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Move with no figure is possible
Description
Sometimes when I run my agent, I got an error that on after checking if the move is a capture the moving figure doesnt match the figure names.
After further investiagation I found out that when my Quiesce function do recursivly moves without checking if the game is over, you can create a move with '--' as playing figure.
Code Changes:
With the addition in ChessEngine.py:800
if(self.pieceMoved == "--"): raise ValueError('moving a piece that is not on the board')
Error Output
I got the following console output:
Process Process-1:
Traceback (most recent call last):
File "C:\Python39\lib\multiprocessing\process.py", line 315, in _bootstrap
self.run()
File "C:\Python39\lib\multiprocessing\process.py", line 108, in run
self._target(*self._args, **self._kwargs)
File "C:\Projekte\chess_ai\student_agents\template.py", line 107, in findBestMove
score = self.alphaBeta(copyGS, self.currentDepth, -float('inf'), float('inf'), True)
File "C:\Projekte\chess_ai\student_agents\template.py", line 284, in alphaBeta
score = self.alphaBeta(copyGS, depth - 1, alpha, beta, False)
File "C:\Projekte\chess_ai\student_agents\template.py", line 319, in alphaBeta
score = self.alphaBeta(copyGS, depth - 1, alpha, beta, True)
File "C:\Projekte\chess_ai\student_agents\template.py", line 264, in alphaBeta
return self.Quiesce(gs,alpha,beta,depth)
File "C:\Projekte\chess_ai\student_agents\template.py", line 388, in Quiesce
score = -self.Quiesce(gs, -beta, -alpha ,depth)
File "C:\Projekte\chess_ai\student_agents\template.py", line 388, in Quiesce
score = -self.Quiesce(gs, -beta, -alpha ,depth)
File "C:\Projekte\chess_ai\student_agents\template.py", line 388, in Quiesce
score = -self.Quiesce(gs, -beta, -alpha ,depth)
[Previous line repeated 1 more time]
File "C:\Projekte\chess_ai\student_agents\template.py", line 384, in Quiesce
validMoves = gs.getValidMoves()
File "C:\Projekte\chess_ai\ChessEngine.py", line 300, in getValidMoves
self.getKingMoves(kingRow, kingCol, moves)
File "C:\Projekte\chess_ai\ChessEngine.py", line 688, in getKingMoves
moves.append(Move((r, c), (endRow, endCol), self.board))
File "C:\Projekte\chess_ai\ChessEngine.py", line 800, in __init__
raise ValueError('moving a piece that is not on the board')
ValueError: moving a piece that is not on the board
There you can see that when you execute gs.getValidMoves() on a Board without a king it returns a move where '--' is the moving Figure
BUG: getValidMoves generates IndexError
Description
Sometimes the function getKingsideCastleMoves get called with index=35 and with
getKingsideCastleMoves in ChessEngine:732
if self.board[rc + 1] == "--":
it ends in an IndexError
Error Output:
File "C:\Projekte\chess_ai\student_agents\template.py", line 313, in alphaBetaMin
validMoves = gs.getValidMoves()
File "C:\Projekte\chess_ai\ChessEngine.py", line 306, in getValidMoves
self.getCastleMoves(kingRow, kingCol, moves)
File "C:\Projekte\chess_ai\ChessEngine.py", line 708, in getCastleMoves
self.getKingsideCastleMoves(r, c, moves)
File "C:\Projekte\chess_ai\ChessEngine.py", line 732, in getKingsideCastleMoves
if self.board[rc + 1] == "--":
IndexError: list index out of range
No Checkmate detection on pawn promotion
Checkmates are not detected if they happen within a pawn promotion move.
Situation:
Board:
-- bK -- -- -- --
-- -- -- wR wp --
-- -- -- -- -- --
-- -- -- -- -- --
-- -- -- -- -- --
-- -- wK -- -- --
White's turn.
Valid moves: ['Ra5', 'Rd2', 'Rc5', 'Kc2', 'e6', 'Rd1', 'Kd2', 'Rb5', 'Rd4', 'Kb1', 'Kd1', 'Rd3', 'Kb2', 'Rd6']
White makes move: 'e6'
Board:
-- bK -- -- wR --
-- -- -- wR -- --
-- -- -- -- -- --
-- -- -- -- -- --
-- -- -- -- -- --
-- -- wK -- -- --
Expected Behaviour:
Pawn gets promoted to Rook. Black King is in Checkmate (gameState.checkMate evaluates to True)
Actual Behaviour:
Pawn gets promoted to Rook. Black King is not in Checkmate (gameState.checkMate evaluates to False)
Own night takes own rook [getValidMoves returns invalid move]
Description
I run my agent and suddenly I saw this:
On the right bottom corner was my rook and now my own knight is there. That alone is defently not a valid move.
Furthermore you can see the last position of my knight as red dot. So there is also an unvalid move from there as knight.
Maybe there are some bugs in the Castle Right moves...
You can test that behavior with that code:
Code
gs = GameState()
gs.board = ['bR', 'bB', 'bK', 'bN', '--', 'bR',
'bp', 'bp', '--', '--', '--', 'bp',
'--', '--', '--', 'bp', '--', 'wp',
'--', '--', '--', '--', '--', '--',
'bB', 'wp', 'wp', 'wp', '--', '--',
'wR', 'wB', 'wK', 'wN', '--', 'wR']
gs.whiteToMove = True
moves = gs.getValidMoves()
Get KeyError on undoMove()
Description
it dont happen very often but when it happen I cannot found any problem in my code.
I'm using undo move like this in my code
gs.makeMove(move)
score = RekursiveFunktion(x,y)
gs.undoMove()
Error Output
Process Process-6:
Traceback (most recent call last):
File "C:\Projekte\chess_ai\ChessEngine.py", line 177, in undoMove
self.game_log[tuple(self.board)] -= 1
KeyError: ('--', 'bR', 'bN', 'bK', 'bB', 'bR', '--', 'bp', 'bp', '--', 'bp', 'bp', '--', 'bB', '--', 'bp', '--', '--', '--', '--', '--', 'wp', 'wp', 'wp', 'wp', 'wp', 'wp', '--', '--', 'wR', 'wR', 'wB', 'wN', 'wK', '--', 'wR')
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