Simplify Double Margin Formula

FauziAkram · vondele · commit 73c55e894959 · 2025-05-25T21:31:12.000+02:00
Passed STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 267296 W: 69214 L: 69248 D: 128834 Ptnml(0-2): 760, 31511, 69141, 31475, 761 https://tests.stockfishchess.org/tests/view/682f5d9a6ec7634154f9b01e Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 67872 W: 17460 L: 17289 D: 33123 Ptnml(0-2): 25, 7238, 19243, 7401, 29 https://tests.stockfishchess.org/tests/view/6833074b6ec7634154f9b5ae Passed VLTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 118000 W: 30337 L: 30222 D: 57441 Ptnml(0-2): 15, 11783, 35289, 11898, 15 https://tests.stockfishchess.org/tests/view/683336c56ec7634154f9ba46 closes #6097 Bench: 2312696
diff --git a/src/search.cpp b/src/search.cpp
@@ -1147,7 +1147,7 @@ Value Search::Worker::search(
                 int corrValAdj2  = std::abs(correctionValue) / 249757;
                 int doubleMargin = -4 + 244 * PvNode - 206 * !ttCapture - corrValAdj1
                                  - 997 * ttMoveHistory / 131072
-                                 - (ss->ply * 2 > thisThread->rootDepth * 3) * 47;
+                                 - (ss->ply > thisThread->rootDepth) * 47;
                 int tripleMargin = 84 + 269 * PvNode - 253 * !ttCapture + 91 * ss->ttPv
                                  - corrValAdj2 - (ss->ply * 2 > thisThread->rootDepth * 3) * 54;
 
