From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Tue, 26 Jan 2021 07:57:47 +0000 (+0100)
Subject: Tweak NMP for atomic
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=4162dc68d9257d07d59ba6a32da9e7e06dc51e0e;p=fairystockfish.git

Tweak NMP for atomic

atomic STC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 1896 W: 747 L: 641 D: 508
http://www.variantfishtest.org:6543/tests/view/600d9fe46e23db077dd66209

atomic LTC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 1793 W: 659 L: 558 D: 576
http://www.variantfishtest.org:6543/tests/view/600f454c6e23db077dd66213
---

diff --git a/src/search.cpp b/src/search.cpp
index ed725fe..1573f7c 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -943,7 +943,7 @@ namespace {
         assert(eval - beta >= 0);
 
         // Null move dynamic reduction based on depth and value
-        Depth R = (1015 - 300 * pos.must_capture() - 250 * !pos.checking_permitted() + 85 * depth) / 256 + std::min(int(eval - beta) / (191 + 200 * pos.must_capture()), 3);
+        Depth R = (1015 - 300 * pos.must_capture() - 250 * !pos.checking_permitted() + 85 * depth) / 256 + std::min(int(eval - beta) / (191 + 200 * pos.must_capture() + 200 * pos.blast_on_capture()), 3);
 
         ss->currentMove = MOVE_NULL;
         ss->continuationHistory = &thisThread->continuationHistory[0][0][NO_PIECE][0];