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Implement 75-moves rule

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Wuzzy 2023-07-16 14:55:25 +02:00
parent 3dbb283231
commit bccaf00e64
1 changed files with 18 additions and 2 deletions
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20
src/chess.lua
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@ -14,7 +14,7 @@ screwdriver = screwdriver or {}
local ENABLE_CHESS_GAMES = true
-- If true, will show some hidden state for debugging purposes
local CHESS_DEBUG = false
local CHESS_DEBUG = true
local function index_to_xy(idx)
if not idx then
@ -1442,7 +1442,7 @@ local function update_game_result(meta)
end
end
-- Is this a dead position
-- Is this a dead position?
if is_dead_position(board_t) then
meta:set_string("gameResult", "draw")
meta:set_string("gameResultReason", "dead_position")
@ -1453,6 +1453,22 @@ local function update_game_result(meta)
end
minetest.log("action", "[xdecor] Chess: A game between "..playerWhite.." and "..playerBlack.." ended in a draw by dead position")
end
-- 75-moves rule. Automatically draw game if the last 75 moves of EACH player (thus 150 halfmoves)
-- neither moved a pawn or captured a piece.
-- Important: This rule MUST be checked AFTER checkmate because checkmate takes precedence.
if meta:get_int("halfmoveClock") >= 150 then
meta:set_string("gameResult", "draw")
meta:set_string("gameResultReason", "75_moves_rule")
add_special_to_moves_list(meta, "draw")
local msg = S("No piece was captured and no pawn was moved for 75 consecutive moves of each player. It's a draw!")
minetest.chat_send_player(playerWhite, chat_prefix .. msg)
if playerWhite ~= playerBlack then
minetest.chat_send_player(playerBlack, chat_prefix .. msg)
end
minetest.log("action", "[xdecor] Chess: A game between "..playerWhite.." and "..playerBlack.." ended in a draw via the 75-move rule")
end
end