From: xoto10 <buylow001@gmail.com>
Date: Sun, 7 Jul 2019 01:20:49 +0000 (+0100)
Subject: Combo of statscore divisor and pawn psqt changes
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=5a7827d59de5e3dea0d90bdb3e7c57153c0a9f1f;ds=sidebyside

Combo of statscore divisor and pawn psqt changes

Passed STC 10+0.1 th 1:
LLR: 2.96 (-2.94,2.94) [0.00,4.00]
Total: 13282 W: 3100 L: 2881 D: 7301
http://tests.stockfishchess.org/tests/view/5d21132e0ebc5925cf0c81f4

Passed LTC 60+0.6 th 1:
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 44243 W: 7768 L: 7468 D: 29007
http://tests.stockfishchess.org/tests/view/5d2119050ebc5925cf0c832b

Bench 3705891
---

diff --git a/src/psqt.cpp b/src/psqt.cpp
index cba6bb06..36d99feb 100644
--- a/src/psqt.cpp
+++ b/src/psqt.cpp
@@ -93,12 +93,12 @@ constexpr Score Bonus[][RANK_NB][int(FILE_NB) / 2] = {
 constexpr Score PBonus[RANK_NB][FILE_NB] =
   { // Pawn (asymmetric distribution)
    { },
-   { S(  0,-10), S( -5,-3), S( 10, 7), S( 13,-1), S( 21,  7), S( 17,  6), S(  6, 1), S( -3,-20) },
-   { S(-11, -6), S(-10,-6), S( 15,-1), S( 22,-1), S( 26, -1), S( 28,  2), S(  4,-2), S(-24, -5) },
-   { S( -9,  4), S(-18,-5), S(  8,-4), S( 22,-5), S( 33, -6), S( 25,-13), S( -4,-3), S(-16, -7) },
-   { S(  6, 18), S( -3, 2), S(-10, 2), S(  1,-9), S( 12,-13), S(  6, -8), S(-12,11), S(  1,  9) },
-   { S( -6, 25), S( -8,17), S(  5,19), S( 11,29), S(-14, 29), S(  0,  8), S(-12, 4), S(-14, 12) },
-   { S(-10, -1), S(  6,-6), S( -5,18), S(-11,22), S( -2, 22), S(-14, 17), S( 12, 2), S( -1,  9) }
+   { S(  3,-10), S(  3, -6), S( 10, 10), S( 19,  0), S( 16, 14), S( 19,  7), S(  7, -5), S( -5,-19) },
+   { S( -9,-10), S(-15,-10), S( 11,-10), S( 15,  4), S( 32,  4), S( 22,  3), S(  5, -6), S(-22, -4) },
+   { S( -8,  6), S(-23, -2), S(  6, -8), S( 20, -4), S( 40,-13), S( 17,-12), S(  4,-10), S(-12, -9) },
+   { S( 13,  9), S(  0,  4), S(-13,  3), S(  1,-12), S( 11,-12), S( -2, -6), S(-13, 13), S(  5,  8) },
+   { S( -5, 28), S(-12, 20), S( -7, 21), S( 22, 28), S( -8, 30), S( -5,  7), S(-15,  6), S(-18, 13) },
+   { S( -7,  0), S(  7,-11), S( -3, 12), S(-13, 21), S(  5, 25), S(-16, 19), S( 10,  4), S( -8,  7) }
   };
 
 #undef S
diff --git a/src/search.cpp b/src/search.cpp
index 8993a4b0..ff7a2c23 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1115,7 +1115,7 @@ moves_loop: // When in check, search starts from here
                   r += ONE_PLY;
 
               // Decrease/increase reduction for moves with a good/bad history (~30 Elo)
-              r -= ss->statScore / 20000 * ONE_PLY;
+              r -= ss->statScore / 16384 * ONE_PLY;
           }
 
           Depth d = clamp(newDepth - r, ONE_PLY, newDepth);