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Entering a pawn endgame is no more dangerous

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A simplification of the 'dangerous' definition.

Seems neutral at reverse test at long TC

master vs patch
LLR: -2.96 (-2.94,2.94)
Total: 16974 W: 3122 L: 3139 D: 10713

bench: 4689029
This commit is contained in:
Marco Costalba 2013-07-02 07:24:17 +02:00
parent b8930d0c26
commit 2d82db1d14
1 changed files with 1 additions and 6 deletions
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7
src/search.cpp
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@ -820,12 +820,7 @@ split_point_start: // At split points actual search starts from here
givesCheck = pos.move_gives_check(move, ci); givesCheck = pos.move_gives_check(move, ci);
dangerous = givesCheck dangerous = givesCheck
|| pos.is_passed_pawn_push(move) || pos.is_passed_pawn_push(move)
|| type_of(move) == CASTLE || type_of(move) == CASTLE;
|| ( captureOrPromotion // Entering a pawn endgame?
&& type_of(pos.piece_on(to_sq(move))) != PAWN
&& type_of(move) == NORMAL
&& ( pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK)
- PieceValue[MG][pos.piece_on(to_sq(move))] == VALUE_ZERO));
// Step 12. Extend checks and, in PV nodes, also dangerous moves // Step 12. Extend checks and, in PV nodes, also dangerous moves
if (PvNode && dangerous) if (PvNode && dangerous)