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Quiet move soft fail high bonus

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Extra bonus for quiet move creating a huge soft fail high (triggered
in 21% of quiet bestmoves on a normal bench run). Pb00067 original idea
using PawnValueMg.

Passed STC:
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 138207 W: 28060 L: 27295 D: 82852
http://tests.stockfishchess.org/tests/view/5b14471b0ebc5902a81689c1

Passe LTC:
LLR: 2.94 (-2.94,2.94) [0.00,5.00]
Total: 157289 W: 23200 L: 22518 D: 111571
http://tests.stockfishchess.org/tests/view/5b149dde0ebc5902a8b41c5a

bench: 4441320
This commit is contained in:
candirufish 2018-06-06 10:13:08 +02:00 • committed by Stéphane Nicolet
parent 231103d2cf
commit 528507b303
1 changed files with 2 additions and 1 deletions
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3
src/search.cpp
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@ -1164,7 +1164,8 @@ moves_loop: // When in check, search starts from here
{
// Quiet best move: update move sorting heuristics
if (!pos.capture_or_promotion(bestMove))
update_quiet_stats(pos, ss, bestMove, quietsSearched, quietCount, stat_bonus(depth));
update_quiet_stats(pos, ss, bestMove, quietsSearched, quietCount,
stat_bonus(depth + (bestValue > beta + PawnValueMg ? ONE_PLY : DEPTH_ZERO)));
else
update_capture_stats(pos, bestMove, capturesSearched, captureCount, stat_bonus(depth + ONE_PLY));