In razor qsearch use corrected beta

Correct beta by razor margin when callin qsearch After 1019 games on Joona's QUAD Mod - Orig: 524 - 495 (+10 elo) Signed-off-by: Marco Costalba <mcostalba@gmail.com>
mcostalba · Nov 22, 2009 · 9898332 · 9898332
1 parent 8750712
commit 9898332
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/search.cpp b/src/search.cpp
@@ -1360,8 +1360,9 @@ namespace {
              && ttMove == MOVE_NONE
              && !pos.has_pawn_on_7th(pos.side_to_move()))
     {
-        Value v = qsearch(pos, ss, beta-1, beta, Depth(0), ply, threadID);
-        if (v < beta - RazorMargins[int(depth) - 2])
+        Value rbeta = beta - RazorMargins[int(depth) - 2];
+        Value v = qsearch(pos, ss, rbeta-1, rbeta, Depth(0), ply, threadID);
+        if (v < rbeta)
           return v;
     }