From a9cca5c953e6ccec865102b13b47b9f45d98a0fc Mon Sep 17 00:00:00 2001 From: VoyagerOne Date: Sun, 9 Jun 2019 18:26:47 -0400 Subject: [PATCH] No DC prune in QS (#2185) Don't prune discover checks in qSearch STC: LLR: 2.96 (-2.94,2.94) [0.50,4.50] Total: 23176 W: 5320 L: 5039 D: 12817 http://tests.stockfishchess.org/tests/view/5cfbc9350ebc5925cf094ab3 LTC: LLR: 2.95 (-2.94,2.94) [0.00,3.50] Total: 128428 W: 22222 L: 21679 D: 84527 http://tests.stockfishchess.org/tests/view/5cfbf0b70ebc5925cf094ebc Bench: 3883245 --- src/search.cpp | 1 + 1 file changed, 1 insertion(+) diff --git a/src/search.cpp b/src/search.cpp index 0e10f44f..50bce13c 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -1363,6 +1363,7 @@ moves_loop: // When in check, search starts from here // Don't search moves with negative SEE values if ( (!inCheck || evasionPrunable) + && (!givesCheck || !(pos.blockers_for_king(~pos.side_to_move()) & from_sq(move))) && !pos.see_ge(move)) continue; -- 2.39.2