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Don't update gamePly after each move

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We just need startup value to calculate available
thinking time. So remove from state.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-07-20 10:45:40 +02:00
parent 527a2ec541
commit 03ad183384
4 changed files with 16 additions and 18 deletions
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15
src/position.cpp
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@@ -190,11 +190,11 @@ void Position::from_fen(const string& fenStr, bool isChess960) {
}
// 5-6. Halfmove clock and fullmove number
fen >> std::skipws >> st->rule50 >> st->gamePly;
fen >> std::skipws >> st->rule50 >> startPosPly;
// Convert from fullmove starting from 1 to ply starting from 0,
// handle also common incorrect FEN with fullmove = 0.
st->gamePly = Max(2 * (st->gamePly - 1), 0) + int(sideToMove == BLACK);
startPosPly = Max(2 * (startPosPly - 1), 0) + int(sideToMove == BLACK);
// Various initialisations
chess960 = isChess960;
@@ -314,7 +314,7 @@ const string Position::to_fen() const {
fen << '-';
fen << (ep_square() == SQ_NONE ? " -" : " " + square_to_string(ep_square()))
<< " " << st->rule50 << " " << 1 + (st->gamePly - int(sideToMove == BLACK)) / 2;
<< " " << st->rule50 << " " << 1 + (startPosPly - int(sideToMove == BLACK)) / 2;
return fen.str();
}
@@ -786,10 +786,10 @@ void Position::do_move(Move m, StateInfo& newSt, const CheckInfo& ci, bool moveI
// pointer to point to the new, ready to be updated, state.
struct ReducedStateInfo {
Key pawnKey, materialKey;
int castleRights, rule50, gamePly, pliesFromNull;
Square epSquare;
Score value;
Value npMaterial[2];
int castleRights, rule50, pliesFromNull;
Score value;
Square epSquare;
};
memcpy(&newSt, st, sizeof(ReducedStateInfo));
@@ -803,7 +803,6 @@ void Position::do_move(Move m, StateInfo& newSt, const CheckInfo& ci, bool moveI
// Increment the 50 moves rule draw counter. Resetting it to zero in the
// case of non-reversible moves is taken care of later.
st->rule50++;
st->gamePly++;
st->pliesFromNull++;
if (move_is_castle(m))
@@ -1339,7 +1338,6 @@ void Position::do_null_move(StateInfo& backupSt) {
sideToMove = opposite_color(sideToMove);
st->epSquare = SQ_NONE;
st->rule50++;
st->gamePly++;
st->pliesFromNull = 0;
st->value += (sideToMove == WHITE) ? TempoValue : -TempoValue;
@@ -1364,7 +1362,6 @@ void Position::undo_null_move() {
// Update the necessary information
sideToMove = opposite_color(sideToMove);
st->rule50--;
st->gamePly--;
assert(is_ok());
}