From: Marco Costalba <mcostalba@gmail.com>
Date: Tue, 28 Apr 2009 06:51:11 +0000 (+0200)
Subject: Merge Joona's razoring tweaks
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=f1d982e2c07372627394b83cf24f48e77a34145b;ds=sidebyside

Merge Joona's razoring tweaks
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.
---

f1d982e2c07372627394b83cf24f48e77a34145b
diff --cc src/ucioption.cpp
index 006c4c56,63c27403..442ca924
--- a/src/ucioption.cpp
+++ b/src/ucioption.cpp
@@@ -125,12 -125,9 +125,8 @@@ namespace 
      o["Full Depth Moves (PV nodes)"] = Option(14, 1, 100);
      o["Full Depth Moves (non-PV nodes)"] = Option(3, 1, 100);
      o["Threat Depth"] = Option(5, 0, 100);
 -    o["Selective Plies"] = Option(7, 0, 10);
      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);