From: Joona Kiiski <joona.kiiski@gmail.com>
Date: Mon, 6 Jan 2014 19:46:49 +0000 (+0000)
Subject: Tweak King PST tables
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=1fee23a598a54739571e01cfe6aef1c3488b0e74

Tweak King PST tables

First tested with 50K games at very short TC of 5+0.05
ELO: 3.11 +-2.0 (95%) LOS: 99.9%
Total: 49665 W: 10941 L: 10497 D: 28227

Then retested with usual SPRT at short TC
LLR: 2.96 (-2.94,2.94) [-1.50,4.50]
Total: 16875 W: 3198 L: 3049 D: 10628

And at long TC
LLR: 2.95 (-2.94,2.94) [0.00,6.00]
Total: 5890 W: 985 L: 857 D: 4048

bench: 7800379
---

diff --git a/src/psqtab.h b/src/psqtab.h
index 113d264b..09f764a8 100644
--- a/src/psqtab.h
+++ b/src/psqtab.h
@@ -82,14 +82,14 @@ static const Score PSQT[][SQUARE_NB] = {
    S(8,-80), S(8,-54), S(8,-42), S(8,-30), S(8,-30), S(8,-42), S(8,-54), S(8,-80)
   },
   { // King
-   S(302, 18), S(326, 77), S(277,105), S(229,135), S(229,135), S(277,105), S(326, 77), S(302, 18),
-   S(277, 77), S(302,135), S(253,165), S(205,193), S(205,193), S(253,165), S(302,135), S(277, 77),
-   S(229,105), S(253,165), S(205,193), S(157,222), S(157,222), S(205,193), S(253,165), S(229,105),
-   S(205,135), S(229,193), S(182,222), S(134,251), S(134,251), S(182,222), S(229,193), S(205,135),
-   S(182,135), S(205,193), S(157,222), S(109,251), S(109,251), S(157,222), S(205,193), S(182,135),
-   S(149,105), S(177,165), S(131,193), S( 81,222), S( 81,222), S(131,193), S(177,165), S(149,105),
-   S(121, 77), S(144,135), S( 98,165), S( 54,193), S( 54,193), S( 98,165), S(144,135), S(121, 77),
-   S(96,  18), S(119, 77), S( 71,105), S( 26,135), S( 26,135), S( 71,105), S(119, 77), S( 96, 18)
+   S(298, 27), S(332, 81), S(273,108), S(225,116), S(225,116), S(273,108), S(332, 81), S(298, 27),
+   S(287, 74), S(321,128), S(262,155), S(214,163), S(214,163), S(262,155), S(321,128), S(287, 74),
+   S(224,111), S(258,165), S(199,192), S(151,200), S(151,200), S(199,192), S(258,165), S(224,111),
+   S(196,135), S(230,189), S(171,216), S(123,224), S(123,224), S(171,216), S(230,189), S(196,135),
+   S(173,135), S(207,189), S(148,216), S(100,224), S(100,224), S(148,216), S(207,189), S(173,135),
+   S(146,111), S(180,165), S(121,192), S( 73,200), S( 73,200), S(121,192), S(180,165), S(146,111),
+   S(119, 74), S(153,128), S( 94,155), S( 46,163), S( 46,163), S( 94,155), S(153,128), S(119, 74),
+   S( 98, 27), S(132, 81), S( 73,108), S( 25,116), S( 25,116), S( 73,108), S(132, 81), S( 98, 27)
   }
 };