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Simplify previous patch

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No functional change.
This commit is contained in:
Marco Costalba 2013-05-08 23:06:21 +02:00
parent 02606a8c83
commit 7eda7335fd
1 changed files with 10 additions and 21 deletions
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31
src/evaluate.cpp
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@ -899,30 +899,19 @@ Value do_evaluate(const Position& pos, Value& margin) {
else
unsafeSquares = squaresToQueen & (ei.attackedBy[Them][ALL_PIECES] | pos.pieces(Them));
// Default bonus for the empty square in front
int bonusMultiplier = 3;
// If there aren't enemy attacks huge bonus, a bit smaller if at
// least block square is not attacked, otherwise smallest bonus.
int k = !unsafeSquares ? 15 : !(unsafeSquares & blockSq) ? 9 : 3;
if ((defendedSquares & SquareBB[blockSq]) != 0)
{
// Defending the square in front
bonusMultiplier += 2;
if ((unsafeSquares & defendedSquares) == unsafeSquares)
// Defending all the attacked squares
// bigger bonus if we are defending everything
bonusMultiplier += (squaresToQueen == defendedSquares) ? 4 : 2;
}
// Big bonus if the path to queen is fully defended, a bit less
// if at least block square is defended.
if (defendedSquares == squaresToQueen)
k += 6;
if ((unsafeSquares & SquareBB[blockSq]) == 0)
{
// The square infront isn't attacked
bonusMultiplier += 6;
if (!unsafeSquares)
bonusMultiplier += 6;
}
else if (defendedSquares & blockSq)
k += (unsafeSquares & defendedSquares) == unsafeSquares ? 4 : 2;
Value bonus = Value(rr * bonusMultiplier);
ebonus += bonus;
mbonus += bonus;
mbonus += Value(k * rr), ebonus += Value(k * rr);
}
} // rr != 0