From af703bae66a80394c74dbd1117f69d1f98d5e822 Mon Sep 17 00:00:00 2001
From: dhb <1084714805@qq.com>
Date: Fri, 14 Jun 2024 01:26:30 +0800
Subject: [PATCH] fix static eval init at root

test r15
---
 Rapfi/search/ab/searchstack.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Rapfi/search/ab/searchstack.h b/Rapfi/search/ab/searchstack.h
index 17a1b9fe..e36485b8 100644
--- a/Rapfi/search/ab/searchstack.h
+++ b/Rapfi/search/ab/searchstack.h
@@ -92,9 +92,13 @@ class StackArray : std::vector<SearchStack>
         reserve(maxPly + plyBeforeRoot + plyAfterMax);
         for (int i = -plyBeforeRoot; i < maxPly + plyAfterMax; i++)
             push_back(SearchStack {nextTriPvIndex(i), i});
+
         // Initialize static evaluation for plies before root
-        for (int i = 0; i <= plyBeforeRoot; i++)
-            (*this)[i].staticEval = initStaticEval;
+        Value staticEval = initStaticEval;
+        for (int i = plyBeforeRoot; i >= 0; i--) {
+            (*this)[i].staticEval = staticEval;
+            staticEval            = -staticEval;
+        }
     }
     SearchStack *rootStack() { return &(*this)[plyBeforeRoot]; }