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Change NO_PIECE value and shrink PieceValue[]

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This requires changing color_of() definition.

No functional change.
This commit is contained in:
Marco Costalba
2012-10-21 11:49:05 +02:00
parent e304db9d1e
commit e40b06a050
4 changed files with 24 additions and 25 deletions
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8
src/search.cpp
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@@ -802,7 +802,7 @@ split_point_start: // At split points actual search starts from here
&& 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));
- PieceValue[MG][pos.piece_on(to_sq(move))] == VALUE_ZERO));
// Step 12. Extend checks and, in PV nodes, also dangerous moves
if (PvNode && dangerous)
@@ -1184,7 +1184,7 @@ split_point_start: // At split points actual search starts from here
&& !pos.is_passed_pawn_push(move))
{
futilityValue = futilityBase
+ PieceValue[Eg][pos.piece_on(to_sq(move))]
+ PieceValue[EG][pos.piece_on(to_sq(move))]
+ (type_of(move) == ENPASSANT ? PawnValueEg : VALUE_ZERO);
if (futilityValue < beta)
@@ -1315,7 +1315,7 @@ split_point_start: // At split points actual search starts from here
while (b)
{
// Note that here we generate illegal "double move"!
if (futilityBase + PieceValue[Eg][pos.piece_on(pop_lsb(&b))] >= beta)
if (futilityBase + PieceValue[EG][pos.piece_on(pop_lsb(&b))] >= beta)
return true;
}
@@ -1420,7 +1420,7 @@ split_point_start: // At split points actual search starts from here
// Case 2: If the threatened piece has value less than or equal to the
// value of the threatening piece, don't prune moves which defend it.
if ( pos.is_capture(threat)
&& ( PieceValue[Mg][pos.piece_on(tfrom)] >= PieceValue[Mg][pos.piece_on(tto)]
&& ( PieceValue[MG][pos.piece_on(tfrom)] >= PieceValue[MG][pos.piece_on(tto)]
|| type_of(pos.piece_on(tfrom)) == KING)
&& pos.move_attacks_square(m, tto))
return true;