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Slow down reductions

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After testing on Joona QUAD the whole LMR series:

Orig - Mod: 335 - 405 (+33 elo)

Functionality Signature: 12581900

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Joona Kiiski
2010-01-04 18:41:24 +02:00
committed by Marco Costalba
parent 49b1c5dccd
commit e2e360fcbc
1 changed files with 5 additions and 5 deletions
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src/search.cpp
+5 -5
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@@ -969,7 +969,7 @@ namespace {
&& !captureOrPromotion && !captureOrPromotion
&& !move_is_castle(move)) && !move_is_castle(move))
{ {
double red = ln(RootMoveNumber - MultiPV + 1) * ln(depth / 2) / 3.0; double red = 0.5 + ln(RootMoveNumber - MultiPV + 1) * ln(depth / 2) / 6.0;
if (red >= 1.0) if (red >= 1.0)
{ {
ss[0].reduction = Depth(int(floor(red * int(OnePly)))); ss[0].reduction = Depth(int(floor(red * int(OnePly))));
@@ -1226,7 +1226,7 @@ namespace {
&& !move_is_castle(move) && !move_is_castle(move)
&& !move_is_killer(move, ss[ply])) && !move_is_killer(move, ss[ply]))
{ {
double red = ln(moveCount) * ln(depth / 2) / 3.0; double red = 0.5 + ln(moveCount) * ln(depth / 2) / 6.0;
if (red >= 1.0) if (red >= 1.0)
{ {
ss[ply].reduction = Depth(int(floor(red * int(OnePly)))); ss[ply].reduction = Depth(int(floor(red * int(OnePly))));
@@ -1557,7 +1557,7 @@ namespace {
&& !move_is_killer(move, ss[ply]) && !move_is_killer(move, ss[ply])
/* && move != ttMove*/) /* && move != ttMove*/)
{ {
double red = ln(moveCount) * ln(depth / 2) / 1.5; double red = 0.5 + ln(moveCount) * ln(depth / 2) / 3.0;
if (red >= 1.0) if (red >= 1.0)
{ {
ss[ply].reduction = Depth(int(floor(red * int(OnePly)))); ss[ply].reduction = Depth(int(floor(red * int(OnePly))));
@@ -1902,7 +1902,7 @@ namespace {
&& !move_is_castle(move) && !move_is_castle(move)
&& !move_is_killer(move, ss[sp->ply])) && !move_is_killer(move, ss[sp->ply]))
{ {
double red = ln(moveCount) * ln(sp->depth / 2) / 1.5; double red = 0.5 + ln(moveCount) * ln(sp->depth / 2) / 3.0;
if (red >= 1.0) if (red >= 1.0)
{ {
ss[sp->ply].reduction = Depth(int(floor(red * int(OnePly)))); ss[sp->ply].reduction = Depth(int(floor(red * int(OnePly))));
@@ -2013,7 +2013,7 @@ namespace {
&& !move_is_castle(move) && !move_is_castle(move)
&& !move_is_killer(move, ss[sp->ply])) && !move_is_killer(move, ss[sp->ply]))
{ {
double red = ln(moveCount) * ln(sp->depth / 2) / 3.0; double red = 0.5 + ln(moveCount) * ln(sp->depth / 2) / 6.0;
if (red >= 1.0) if (red >= 1.0)
{ {
ss[sp->ply].reduction = Depth(int(floor(red * int(OnePly)))); ss[sp->ply].reduction = Depth(int(floor(red * int(OnePly))));