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Rename same position rule to threefold repetition

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This commit is contained in:
Wuzzy 2023-07-18 02:41:23 +02:00
parent 5e2bd7f85e
commit 5cbcd833c5
1 changed files with 18 additions and 15 deletions
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33
src/chess.lua
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@ -1207,8 +1207,8 @@ local function letter_to_piece(letter)
end
-- Returns a list of all positions so far, for the purposes
-- of determining position equality under the "same position
-- repeated X times" draw rule.
-- of determining position equality under the
-- "3-/5-fold repetition" draw rules.
-- Each possible position is uniquely identified by a string
-- so equal positions have the same string and unequal positons
-- have a different string.
@ -1777,7 +1777,7 @@ local function update_formspec(meta)
-- Will trigger "draw claim" mode in which player must do the final move that triggers the draw
game_buttons = game_buttons .. "image_button[13.36,9.7;0.8,0.8;chess_draw_50move_next.png;draw_50_moves;]"..
"tooltip[draw_50_moves;"..
FS("Invoke the 50-move rule for the next move.").."\n"..
FS("Invoke the 50-move rule for your next move.").."\n"..
FS("If invoked and in the next turn, no piece is captured and no pawn is moved, the game will be drawn.").."]"
elseif halfmoveClock >= 100 then
-- When the 50 moves without capture / pawn move have occured occur.
@ -1788,7 +1788,7 @@ local function update_formspec(meta)
FS("(In the last 50 moves of each player, no pawn moved and no piece was captured.)").."]"
end
-- "same position has occured 3 times" rule
-- Threefold repetition rule
-- Count how often each position occurred
local positions, first_p = get_positions_history(meta)
local maxRepeatedPositions, lastOccurred = count_repeated_positions(positions, first_p)
@ -1797,14 +1797,14 @@ local function update_formspec(meta)
-- Will insta-draw.
game_buttons = game_buttons .. "image_button[12.36,9.7;0.8,0.8;chess_draw_repeat3.png;draw_repeat_3;]"..
"tooltip[draw_repeat_3;"..
FS("Invoke the 'same position' rule and draw the game.").."\n"..
FS("Invoke the threefold repetition rule and draw the game.").."\n"..
FS("(The same position has occured at least 3 times.)").."]"
elseif maxRepeatedPositions >= 2 then
-- If the same position is about to occur 3 times.
-- If the same position may be about to occur 3 times.
-- Will trigger "draw claim" mode in which player must do the final move that triggers the draw.
game_buttons = game_buttons .. "image_button[12.36,9.7;0.8,0.8;chess_draw_repeat3_next.png;draw_repeat_3;]"..
"tooltip[draw_repeat_3;"..
FS("Invoke the 'same position' rule in your next move.").."\n"..
FS("Invoke the threefold repetition rule for your next move.").."\n"..
FS("If invoked and the next move repeats a position for a 3rd time, the game will be drawn.").."]"
end
end
@ -1824,7 +1824,7 @@ local function update_formspec(meta)
s_draw_claim = "" ..
"image[12.36,9.7;0.8,0.8;chess_draw_repeat3_next.png]" ..
"tooltip[12.36,9.7;0.8,0.8;"..
FS("Draw claim active: Same position").."\n"..
FS("Draw claim active: Threefold repetition").."\n"..
FS("If the next move repeats the same position for a 3rd time, the game is drawn.").."]"
end
@ -2080,6 +2080,7 @@ local function update_game_result(meta)
end
end
-- fivefold repetition
if forceRepetitionDraw then
meta:set_string("gameResult", "draw")
meta:set_string("gameResultReason", "same_position_5")
@ -2087,6 +2088,8 @@ local function update_game_result(meta)
local msg = S("The exact same position has occured 5 times. It's a draw!")
send_message_2(playerWhite, playerBlack, msg, botColor)
minetest.log("action", "[xdecor] Chess: A game between "..playerWhite.." and "..playerBlack.." ended in a draw because the same position has appeared 5 times")
-- threefold repetition
elseif chosenRepetitionDraw and meta:get_string("drawClaim") == "same_position_3" then
meta:set_string("drawClaim", "")
meta:set_string("gameResult", "draw")
@ -2101,11 +2104,11 @@ local function update_game_result(meta)
claimer = playerBlack
other = playerWhite
end
send_message(claimer, S("You have drawn the game by invoking the 'same position' rule."), botColor)
send_message(claimer, S("You have drawn the game by invoking the threefold repetition rule."), botColor)
if claimer ~= other then
send_message(other, S("@1 has drawn the game by invoking the 'same position' rule.", claimer), botColor)
send_message(other, S("@1 has drawn the game by invoking the threefold repetition rule.", claimer), botColor)
end
minetest.log("action", "[xdecor] Chess: A game between "..playerWhite.." and "..playerBlack.." ended in a draw because "..claimer.." has invoked the 'same position' rule")
minetest.log("action", "[xdecor] Chess: A game between "..playerWhite.." and "..playerBlack.." ended in a draw because "..claimer.." has invoked the threefold repetition rule")
end
meta:set_string("drawClaim", "")
@ -2909,7 +2912,7 @@ function realchess.fields(pos, _, fields, sender)
return
end
-- Claim or declare draw via the same position rule (same position occured >= 3 times)
-- Claim or declare draw via the threefold repetition rule (same position occured >= 3 times)
if fields.draw_repeat_3 then
local botColor = meta:get_string("botColor")
local lastMove = meta:get_string("lastMove")
@ -2942,11 +2945,11 @@ function realchess.fields(pos, _, fields, sender)
meta:set_string("gameResultReason", "same_position_3")
add_special_to_moves_list(meta, "draw")
update_formspec(meta)
send_message(claimer, S("You have drawn the game by invoking the 'same position' rule."), botColor)
send_message(claimer, S("You have drawn the game by invoking the threefold repetition rule."), botColor)
if claimer ~= other then
send_message(other, S("@1 has drawn the game by invoking the 'same position' rule.", claimer), botColor)
send_message(other, S("@1 has drawn the game by invoking the threefold repetition rule.", claimer), botColor)
end
minetest.log("action", "[xdecor] Chess: A game between "..playerWhite.." and "..playerBlack.." ended in a draw because "..claimer.." has invoked the 'same position' rule")
minetest.log("action", "[xdecor] Chess: A game between "..playerWhite.." and "..playerBlack.." ended in a draw because "..claimer.." has invoked the threefold repetition rule")
elseif maxRepeatedPositions == 2 then
meta:set_string("drawClaim", "same_position_3")
update_formspec(meta)