Remove static eval threshold for extensions when giving check

linrock · vondele · commit ced0311890ad · 2023-06-04T23:05:28.000+02:00
Passed non-regression STC: https://tests.stockfishchess.org/tests/view/647685d54a36543c4c9f4f2a LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 114688 W: 30701 L: 30571 D: 53416 Ptnml(0-2): 336, 12708, 31136, 12818, 346 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/64774b02b81f005b572de770 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 107310 W: 28920 L: 28796 D: 49594 Ptnml(0-2): 33, 10427, 32621, 10531, 43 closes #4599 bench 2597974
diff --git a/src/search.cpp b/src/search.cpp
@@ -1085,7 +1085,8 @@ namespace {
           }
 
           // Check extensions (~1 Elo)
-          else if (   givesCheck && depth > 8)
+          else if (   givesCheck
+                   && depth > 9)
               extension = 1;
 
           // Quiet ttMove extensions (~1 Elo)

Original file line number	Diff line number	Diff line change
`@@ -1085,7 +1085,8 @@ namespace {`
`1085`	`1085`	`}`
`1086`	`1086`
`1087`	`1087`	`// Check extensions (~1 Elo)`
`1088`		`- else if ( givesCheck && depth > 8)`
	`1088`	`+ else if ( givesCheck`
	`1089`	`+ && depth > 9)`
`1089`	`1090`	`extension = 1;`
`1090`	`1091`
`1091`	`1092`	`// Quiet ttMove extensions (~1 Elo)`