int searchTT = ttm;
ttMoves[0].move = ttm;
badCaptureThreshold = 0;
- lastBadCapture = badCaptures;
+ badCaptures = moves + MOVES_MAX;
pinned = p.pinned_pieces(pos.side_to_move());
if (p.is_check())
phasePtr = EvasionsPhaseTable;
- else if (d > Depth(0))
+ else if (d > DEPTH_ZERO)
{
// Consider sligtly negative captures as good if at low
// depth and far from beta.
- if (ss && ss->eval < beta - PawnValueMidgame && d < 3 * OnePly)
+ if (ss && ss->eval < beta - PawnValueMidgame && d < 3 * ONE_PLY)
badCaptureThreshold = -PawnValueMidgame;
phasePtr = MainSearchPhaseTable;
}
- else if (d == Depth(0))
+ else if (d == DEPTH_ZERO)
phasePtr = QsearchWithChecksPhaseTable;
else
{
return;
case PH_BAD_CAPTURES:
- // Bad captures SEE value is already calculated so just sort them
- // to get SEE move ordering.
+ // Bad captures SEE value is already calculated so just pick
+ // them in order to get SEE move ordering.
curMove = badCaptures;
- lastMove = lastBadCapture;
+ lastMove = moves + MOVES_MAX;
return;
case PH_EVASIONS:
assert(pos.is_check());
lastMove = generate_evasions(pos, moves);
- score_evasions_or_checks();
+ score_evasions();
return;
case PH_QCAPTURES:
case PH_QCHECKS:
lastMove = generate_non_capture_checks(pos, moves);
- score_evasions_or_checks();
return;
case PH_STOP:
Move m;
Piece piece;
Square from, to;
- int hs;
for (MoveStack* cur = moves; cur != lastMove; cur++)
{
from = move_from(m);
to = move_to(m);
piece = pos.piece_on(from);
- hs = H.move_ordering_score(piece, to);
-
- // Ensure history has always highest priority
- if (hs > 0)
- hs += 10000;
-
- // Gain table based scoring
- cur->score = hs + 16 * H.gain(piece, to);
+ cur->score = H.value(piece, to) + H.gain(piece, to);
}
}
-void MovePicker::score_evasions_or_checks() {
+void MovePicker::score_evasions() {
// Try good captures ordered by MVV/LVA, then non-captures if
// destination square is not under attack, ordered by history
// value, and at the end bad-captures and non-captures with a
cur->score = pos.midgame_value_of_piece_on(move_to(m))
- pos.type_of_piece_on(move_from(m)) + HistoryMax;
else
- cur->score = H.move_ordering_score(pos.piece_on(move_from(m)), move_to(m));
+ cur->score = H.value(pos.piece_on(move_from(m)), move_to(m));
}
}
if (seeValue >= badCaptureThreshold)
return move;
- // Losing capture, move it to the badCaptures[] array, note
+ // Losing capture, move it to the tail of the array, note
// that move has now been already checked for legality.
- assert(int(lastBadCapture - badCaptures) < 63);
- lastBadCapture->move = move;
- lastBadCapture->score = seeValue;
- lastBadCapture++;
+ (--badCaptures)->move = move;
+ badCaptures->score = seeValue;
}
break;