Release Igel 3.2.0 (#266)

vshcherbyna · web-flow · commit abeb25e35017 · 2022-12-17T18:35:30.000Z
Igel 3.2.0 ------------- 17-Dec-2022 - address #264 - smaller margin for prunning quiets - scale down eval to 1000 - history extensions only on non pv moves - adjust scale formula - less reductions in lmp when not improving - negative extensions - futility pruning improvements - implement cutnode - new network ign-1-9a48854b created by using prev network (ign-1-3e998e78) and re-trained with a different lambda http://chess.grantnet.us/test/29871/ ELO | 41.22 +- 3.25 (95%) CONF | 10.0+0.10s Threads=1 Hash=8MB GAMES | N: 25008 W: 8572 L: 5619 D: 10817 http://chess.grantnet.us/test/29874/ ELO | 43.53 +- 3.13 (95%) CONF | 60.0+0.60s Threads=1 Hash=64MB GAMES | N: 25000 W: 8152 L: 5036 D: 11812 BENCH: 3925018
diff --git a/.travis.yml b/.travis.yml
diff --git a/README.md b/README.md
@@ -87,7 +87,7 @@ Using cmake/gcc:
 git clone https://github.com/vshcherbyna/igel.git ./igel
 cd igel
 git submodule update --init --recursive
-wget https://github.com/vshcherbyna/igel/releases/download/3.1.0/ign-1-3e998e78 -O ./network_file
+wget https://github.com/vshcherbyna/igel/releases/download/3.2.0/ign-1-9a48854b -O ./network_file
 cmake -DEVALFILE=network_file -DEVAL_NNUE=1 -DUSE_PEXT=1 -DUSE_AVX2=1 -D_BTYPE=1 -DSYZYGY_SUPPORT=TRUE .
 make -j
 ```
diff --git a/history.txt b/history.txt
@@ -1,7 +1,21 @@
 Igel - open source chess engine forked from GreKo 2018.01.
 
 (c) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-(c) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+(c) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+
+Igel 3.2.0
+-------------
+17-Dec-2022
+
+- smaller margin for prunning quiets
+- scale down eval to 1000
+- history extensions only on non pv moves
+- adjust scale formula
+- less reductions in lmp when not improving
+- negative extensions
+- futility pruning improvements
+- implement cutnode
+- new network ign-1-9a48854b created by using prev network (ign-1-3e998e78) and re-trained with a different lambda
 
 Igel 3.1.0
 -------------
diff --git a/src/bitboards.cpp b/src/bitboards.cpp
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/bitboards.h b/src/bitboards.h
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/eval_params.cpp b/src/eval_params.cpp
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/eval_params.h b/src/eval_params.h
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/evaluate.cpp b/src/evaluate.cpp
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/evaluate.h b/src/evaluate.h
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/history.cpp b/src/history.cpp
@@ -1,7 +1,7 @@
 /*
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
-*  Copyright (C) 2019-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2019-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/history.h b/src/history.h
@@ -1,7 +1,7 @@
 /*
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
-*  Copyright (C) 2019-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2019-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/main.cpp b/src/main.cpp
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
@@ -57,7 +57,7 @@ int main(int argc, const char* argv[])
     //  for debugging purposes load official network file
     //
 
-    if (!Eval::NNUE::load_eval_file("ign-1-3e998e78")) {
+    if (!Eval::NNUE::load_eval_file("ign-1-9a48854b")) {
         std::cout << "Unable to set EvalFile. Aborting" << std::endl;
         abort();
     }
diff --git a/src/makefile b/src/makefile
@@ -9,7 +9,7 @@ SRC = *.cpp nnue/*.cpp nnue/features/*.cpp fathom/tbprobe.c
 
 GCCDEFINES = $(shell echo | $(CC) -m64 -march=native -E -dM -)
 
-EVALFILE = weights/ign-1-3e998e78
+EVALFILE = weights/ign-1-9a48854b
 NNFLAGS  = -DEVALFILE=\"$(EVALFILE)\"
 
 LIBS   = -std=c++17 -mpopcnt -pthread
diff --git a/src/moveeval.cpp b/src/moveeval.cpp
@@ -1,7 +1,7 @@
 /*
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
-*  Copyright (C) 2019-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2019-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/moveeval.h b/src/moveeval.h
@@ -1,7 +1,7 @@
 /*
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
-*  Copyright (C) 2019-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2019-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/moves.cpp b/src/moves.cpp
