kate/BadFish
1
0
Fork 0
mirror of https://github.com/sockspls/badfish synced 2025-04-30 16:53:09 +00:00
Code Issues Releases Wiki Activity

Remove formerPV variable.

Browse source 
STC:
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 75672 W: 6546 L: 6496 D: 62630
Ptnml(0-2): 238, 5274, 26761, 5326, 237
https://tests.stockfishchess.org/tests/view/60b349c0ec0c03148cbed055

LTC:
LLR: 2.98 (-2.94,2.94) <-2.50,0.50>
Total: 137816 W: 4676 L: 4689 D: 128451
Ptnml(0-2): 52, 4237, 60354, 4202, 63
https://tests.stockfishchess.org/tests/view/60b38970ec0c03148cbed075

closes https://github.com/official-stockfish/Stockfish/pull/3515

Bench: 4892288
This commit is contained in:
Stefan Geschwentner 2021-05-31 20:26:05 +02:00 • committed by Stéphane Nicolet
parent 9fd5b44d60
commit 95f73ff393
1 changed files with 4 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
src/search.cpp
View file

@ -564,7 +564,7 @@ namespace {
Move ttMove, move, excludedMove, bestMove; Move ttMove, move, excludedMove, bestMove;
Depth extension, newDepth; Depth extension, newDepth;
Value bestValue, value, ttValue, eval, maxValue, probCutBeta; Value bestValue, value, ttValue, eval, maxValue, probCutBeta;
bool formerPv, givesCheck, improving, didLMR, priorCapture; bool givesCheck, improving, didLMR, priorCapture;
bool captureOrPromotion, doFullDepthSearch, moveCountPruning, bool captureOrPromotion, doFullDepthSearch, moveCountPruning,
ttCapture, singularQuietLMR; ttCapture, singularQuietLMR;
Piece movedPiece; Piece movedPiece;
@ -634,7 +634,6 @@ namespace {
: ss->ttHit ? tte->move() : MOVE_NONE; : ss->ttHit ? tte->move() : MOVE_NONE;
if (!excludedMove) if (!excludedMove)
ss->ttPv = PvNode || (ss->ttHit && tte->is_pv()); ss->ttPv = PvNode || (ss->ttHit && tte->is_pv());
formerPv = ss->ttPv && !PvNode;
// Update low ply history for previous move if we are near root and position is or has been in PV // Update low ply history for previous move if we are near root and position is or has been in PV
if ( ss->ttPv if ( ss->ttPv
@ -1064,8 +1063,8 @@ moves_loop: // When in check, search starts from here
&& (tte->bound() & BOUND_LOWER) && (tte->bound() & BOUND_LOWER)
&& tte->depth() >= depth - 3) && tte->depth() >= depth - 3)
{ {
Value singularBeta = ttValue - ((formerPv + 4) * depth) / 2; Value singularBeta = ttValue - 2 * depth;
Depth singularDepth = (depth - 1 + 3 * formerPv) / 2; Depth singularDepth = (depth - 1) / 2;
ss->excludedMove = move; ss->excludedMove = move;
value = search<NonPV>(pos, ss, singularBeta - 1, singularBeta, singularDepth, cutNode); value = search<NonPV>(pos, ss, singularBeta - 1, singularBeta, singularDepth, cutNode);
@ -1128,7 +1127,7 @@ moves_loop: // When in check, search starts from here
&& moveCount > 1 + 2 * rootNode && moveCount > 1 + 2 * rootNode
&& ( !captureOrPromotion && ( !captureOrPromotion
|| (cutNode && (ss-1)->moveCount > 1) || (cutNode && (ss-1)->moveCount > 1)
|| (!PvNode && !formerPv)) || !ss->ttPv)
&& (!PvNode || ss->ply > 1 || thisThread->id() % 4 != 3)) && (!PvNode || ss->ply > 1 || thisThread->id() % 4 != 3))
{ {
Depth r = reduction(improving, depth, moveCount); Depth r = reduction(improving, depth, moveCount);