// Remaining depth: 1 ply 1.5 ply 2 ply 2.5 ply 3 ply 3.5 ply
const Value RazorApprMargins[6] = { Value(0x520), Value(0x300), Value(0x300), Value(0x300), Value(0x300), Value(0x300) };
- // The main transposition table
- TranspositionTable TT;
-
/// Variables initialized by UCI options
// Decide search depth for this move
bool moveIsCapture = pos.move_is_capture(move);
bool dangerous;
- ext = extension(pos, move, true, pos.move_is_capture(move), pos.move_is_check(move), false, false, &dangerous);
+ ext = extension(pos, move, true, moveIsCapture, pos.move_is_check(move), false, false, &dangerous);
newDepth = (Iteration - 2) * OnePly + ext + InitialDepth;
// Make the move, and search it
}
else
{
- if (newDepth >= 3*OnePly
- && i + MultiPV >= LMRPVMoves
+ if ( newDepth >= 3*OnePly
+ && i >= MultiPV + LMRPVMoves - 2 // Remove -2 and decrease LMRPVMoves instead ?
&& !dangerous
&& !moveIsCapture
&& !move_is_promotion(move)
{
ss[0].reduction = OnePly;
value = -search(pos, ss, -alpha, newDepth-OnePly, 1, true, 0);
- }
- else
+ } else
value = alpha + 1; // Just to trigger next condition
- if(value > alpha)
+
+ if (value > alpha)
{
value = -search(pos, ss, -alpha, newDepth, 1, true, 0);
if (value > alpha)
// Update PV
rml.set_move_score(i, value);
update_pv(ss, 0);
+ TT.extract_pv(pos, ss[0].pv);
rml.set_move_pv(i, ss[0].pv);
if (MultiPV == 1)
// Print search information to the standard output
std::cout << "info depth " << Iteration
<< " score " << value_to_string(value)
+ << ((value >= beta)?
+ " lowerbound" : ((value <= alpha)? " upperbound" : ""))
<< " time " << current_search_time()
<< " nodes " << nodes_searched()
<< " nps " << nps()
if (pos.type_of_piece_on(move_from(m)) == PAWN)
{
- if (pos.move_is_pawn_push_to_7th(m))
+ Color c = pos.side_to_move();
+ if (relative_rank(c, move_to(m)) == RANK_7)
{
result += PawnPushTo7thExtension[pvNode];
*dangerous = true;
}
- if (pos.move_is_passed_pawn_push(m))
+ if (pos.pawn_is_passed(c, move_to(m)))
{
result += PassedPawnExtension[pvNode];
*dangerous = true;
}
- // slowdown() simply wastes CPU cycles doing nothing useful. It's used
+ // slowdown() simply wastes CPU cycles doing nothing useful. It's used
// in strength handicap mode.
void slowdown(const Position &pos) {