when the best move does not change frequently
STC:
LLR: 2.94 (-2.94,2.94) {-0.25,1.25}
Total: 51320 W: 5159 L: 4956 D: 41205
Ptnml(0-2): 215, 3897, 17242, 4082, 224
https://tests.stockfishchess.org/tests/view/
5faa072367cbf42301d6a767
LTC:
LLR: 2.98 (-2.94,2.94) {0.25,1.25}
Total: 15952 W: 762 L: 642 D: 14548
Ptnml(0-2): 8, 561, 6725, 667, 15
https://tests.stockfishchess.org/tests/view/
5faa4c3567cbf42301d6a794
closes https://github.com/official-stockfish/Stockfish/pull/3225
Bench:
3954692
Jerry Donald Watson (jerrydonaldwatson)
jjoshua2
Jonathan Calovski (Mysseno)
-Jonathan Dumale (SFisGOD)
+Jonathan Buladas Dumale (SFisGOD)
Joost VandeVondele (vondele)
Jörg Oster (joergoster)
Joseph Ellis (jhellis3)
if (thisThread->ttHitAverage > 509 * TtHitAverageResolution * TtHitAverageWindow / 1024)
r--;
- // Reduction if other threads are searching this position
+ // Increase reduction if other threads are searching this position
if (th.marked())
r++;
if (ss->ttPv)
r -= 2;
- if (!PvNode && depth > 10 && thisThread->bestMoveChanges <= 2)
+ // Increase reduction at root and non-PV nodes when the best move does not change frequently
+ if ((rootNode || !PvNode) && depth > 10 && thisThread->bestMoveChanges <= 2)
r++;
if (moveCountPruning && !formerPv)