public void SameKillerMoveWithHigherScoreReplacesSlotEntry()
{
const int Ply = 10;
KillerMoves.Clear();
Piece piece = new Piece();
PiecePawn piecePawn = new PiecePawn(piece);
piece.Top = piecePawn;
Move move1 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(0), Board.GetSquare(1), null, 0, 20);
// Add a move
KillerMoves.RecordPossibleKillerMove(Ply, move1);
Assert.IsTrue(KillerMoves.RetrieveA(Ply) == move1);
Assert.IsTrue(KillerMoves.RetrieveA(Ply).Score == 20);
Assert.IsNull(KillerMoves.RetrieveB(Ply));
// Add same move AGAIN, but with higher score. Move should be replaced, using higher score.
Move move2 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(0), Board.GetSquare(1), null, 0, 30);
KillerMoves.RecordPossibleKillerMove(Ply, move2);
Assert.IsTrue(KillerMoves.RetrieveA(Ply) == move2);
Assert.IsTrue(KillerMoves.RetrieveA(Ply).Score == 30);
Assert.IsNull(KillerMoves.RetrieveB(Ply));
// Add same move AGAIN, but with LOWER score. No killer moves should be changed
Move move3 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(0), Board.GetSquare(1), null, 0, 10);
KillerMoves.RecordPossibleKillerMove(Ply, move3);
Assert.IsTrue(Move.MovesMatch(KillerMoves.RetrieveA(Ply), move2));
Assert.IsTrue(KillerMoves.RetrieveA(Ply).Score == 30);
Assert.IsNull(KillerMoves.RetrieveB(Ply));
// Now add a different move, and check it goes in slot B
Move move4 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(2), Board.GetSquare(3), null, 0, 5);
KillerMoves.RecordPossibleKillerMove(Ply, move4);
Assert.IsTrue(Move.MovesMatch(KillerMoves.RetrieveA(Ply), move3));
Assert.IsTrue(KillerMoves.RetrieveA(Ply).Score == 30);
Assert.IsTrue(Move.MovesMatch(KillerMoves.RetrieveB(Ply), move4));
Assert.IsTrue(KillerMoves.RetrieveB(Ply).Score == 5);
// Now improve score of the move that is in slot B.
// Slot B's score should be updated. Slot A should stay the same.
// Slot's A & B should be SWAPPED.
Move move5 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(2), Board.GetSquare(3), null, 0, 100);
KillerMoves.RecordPossibleKillerMove(Ply, move5);
Assert.IsTrue(Move.MovesMatch(KillerMoves.RetrieveA(Ply), move5));
Assert.IsTrue(KillerMoves.RetrieveA(Ply).Score == 100);
Assert.IsTrue(Move.MovesMatch(KillerMoves.RetrieveB(Ply), move3));
Assert.IsTrue(KillerMoves.RetrieveB(Ply).Score == 30);
}
public void RecordPossibleKillerMoveTest()
{
int Ply = 10;
KillerMoves.Clear();
Piece piece = new Piece();
PiecePawn piecePawn = new PiecePawn(piece);
piece.Top = piecePawn;
Move move1 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(0), Board.GetSquare(1), null, 0, 20);
KillerMoves.RecordPossibleKillerMove(Ply, move1);
Assert.IsTrue(KillerMoves.RetrieveA(Ply) == move1);
Assert.IsNull(KillerMoves.RetrieveB(Ply));
Move move2 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(2), Board.GetSquare(3), null, 0, 10);
KillerMoves.RecordPossibleKillerMove(Ply, move2);
Assert.IsTrue(KillerMoves.RetrieveA(Ply) == move1);
Assert.IsTrue(KillerMoves.RetrieveB(Ply) == move2);
Move move3 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(4), Board.GetSquare(5), null, 0, 15);
KillerMoves.RecordPossibleKillerMove(Ply, move3);
Assert.IsTrue(KillerMoves.RetrieveA(Ply) == move1);
Assert.IsTrue(KillerMoves.RetrieveB(Ply) == move3);
Move move4 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(6), Board.GetSquare(7), null, 0, 30);
KillerMoves.RecordPossibleKillerMove(Ply, move4);
Assert.IsTrue(KillerMoves.RetrieveA(Ply) == move4);
Assert.IsTrue(KillerMoves.RetrieveB(Ply) == move1);
// Start again
KillerMoves.Clear();
Move move5 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(16), Board.GetSquare(17), null, 0, 200);
KillerMoves.RecordPossibleKillerMove(Ply, move5);
Assert.IsTrue(KillerMoves.RetrieveA(Ply) == move5);
Assert.IsNull(KillerMoves.RetrieveB(Ply));
Move move6 = new Move(0, 0, Move.MoveNames.Standard, piece, Board.GetSquare(18), Board.GetSquare(19), null, 0, 300);
KillerMoves.RecordPossibleKillerMove(Ply, move6);
Assert.IsTrue(KillerMoves.RetrieveA(Ply) == move6);
Assert.IsTrue(KillerMoves.RetrieveB(Ply) == move5);
}