From 5ef2b8c4940bd2809bc1477c0ef0b0c38b19d5f7 Mon Sep 17 00:00:00 2001 From: Marco Costalba Date: Tue, 3 May 2011 09:54:22 +0200 Subject: [PATCH] Reintroduce permanent PV entries in TT We are now ready to release so restore this improvment before 2.1 Signed-off-by: Marco Costalba --- src/tt.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/tt.cpp b/src/tt.cpp index 14217e8d..86b16c85 100644 --- a/src/tt.cpp +++ b/src/tt.cpp @@ -107,7 +107,7 @@ void TranspositionTable::store(const Key posKey, Value v, ValueType t, Depth d, // Implement replace strategy c1 = (replace->generation() == generation ? 2 : 0); - c2 = (tte->generation() == generation ? -2 : 0); + c2 = (tte->generation() == generation || tte->type() == VALUE_TYPE_EXACT ? -2 : 0); c3 = (tte->depth() < replace->depth() ? 1 : 0); if (c1 + c2 + c3 > 0) -- 2.39.2