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Merge Joona's razoring tweaks

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After proof testing on 3 different engines these
are the results:

Stockfish - Toga II 1.4.1SE +130 -132 =132 49.75%
Stockfish - Deep Sieng 3.0  +145 -110 =150 54.45%
Stockfish - HIARCS 12 MP    +94  -149 =150 43.00%

So it seems no regressions occurs, although also no
improvment. But anyhow this patch increases Stockfish
strenght against itself, so merge it.

Note that this patch not only adds back razoring at depth
one, but also increases razor depth limit from 3 to 4
because hard coded depth 4 limit is no more overwritten
by UCI parameter that otherwise defaults to 3.
This commit is contained in:
Marco Costalba
2009-04-28 08:51:11 +02:00
parent fbca16da57 bd26374f21
commit f1d982e2c0
2 changed files with 17 additions and 27 deletions
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4
src/ucioption.cpp
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@@ -127,10 +127,6 @@ namespace {
o["Threat Depth"] = Option(5, 0, 100);
o["Futility Pruning (Main Search)"] = Option(true);
o["Futility Pruning (Quiescence Search)"] = Option(true);
o["Futility Margin (Quiescence Search)"] = Option(50, 0, 1000);
o["Futility Margin Scale Factor (Main Search)"] = Option(100, 0, 1000);
o["Maximum Razoring Depth"] = Option(3, 0, 4);
o["Razoring Margin"] = Option(300, 150, 600);
o["LSN filtering"] = Option(true);
o["LSN Time Margin (sec)"] = Option(4, 1, 10);
o["LSN Value Margin"] = Option(200, 100, 600);