Simplify probCutDepth term

daniel-monroe · vondele · commit 77d46ff61c3e · 2026-02-13T07:22:36.000+01:00
Passed STC LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 139392 W: 36003 L: 35897 D: 67492 Ptnml(0-2): 451, 16383, 35911, 16511, 440 https://tests.stockfishchess.org/tests/view/697ebb4d5f56030af97b5aa5 Passed LTC LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 266934 W: 67822 L: 67851 D: 131261 Ptnml(0-2): 175, 29579, 73955, 29616, 142 https://tests.stockfishchess.org/tests/view/6980e5a26362aee5c8a55398 closes official-stockfish#6607 Bench: 2515956
diff --git a/src/search.cpp b/src/search.cpp
@@ -943,7 +943,7 @@ Value Search::Worker::search(
         assert(probCutBeta < VALUE_INFINITE && probCutBeta > beta);
 
         MovePicker mp(pos, ttData.move, probCutBeta - ss->staticEval, &captureHistory);
-        Depth      probCutDepth = std::clamp(depth - 5 - (ss->staticEval - beta) / 315, 0, depth);
+        Depth      probCutDepth = depth - 5;
 
         while ((move = mp.next_move()) != Move::none())
         {

Original file line number	Diff line number	Diff line change
`@@ -943,7 +943,7 @@ Value Search::Worker::search(`
`943`	`943`	`assert(probCutBeta < VALUE_INFINITE && probCutBeta > beta);`
`944`	`944`
`945`	`945`	`MovePicker mp(pos, ttData.move, probCutBeta - ss->staticEval, &captureHistory);`
`946`		`- Depth probCutDepth = std::clamp(depth - 5 - (ss->staticEval - beta) / 315, 0, depth);`
	`946`	`+ Depth probCutDepth = depth - 5;`
`947`	`947`
`948`	`948`	`while ((move = mp.next_move()) != Move::none())`
`949`	`949`	`{`