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Allow full repetition detection

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Based on sshivaji 6ee19aa5389ce60181907ba53bbb50642f2d5657 commit
This commit is contained in:
Jean-Francois Romang
2012-10-23 20:33:45 +00:00
parent c1f4000426
commit 0587c5b605
3 changed files with 13 additions and 9 deletions
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src/search.cpp
+3 -3
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@@ -524,7 +524,7 @@ namespace {
if (!RootNode)
{
// Step 2. Check for aborted search and immediate draw
if (Signals.stop || pos.is_draw<false>() || ss->ply > MAX_PLY)
if (Signals.stop || pos.is_draw<false,true>() || ss->ply > MAX_PLY)
return DrawValue[pos.side_to_move()];
// Step 3. Mate distance pruning. Even if we mate at the next move our score
@@ -1103,7 +1103,7 @@ split_point_start: // At split points actual search starts from here
ss->ply = (ss-1)->ply + 1;
// Check for an instant draw or maximum ply reached
if (pos.is_draw<true>() || ss->ply > MAX_PLY)
if (pos.is_draw<true,true>() || ss->ply > MAX_PLY)
return DrawValue[pos.side_to_move()];
// Transposition table lookup. At PV nodes, we don't use the TT for
@@ -1552,7 +1552,7 @@ void RootMove::extract_pv_from_tt(Position& pos) {
&& pos.is_pseudo_legal(m)
&& pos.pl_move_is_legal(m, pos.pinned_pieces())
&& ply < MAX_PLY
&& (!pos.is_draw<false>() || ply < 2))
&& (!pos.is_draw<false,true>() || ply < 2))
{
pv.push_back(m);
pos.do_move(m, *st++);