Skip 5th continuation history

daniel-monroe · Disservin · commit 3d18ad719b2e · 2025-04-18T14:32:26.000+02:00
Passed simplification STC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 70208 W: 18098 L: 17914 D: 34196 Ptnml(0-2): 199, 8300, 17907, 8514, 184 https://tests.stockfishchess.org/tests/view/67ed889b31d7cf8afdc451cb Passed simplification LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 485004 W: 122703 L: 122956 D: 239345 Ptnml(0-2): 288, 53162, 135805, 53009, 238 https://tests.stockfishchess.org/tests/view/67ee810231d7cf8afdc452ea closes #5992 Bench: 1715901
diff --git a/src/search.cpp b/src/search.cpp
@@ -1917,7 +1917,7 @@ void update_all_stats(const Position&      pos,
 // at ply -1, -2, -3, -4, and -6 with current move.
 void update_continuation_histories(Stack* ss, Piece pc, Square to, int bonus) {
     static constexpr std::array<ConthistBonus, 6> conthist_bonuses = {
-      {{1, 1103}, {2, 659}, {3, 323}, {4, 533}, {5, 121}, {6, 474}}};
+      {{1, 1103}, {2, 659}, {3, 323}, {4, 533}, {6, 474}}};
 
     for (const auto [i, weight] : conthist_bonuses)
     {

Original file line number	Diff line number	Diff line change
`@@ -1917,7 +1917,7 @@ void update_all_stats(const Position& pos,`
`1917`	`1917`	`// at ply -1, -2, -3, -4, and -6 with current move.`
`1918`	`1918`	`void update_continuation_histories(Stack* ss, Piece pc, Square to, int bonus) {`
`1919`	`1919`	`static constexpr std::array<ConthistBonus, 6> conthist_bonuses = {`
`1920`		`- {{1, 1103}, {2, 659}, {3, 323}, {4, 533}, {5, 121}, {6, 474}}};`
	`1920`	`+ {{1, 1103}, {2, 659}, {3, 323}, {4, 533}, {6, 474}}};`
`1921`	`1921`
`1922`	`1922`	`for (const auto [i, weight] : conthist_bonuses)`
`1923`	`1923`	`{`