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Bugfix: KRK was not classified as KNOWN_WIN

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Problem is that npMaterial is compared to _endgame_ value
of rook, although npMaterial is always (also in endgame!)
calculated using _middlegame_ values.

Bug was hidden as long as Rook middlegame
and endgame values were same.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Joona Kiiski 2009-06-17 11:07:16 +03:00 • committed by Marco Costalba
parent 8225fdd5bb
commit 46c0bdb74f
1 changed files with 2 additions and 2 deletions
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4
src/material.cpp
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@ -143,14 +143,14 @@ MaterialInfo* MaterialInfoTable::get_material_info(const Position& pos) {
else if ( pos.non_pawn_material(BLACK) == Value(0) else if ( pos.non_pawn_material(BLACK) == Value(0)
&& pos.piece_count(BLACK, PAWN) == 0 && pos.piece_count(BLACK, PAWN) == 0
&& pos.non_pawn_material(WHITE) >= RookValueEndgame) && pos.non_pawn_material(WHITE) >= RookValueMidgame)
{ {
mi->evaluationFunction = &EvaluateKXK; mi->evaluationFunction = &EvaluateKXK;
return mi; return mi;
} }
else if ( pos.non_pawn_material(WHITE) == Value(0) else if ( pos.non_pawn_material(WHITE) == Value(0)
&& pos.piece_count(WHITE, PAWN) == 0 && pos.piece_count(WHITE, PAWN) == 0
&& pos.non_pawn_material(BLACK) >= RookValueEndgame) && pos.non_pawn_material(BLACK) >= RookValueMidgame)
{ {
mi->evaluationFunction = &EvaluateKKX; mi->evaluationFunction = &EvaluateKKX;
return mi; return mi;