From 141410f177c2514493f40d21a426490047cf97de Mon Sep 17 00:00:00 2001 From: Marco Costalba Date: Thu, 10 Feb 2011 21:09:20 +0100 Subject: [PATCH] Maximum aspiration delta of 24 After 9080 games 1430 - 1342 - 6308 ELO +3 (+- 2.9) Signed-off-by: Marco Costalba --- src/search.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/search.cpp b/src/search.cpp index 5196e862..fba9e535 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -657,7 +657,7 @@ namespace { int prevDelta1 = bestValues[iteration - 1] - bestValues[iteration - 2]; int prevDelta2 = bestValues[iteration - 2] - bestValues[iteration - 3]; - aspirationDelta = Min(Max(abs(prevDelta1) + abs(prevDelta2) / 2, 16), 64); + aspirationDelta = Min(Max(abs(prevDelta1) + abs(prevDelta2) / 2, 16), 24); aspirationDelta = (aspirationDelta + 7) / 8 * 8; // Round to match grainSize alpha = Max(bestValues[iteration - 1] - aspirationDelta, -VALUE_INFINITE); -- 2.39.2