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

Improve transposition table remplacement strategy

Browse source 
Increase chance that PV node replaces old entry in transposition table.

STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.50>
Total: 46744 W: 12108 L: 11816 D: 22820
Ptnml(0-2): 156, 5221, 12344, 5477, 174
https://tests.stockfishchess.org/tests/view/61ae068356fcf33bce7d99d0

LTC:
LLR: 2.94 (-2.94,2.94) <0.50,3.00>
Total: 88464 W: 22912 L: 22513 D: 43039
Ptnml(0-2): 84, 9133, 25393, 9544, 78
https://tests.stockfishchess.org/tests/view/61ae973656fcf33bce7db3e1

closes https://github.com/official-stockfish/Stockfish/pull/3839

Bench: 5292488
This commit is contained in:
Stefan Geschwentner 2021-12-08 12:23:39 +01:00 • committed by Stéphane Nicolet
parent c228f3196a
commit 9451419912
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/tt.cpp
View file

@ -40,9 +40,9 @@ void TTEntry::save(Key k, Value v, bool pv, Bound b, Depth d, Move m, Value ev)
move16 = (uint16_t)m;
// Overwrite less valuable entries (cheapest checks first)
if (b == BOUND_EXACT
if ( b == BOUND_EXACT
|| (uint16_t)k != key16
|| d - DEPTH_OFFSET > depth8 - 4)
|| d - DEPTH_OFFSET + 2 * pv > depth8 - 4)
{
assert(d > DEPTH_OFFSET);
assert(d < 256 + DEPTH_OFFSET);