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Tuned values for mid and end game passed pawns.

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STC :
LLR: 2.96 (-2.94,2.94) [0.00,4.00]
Total: 22691 W: 4468 L: 4228 D: 13995

LTC :
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 13620 W: 2216 L: 2023 D: 9381

Bench: 8384669

Resolves #391
This commit is contained in:
DiscanX 2015-08-10 01:25:41 +08:00 • committed by Gary Linscott
parent 1aae35b8b7
commit f4ace94f91
1 changed files with 13 additions and 2 deletions
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15
src/evaluate.cpp
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@ -146,6 +146,17 @@ namespace {
S(0, 0), S(0, 0), S(107, 138), S(84, 122), S(114, 203), S(121, 217)
};
// PassedPawnsBonusMg[Rank] and PassedPawnsBonusEg[Rank]
//contains bonuses for midgame and endgame for passed pawns according to
//the rank of the pawn.
const Value PassedPawnsBonusMg[6] = {
V(0), V(1), V(34), V(90), V(214), V(328)
};
const Value PassedPawnsBonusEg[6] = {
V(7), V(14), V(37), V(63), V(134), V(189)
};
const Score ThreatenedByHangingPawn = S(40, 60);
// Assorted bonuses and penalties used by evaluation
@ -567,8 +578,8 @@ namespace {
int r = relative_rank(Us, s) - RANK_2;
int rr = r * (r - 1);
// Base bonus based on rank
Value mbonus = Value(17 * rr), ebonus = Value(7 * (rr + r + 1));
Value mbonus = PassedPawnsBonusMg[r],
ebonus = PassedPawnsBonusEg[r];
if (rr)
{