From: Marco Costalba <mcostalba@gmail.com>
Date: Mon, 31 May 2010 17:32:00 +0000 (+0100)
Subject: Fix SearchStack and ply misalignment in RootMoveList
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=ee8ccac622227f3b5184e294ffa3d2766bf4b600

Fix SearchStack and ply misalignment in RootMoveList

In RootMoveList c'tor we call qsearch() with
ply == 1 but SearchStack at 0.

We never noticed before because in qsearch we don't access
previous's ply SearchStack, otherwise we would have got
a nice crash ;-)

This bug is a fall down of previous patch.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---

diff --git a/src/search.cpp b/src/search.cpp
index 0ac1f364..739cce0b 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -2787,7 +2787,7 @@ namespace {
         init_ss_array(ss);
         pos.do_move(cur->move, st);
         moves[count].move = cur->move;
-        moves[count].score = -qsearch<PV>(pos, ss, -VALUE_INFINITE, VALUE_INFINITE, Depth(0), 1, 0);
+        moves[count].score = -qsearch<PV>(pos, ss+1, -VALUE_INFINITE, VALUE_INFINITE, Depth(0), 1, 0);
         moves[count].pv[0] = cur->move;
         moves[count].pv[1] = MOVE_NONE;
         pos.undo_move(cur->move);