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Bonus for checking moves

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STC:
LLR: 2.97 (-2.94,2.94) [0.00,5.00]
Total: 14531 W: 2765 L: 2576 D: 9190

LTC:
LLR: 3.20 (-2.94,2.94) [0.00,5.00]
Total: 52518 W: 8107 L: 7782 D: 36629

Bench: 7556477

Resolves #435
This commit is contained in:
Jonathan Calovski 2015-10-03 03:36:51 -07:00 • committed by Joona Kiiski
parent 3c0fe1d9b2
commit 9f5b31c21d
1 changed files with 13 additions and 0 deletions
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13
src/evaluate.cpp
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@ -184,6 +184,7 @@ namespace {
const Score Unstoppable = S( 0, 20); const Score Unstoppable = S( 0, 20);
const Score Hanging = S(31, 26); const Score Hanging = S(31, 26);
const Score PawnAttackThreat = S(20, 20); const Score PawnAttackThreat = S(20, 20);
const Score Checked = S(20, 20);
// Penalty for a bishop on a1/h1 (a8/h8 for black) which is trapped by // Penalty for a bishop on a1/h1 (a8/h8 for black) which is trapped by
// a friendly pawn on b2/g2 (b7/g7 for black). This can obviously only // a friendly pawn on b2/g2 (b7/g7 for black). This can obviously only
@ -440,22 +441,34 @@ namespace {
// Enemy queen safe checks // Enemy queen safe checks
b = (b1 | b2) & ei.attackedBy[Them][QUEEN]; b = (b1 | b2) & ei.attackedBy[Them][QUEEN];
if (b) if (b)
{
attackUnits += QueenCheck * popcount<Max15>(b); attackUnits += QueenCheck * popcount<Max15>(b);
score -= Checked;
}
// Enemy rooks safe checks // Enemy rooks safe checks
b = b1 & ei.attackedBy[Them][ROOK]; b = b1 & ei.attackedBy[Them][ROOK];
if (b) if (b)
{
attackUnits += RookCheck * popcount<Max15>(b); attackUnits += RookCheck * popcount<Max15>(b);
score -= Checked;
}
// Enemy bishops safe checks // Enemy bishops safe checks
b = b2 & ei.attackedBy[Them][BISHOP]; b = b2 & ei.attackedBy[Them][BISHOP];
if (b) if (b)
{
attackUnits += BishopCheck * popcount<Max15>(b); attackUnits += BishopCheck * popcount<Max15>(b);
score -= Checked;
}
// Enemy knights safe checks // Enemy knights safe checks
b = pos.attacks_from<KNIGHT>(ksq) & ei.attackedBy[Them][KNIGHT] & safe; b = pos.attacks_from<KNIGHT>(ksq) & ei.attackedBy[Them][KNIGHT] & safe;
if (b) if (b)
{
attackUnits += KnightCheck * popcount<Max15>(b); attackUnits += KnightCheck * popcount<Max15>(b);
score -= Checked;
}
// Finally, extract the king danger score from the KingDanger[] // Finally, extract the king danger score from the KingDanger[]
// array and subtract the score from evaluation. // array and subtract the score from evaluation.