Simplify extensions depth increase condition

Passed STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 42784 W: 11198 L: 10979 D: 20607 Ptnml(0-2): 166, 5024, 10822, 5185, 195 https://tests.stockfishchess.org/tests/view/6795b6f8f6281b7d7b1869d6 Failed LTC: LLR: -2.95 (-2.94,2.94) <-1.75,0.25> Total: 283614 W: 72046 L: 72587 D: 138981 Ptnml(0-2): 241, 32097, 77647, 31606, 216 https://tests.stockfishchess.org/tests/view/6795cbb6f6281b7d7b186a07 Passed VLTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 59678 W: 15387 L: 15211 D: 29080 Ptnml(0-2): 23, 6169, 17273, 6357, 17 https://tests.stockfishchess.org/tests/view/6795c6dbf6281b7d7b1869f9 closes #5827 Bench: 3088494
official-stockfish · Feb 2, 2025 · 9f0844c · 9f0844c
1 parent 65a9a39
commit 9f0844c
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diff --git a/AUTHORS b/AUTHORS
@@ -125,6 +125,7 @@ jundery
 Justin Blanchard (UncombedCoconut)
 Kelly Wilson
 Ken Takusagawa
+Kenneth Lee (kennethlee33)
 Kian E (KJE-98)
 kinderchocolate
 Kiran Panditrao (Krgp)

diff --git a/src/search.cpp b/src/search.cpp
@@ -1107,7 +1107,7 @@ Value Search::Worker::search(
                     extension = 1 + (value < singularBeta - doubleMargin)
                               + (value < singularBeta - tripleMargin);
 
-                    depth += ((!PvNode) && (depth < 15));
+                    depth += (depth < 15);
                 }
 
                 // Multi-cut pruning