From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Sat, 18 May 2019 08:04:38 +0000 (+0200)
Subject: Less LMR for losing chess variants
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=e662cf6b3226c04de7b5e3eb49dc3977af61a83d;p=fairystockfish.git

Less LMR for losing chess variants

giveaway STC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 555 W: 269 L: 176 D: 110
http://35.161.250.236:6543/tests/view/5cdfbcee6e23db34f4206af7

giveaway LTC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 1321 W: 557 L: 456 D: 308
http://35.161.250.236:6543/tests/view/5cdfd1a26e23db34f4206afc

losers STC
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 929 W: 484 L: 375 D: 70
http://35.161.250.236:6543/tests/view/5cdfbd0f6e23db34f4206afa

losers LTC
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 1153 W: 573 L: 463 D: 117
http://35.161.250.236:6543/tests/view/5cdfd1b06e23db34f4206afe
---

diff --git a/src/search.cpp b/src/search.cpp
index 598ac02..c34e380 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1040,9 +1040,10 @@ moves_loop: // When in check, search starts from here
       // re-searched at full depth.
       if (    depth >= 3 * ONE_PLY
           &&  moveCount > 1 + 3 * rootNode
-          && (  !(captureOrPromotion || (pos.must_capture() && MoveList<CAPTURES>(pos).size()))
+          && (  !captureOrPromotion
               || moveCountPruning
-              || ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha))
+              || ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha)
+          && !(pos.must_capture() && MoveList<CAPTURES>(pos).size()))
       {
           Depth r = reduction(improving, depth, moveCount);