
local pieceTo_s = pieceTo ~= "" and pieceTo:match(":(%w+_%w+)") or ""
|
||||
|
||||
local board = board_to_table(inv)
|
||||
local black_king_idx = locate_kings(board)
|
||||
local blackAttacked = attacked("black", black_king_idx, board)
|
||||
local kingSafe = true
|
||||
local bestMoveSaveFrom, bestMoveSaveTo
|
||||
|
||||
if blackAttacked then
|
||||
kingSafe = false
|
||||
meta:set_string("blackAttacked", "true")
|
||||
local save_moves = {}
|
||||
|
||||
for from_idx, _ in pairs(moves) do
|
||||
for to_idx, value in pairs(_) do
|
||||
from_idx = tonumber(from_idx)
|
||||
local from_idx_bak, to_idx_bak = board[from_idx], board[to_idx]
|
||||
board[to_idx] = board[from_idx]
|
||||
board[from_idx] = ""
|
||||
black_king_idx = locate_kings(board)
|
||||
|
||||
if black_king_idx then
|
||||
blackAttacked = attacked("black", black_king_idx, board)
|
||||
if not blackAttacked then
|
||||
save_moves[from_idx] = save_moves[from_idx] or {}
|
||||
save_moves[from_idx][to_idx] = value
|
||||
end
|
||||
end
|
||||
|
||||
board[from_idx], board[to_idx] = from_idx_bak, to_idx_bak
|
||||
end
|
||||
end
|
||||
|
||||
if next(save_moves) then
|
||||
bestMoveSaveFrom, bestMoveSaveTo = best_move(save_moves)
|
||||
end
|
||||
end
|
||||
|
||||
minetest.after(1.0, function()
|
||||
local lastMoveTime = meta:get_int("lastMoveTime")
|
||||
if lastMoveTime > 0 then
|
||||
if not kingSafe then
|
||||
if bestMoveSaveTo then
|
||||
inv:set_stack("board", bestMoveSaveTo, board[bestMoveSaveFrom])
|
||||
inv:set_stack("board", bestMoveSaveFrom, "")
|
||||
meta:set_string("blackAttacked", "")
|
||||
else
|
||||
return
|
||||
end
|
||||
else
|
||||
if pieceFrom:find("pawn") and choice_to >= 57 and choice_to <= 64 then
|
||||
inv:set_stack("board", choice_to, "realchess:queen_black")
|
||||
else
|
||||
inv:set_stack("board", choice_to, pieceFrom)
|
||||
end
|
||||
|
||||
inv:set_stack("board", choice_from, "")
|
||||
end
|
||||
|
||||
board = board_to_table(inv)
|
||||
local _, white_king_idx = locate_kings(board)
|
||||
local whiteAttacked = attacked("white", white_king_idx, board)
|
||||
|
||||
if whiteAttacked then
|
||||
meta:set_string("whiteAttacked", "true")
|
||||
end
|
||||
|
||||
if meta:get_string("playerBlack") == "" then
|
||||
meta:set_string("playerBlack", "Dumb AI")
|
||||
end
|
||||
|
||||
meta:set_string("lastMove", "black")
|
||||
meta:set_int("lastMoveTime", minetest.get_gametime())
|
||||
|
||||
get_moves_list(meta, pieceFrom, pieceTo, pieceTo_s, choice_from, choice_to)
|
||||
get_eaten_list(meta, pieceTo, pieceTo_s)
|
||||
|
||||
update_formspec(meta)
|
||||
end
|
||||
end)
|
||||
else
|
||||
update_formspec(meta)
|
||||
end
|
||||
end
|
||||
|
||||
function realchess.on_move(pos, from_list, from_index)
|
||||
local meta = minetest.get_meta(pos)
|
||||
local inv = meta:get_inventory()
|
||||
inv:set_stack(from_list, from_index, '')
|
||||
inv:set_stack(from_list, from_index, "")
|
||||
|
||||
local black_king_attacked = meta:get_string("blackAttacked") == "true"
|
||||
local white_king_attacked = meta:get_string("whiteAttacked") == "true"
|
||||
|
||||
local playerWhite = meta:get_string("playerWhite")
|
||||
local playerBlack = meta:get_string("playerBlack")
|
||||
|
||||
local moves = meta:get_string("moves")
|
||||
local eaten_img = meta:get_string("eaten_img")
|
||||
local lastMove = meta:get_string("lastMove")
|
||||
local turnBlack = minetest.colorize("#000001", (lastMove == "white" and playerBlack ~= "") and
|
||||
playerBlack .. "..." or playerBlack)
|
||||
local turnWhite = minetest.colorize("#000001", (lastMove == "black" and playerWhite ~= "") and
|
||||
playerWhite .. "..." or playerWhite)
|
||||
local check_s = minetest.colorize("#FF0000", "\\[check\\]")
|
||||
|
||||
local formspec = fs ..
|
||||
"label[1.9,0.3;" .. turnBlack .. (black_king_attacked and " " .. check_s or "") .. "]" ..
|
||||
"label[1.9,9.15;" .. turnWhite .. (white_king_attacked and " " .. check_s or "") .. "]" ..
|
||||
"table[8.9,1.05;5.07,3.75;moves;" .. moves:sub(1,-2) .. ";1]" ..
|
||||
eaten_img
|
||||
|
||||
meta:set_string("formspec", formspec)
|
||||
if meta:get_string("mode") == "single" then
|
||||
ai_move(inv, meta)
|
||||
end
|
||||
|
||||
return false
|
||||
end
|
||||
@ -794,12 +1371,18 @@ function realchess.fields(pos, _, fields, sender)
|
||||
local lastMoveTime = meta:get_int("lastMoveTime")
|
||||
if fields.quit then return end
|
||||
|
||||
if fields.single or fields.multi then
|
||||
meta:set_string("mode", (fields.single and "single" or "multi"))
|
||||
update_formspec(meta)
|
||||
return
|
||||
end
|
||||
|
||||
-- Timeout is 5 min. by default for resetting the game (non-players only)
|
||||
if fields.new then
|
||||
if (playerWhite == playerName or playerBlack == playerName) then
|
||||
realchess.init(pos)
|
||||
|
||||
elseif lastMoveTime ~= 0 then
|
||||
elseif lastMoveTime > 0 then
|
||||
if minetest.get_gametime() >= timeout_limit and
|
||||
(playerWhite ~= playerName or playerBlack ~= playerName) then
|
||||
realchess.init(pos)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user