Combo

Combo of two parameter tweaks and tuned values for Queen and ThreatByKing.

STC
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 20180 W: 4439 L: 4198 D: 11543
http://tests.stockfishchess.org/tests/view/5bd7b8250ebc595e0ae22e97

LTC
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 86312 W: 14106 L: 13685 D: 58521
http://tests.stockfishchess.org/tests/view/5bd803560ebc595e0ae23213

This combo consists of the following:

Queen Value (tuned values)
Iter: 72056, A: 5000, alpha 0.602000, gamma 0.101000, clipping old, rounding deterministic
param: QueenValueMg, best: 2528.91, start: 2528.00
param: QueenValueEg, best: 2687.12, start: 2698.00

ThreatByKing (tuned values)
Green STC (50.8k games)
http://tests.stockfishchess.org/tests/view/5bd1d5a00ebc595e0ae1cbec
LTC (I stopped this test at 71.2k games. It's likely yellow.)
http://tests.stockfishchess.org/tests/view/5bd263e70ebc595e0ae1d77e

WeakUnopposedPawn (tweak) by xoto (https://github.com/xoto10)
Green STC (102.8k games)
http://tests.stockfishchess.org/tests/view/5bd306bb0ebc595e0ae1e146
Yellow LTC (90.8k games)
http://tests.stockfishchess.org/tests/view/5bd3ea660ebc595e0ae1f16b

aspiTune1 (tweak) by vondele (https://github.com/vondele)
Green STC (125.9k games)
http://tests.stockfishchess.org/tests/view/5bd2ae100ebc595e0ae1dab0
Yellow LTC (107.9k games)
http://tests.stockfishchess.org/tests/view/5bd3eb700ebc595e0ae1f16f

Thank you @31m059 (Mark Tenzer) for helping me! Also, thank you very much
for recognizing my efforts. I genuinely appreciate it.

Bench: 3556672

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 8a21b0bb5b241685995a17a9cb913e516c70e694..daf0c1d74d7b2c1e1b5460b5714852ce94ec9e08 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -167,13 +167,13 @@ namespace {
   constexpr Score PawnlessFlank      = S( 19, 84);
   constexpr Score RookOnPawn         = S( 10, 30);
   constexpr Score SliderOnQueen      = S( 42, 21);
   constexpr Score PawnlessFlank      = S( 19, 84);
   constexpr Score RookOnPawn         = S( 10, 30);
   constexpr Score SliderOnQueen      = S( 42, 21);

-  constexpr Score ThreatByKing       = S( 23, 76);
+  constexpr Score ThreatByKing       = S( 22, 78);

   constexpr Score ThreatByPawnPush   = S( 45, 40);
   constexpr Score ThreatByRank       = S( 16,  3);
   constexpr Score ThreatBySafePawn   = S(173,102);
   constexpr Score TrappedRook        = S( 92,  0);
   constexpr Score WeakQueen          = S( 50, 10);
   constexpr Score ThreatByPawnPush   = S( 45, 40);
   constexpr Score ThreatByRank       = S( 16,  3);
   constexpr Score ThreatBySafePawn   = S(173,102);
   constexpr Score TrappedRook        = S( 92,  0);
   constexpr Score WeakQueen          = S( 50, 10);

-  constexpr Score WeakUnopposedPawn  = S(  5, 29);
+  constexpr Score WeakUnopposedPawn  = S( 15, 19);

 
 #undef S
 
 
 #undef S
 

diff --git a/src/search.cpp b/src/search.cpp
index d98ba4e42fb8a7c55962d48b0ebd9e5aad7a0d26..2678f7d5d9bae66685e3a108ec1868bdfde5d014 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -388,7 +388,7 @@ void Thread::search() {
           if (rootDepth >= 5 * ONE_PLY)
           {
               Value previousScore = rootMoves[pvIdx].previousScore;
           if (rootDepth >= 5 * ONE_PLY)
           {
               Value previousScore = rootMoves[pvIdx].previousScore;

-              delta = Value(18);
+              delta = Value(20);

               alpha = std::max(previousScore - delta,-VALUE_INFINITE);
               beta  = std::min(previousScore + delta, VALUE_INFINITE);
 
               alpha = std::max(previousScore - delta,-VALUE_INFINITE);
               beta  = std::min(previousScore + delta, VALUE_INFINITE);
 

diff --git a/src/types.h b/src/types.h
index 9e0f8c3e36da2af2a0c3d58e3bafac44907f46ca..66be460d57375f94be1bace8fa775fb040b10de5 100644 (file)
--- a/src/types.h
+++ b/src/types.h
@@ -180,7 +180,7 @@ enum Value : int {
   KnightValueMg = 784,   KnightValueEg = 868,
   BishopValueMg = 828,   BishopValueEg = 916,
   RookValueMg   = 1286,  RookValueEg   = 1378,
   KnightValueMg = 784,   KnightValueEg = 868,
   BishopValueMg = 828,   BishopValueEg = 916,
   RookValueMg   = 1286,  RookValueEg   = 1378,

-  QueenValueMg  = 2528,  QueenValueEg  = 2698,
+  QueenValueMg  = 2529,  QueenValueEg  = 2687,

 
   MidgameLimit  = 15258, EndgameLimit  = 3915
 };
 
   MidgameLimit  = 15258, EndgameLimit  = 3915
 };