From c48d4cde08e33ae944ae527b6a3a691c7f7feccc Mon Sep 17 00:00:00 2001
From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Fri, 18 Jan 2013 17:02:17 +0100
Subject: [PATCH] Fix bug in PST initialization

The null table was not explicitly initialized, and was contaminated by
earlier initialization with another board size.
---
 hachu.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/hachu.c b/hachu.c
index 2af2697..ac3ed99 100644
--- a/hachu.c
+++ b/hachu.c
@@ -789,7 +789,8 @@ Init (int var)
 
   // piece-square tables
   for(i=0; i<BH; i++) for(j=0; j<BH; j++) {
-    int s = BW*i + j, d = BH*(BH-2) - (2*i - BH + 1)*(2*i - BH + 1) - (2*j - BH + 1)*(2*j - BH + 1);
+    int s = BW*i + j, d = BH*(BH-2) - abs(2*i - BH + 1)*(BH-1) - (2*j - BH + 1)*(2*j - BH + 1);
+    PST[s] = 0;
     PST[BH+s] = d/4 - (i == 0 || i == BH-1 ? 15 : 0) - (j == 0 || j == BH-1 ? 15 : 0);
     PST[BH*BW+s] = d/6;
     PST[BH*BW+BH+s] = d/12;
-- 
1.7.0.4