// History and stats update bonus, based on depth
int stat_bonus(Depth depth) {
- int d = depth / ONE_PLY ;
+ int d = depth / ONE_PLY;
return d > 17 ? 0 : d * d + 2 * d - 2;
}
MainThread* mainThread = (this == Threads.main() ? Threads.main() : nullptr);
std::memset(ss-4, 0, 7 * sizeof(Stack));
- for(int i = 4; i > 0; i--)
+ for (int i = 4; i > 0; i--)
(ss-i)->history = &this->counterMoveHistory[NO_PIECE][0]; // Use as sentinel
bestValue = delta = alpha = -VALUE_INFINITE;
&& abs(beta) < VALUE_MATE_IN_MAX_PLY)
{
Value rbeta = std::min(beta + 200, VALUE_INFINITE);
- Depth rdepth = depth - 4 * ONE_PLY;
- assert(rdepth >= ONE_PLY);
assert(is_ok((ss-1)->currentMove));
MovePicker mp(pos, ttMove, rbeta - ss->staticEval);
ss->currentMove = move;
ss->history = &thisThread->counterMoveHistory[pos.moved_piece(move)][to_sq(move)];
+ assert(depth >= 5 * ONE_PLY);
pos.do_move(move, st);
- value = -search<NonPV>(pos, ss+1, -rbeta, -rbeta+1, rdepth, !cutNode, false);
+ value = -search<NonPV>(pos, ss+1, -rbeta, -rbeta+1, depth - 4 * ONE_PLY, !cutNode, false);
pos.undo_move(move);
if (value >= rbeta)
return value;
{
assert(is_ok(move));
+ // Speculative prefetch as early as possible
+ prefetch(TT.first_entry(pos.key_after(move)));
+
givesCheck = type_of(move) == NORMAL && !pos.discovered_check_candidates()
? pos.check_squares(type_of(pos.piece_on(from_sq(move)))) & to_sq(move)
: pos.gives_check(move);
&& !pos.see_ge(move))
continue;
- // Speculative prefetch as early as possible
- prefetch(TT.first_entry(pos.key_after(move)));
-
// Check for legality just before making the move
if (!pos.legal(move))
{