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Simplify unstoppable again (#950)

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Assign a small bonus for our passed pawns when the opponent has no
pieces left.

STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 51124 W: 9036 L: 8966 D: 33122

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 114560 W: 14604 L: 14604 D: 85352

Bench: 4940355
This commit is contained in:
Stéphane Nicolet 2017-01-02 09:33:40 +01:00 • committed by Marco Costalba
parent 1052ce74f6
commit e3a8b8bcff
1 changed files with 2 additions and 2 deletions
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4
src/evaluate.cpp
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@ -672,8 +672,8 @@ namespace {
mbonus += rr + r * 2, ebonus += rr + r * 2;
} // rr != 0
// Assign a small bonus when no pieces left (unstoppable)
if (!pos.non_pawn_material(Us) && !pos.non_pawn_material(Them))
// Assign a small bonus when the opponent has no pieces left
if (!pos.non_pawn_material(Them))
ebonus += 20;
score += make_score(mbonus, ebonus) + PassedFile[file_of(s)];