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Use Color-From-To history stats to help sort moves

Browse Source 
STC:
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 33502 W: 6498 L: 6223 D: 20781
http://tests.stockfishchess.org/tests/view/578abb940ebc5972faa169e2

LTC:
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 50782 W: 7124 L: 6832 D: 36826
http://tests.stockfishchess.org/tests/view/578b8e5d0ebc5972faa169fd

LTC: (Sanity test against latest master)
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 32759 W: 4600 L: 4370 D: 23789
http://tests.stockfishchess.org/tests/view/5798b7d30ebc591c761f5b72

bench: 6985912

P.S. Thanks @mstembera for rewriting my code to make it smp compatible. A BIG thank you!
This commit is contained in:
VoyagerOne
2016-07-25 09:53:18 -04:00
committed by Marco Costalba
parent 85924db496
commit b3525fa9ea
4 changed files with 36 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/search.cpp
+7 -2
View File
@@ -213,6 +213,7 @@ void Search::clear() {
{
th->history.clear();
th->counterMoves.clear();
th->fromTo.clear();
}
Threads.main()->previousScore = VALUE_INFINITE;
@@ -967,7 +968,8 @@ moves_loop: // When in check search starts from here
Value val = thisThread->history[moved_piece][to_sq(move)]
+ (cmh ? (*cmh )[moved_piece][to_sq(move)] : VALUE_ZERO)
+ (fmh ? (*fmh )[moved_piece][to_sq(move)] : VALUE_ZERO)
+ (fmh2 ? (*fmh2)[moved_piece][to_sq(move)] : VALUE_ZERO);
+ (fmh2 ? (*fmh2)[moved_piece][to_sq(move)] : VALUE_ZERO)
+ thisThread->fromTo.get(~pos.side_to_move(), move);
// Increase reduction for cut nodes
if (cutNode)
@@ -1395,7 +1397,8 @@ moves_loop: // When in check search starts from here
ss->killers[1] = ss->killers[0];
ss->killers[0] = move;
}
Color c = pos.side_to_move();
Value bonus = Value((depth / ONE_PLY) * (depth / ONE_PLY) + 2 * depth / ONE_PLY - 2);
Square prevSq = to_sq((ss-1)->currentMove);
@@ -1405,6 +1408,7 @@ moves_loop: // When in check search starts from here
Thread* thisThread = pos.this_thread();
thisThread->history.update(pos.moved_piece(move), to_sq(move), bonus);
thisThread->fromTo.update(c, move, bonus);
if (cmh)
{
@@ -1422,6 +1426,7 @@ moves_loop: // When in check search starts from here
for (int i = 0; i < quietsCnt; ++i)
{
thisThread->history.update(pos.moved_piece(quiets[i]), to_sq(quiets[i]), -bonus);
thisThread->fromTo.update(c, quiets[i], -bonus);
if (cmh)
cmh->update(pos.moved_piece(quiets[i]), to_sq(quiets[i]), -bonus);