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Chess: Fix AI crash

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This commit is contained in:
Wuzzy 2023-07-12 11:37:09 +02:00
parent c99e2efe09
commit 00e5af5e34
1 changed files with 3 additions and 3 deletions
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6
src/chess.lua
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@ -534,7 +534,7 @@ local function best_move(moves)
end
if #choices == 0 then
return -1, -1
return nil
end
local random = math.random(1, #choices)
local choice_from, choice_to = choices[random].from, choices[random].to
@ -1587,7 +1587,7 @@ local function ai_move(inv, meta)
end
local choice_from, choice_to = best_move(moves)
if choice_from == -1 then
if choice_from == nil then
-- No best move: stalemate or checkmate
return
end
@ -1636,7 +1636,7 @@ local function ai_move(inv, meta)
local lastMoveTime = meta:get_int("lastMoveTime")
if lastMoveTime > 0 then
if not kingSafe then
if bestMoveSaveTo ~= -1 then
if bestMoveSaveTo ~= nil then
inv:set_stack("board", bestMoveSaveTo, board[bestMoveSaveFrom])
inv:set_stack("board", bestMoveSaveFrom, "")
meta:set_string("blackAttacked", "")