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/moves.h b/src/moves.h
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/notation.cpp b/src/notation.cpp
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/notation.h b/src/notation.h
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/position.cpp b/src/position.cpp
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/position.h b/src/position.h
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/search.cpp b/src/search.cpp
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/search.h b/src/search.h
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/time.cpp b/src/time.cpp
@@ -1,7 +1,7 @@
 /*
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/time.h b/src/time.h
@@ -1,7 +1,7 @@
 /*
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/tt.cpp b/src/tt.cpp
@@ -1,7 +1,7 @@
 /*
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/tt.h b/src/tt.h
@@ -1,7 +1,7 @@
 /*
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/types.h b/src/types.h
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/uci.cpp b/src/uci.cpp
@@ -1,7 +1,7 @@
 /*
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
-*  Copyright (C) 2019-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2019-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
@@ -30,7 +30,7 @@
 #include <iostream>
 #include <sstream>
 
-const std::string VERSION = "3.1.9";
+const std::string VERSION = "3.2.0";
 
 #if defined(ENV64BIT)
     #if defined(_BTYPE)
@@ -61,7 +61,7 @@ const int MAX_THREADS     = 1024;
 
 int Uci::handleCommands()
 {
-    std::cout << "Igel " << VERSION << ARCHITECTURE << " by V. Medvedev, V. Shcherbyna" << std::endl;
+    std::cout << "Igel " << VERSION << ARCHITECTURE << " by V. Shcherbyna (Igel author 2018-2023), V. Medvedev (GreKo author 2002-2018)" << std::endl;
 
     if (!TTable::instance().setHashSize(DEFAULT_HASH_SIZE, DEFAULT_THREADS)) {
         std::cout << "Fatal error: unable to allocate memory for transposition table" << std::endl;
@@ -131,7 +131,7 @@ void Uci::onUci()
     std::cout << "option name Ponder type check" <<
         " default false" << std::endl;
 
-    std::cout << "option name Skill Level type spin" <<
+    std::cout << "option name Skill type spin" <<
         " default " << DEFAULT_LEVEL <<
         " min "		<< MIN_LEVEL	<<
         " max "		<< MAX_LEVEL << std::endl;
@@ -302,7 +302,7 @@ void Uci::onSetOption(commandParams params)
         m_searcher.setThreadCount(threads - 1);
         onUciNewGame(); // reset internal state of each thread
     }
-    else if (name == "Skill Level") {
+    else if (name == "Skill") {
         auto level = atoi(value.c_str());
 
         if (level > MAX_LEVEL || MIN_LEVEL < 0)
diff --git a/src/uci.h b/src/uci.h
@@ -1,7 +1,7 @@
 /*
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
-*  Copyright (C) 2019-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2019-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/utils.cpp b/src/utils.cpp
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
diff --git a/src/utils.h b/src/utils.h
@@ -2,7 +2,7 @@
 *  Igel - a UCI chess playing engine derived from GreKo 2018.01
 *
 *  Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)
-*  Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
+*  Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>
 *
 *  Igel is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by

Original file line number	Diff line number	Diff line change
`@@ -2,7 +2,7 @@`
`2`	`2`	`* Igel - a UCI chess playing engine derived from GreKo 2018.01`
`3`	`3`	`*`
`4`	`4`	`* Copyright (C) 2002-2018 Vladimir Medvedev <vrm@bk.ru> (GreKo author)`
`5`		`-* Copyright (C) 2018-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>`
	`5`	`+* Copyright (C) 2018-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>`
`6`	`6`	`*`
`7`	`7`	`* Igel is free software: you can redistribute it and/or modify`
`8`	`8`	`* it under the terms of the GNU General Public License as published by`
Original file line number	Diff line number	Diff line change
`@@ -1,7 +1,7 @@`
`1`	`1`	`/*`
`2`	`2`	`* Igel - a UCI chess playing engine derived from GreKo 2018.01`
`3`	`3`	`*`
`4`		`-* Copyright (C) 2019-2022 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>`
	`4`	`+* Copyright (C) 2019-2023 Volodymyr Shcherbyna <volodymyr@shcherbyna.com>`
`5`	`5`	`*`
`6`	`6`	`* Igel is free software: you can redistribute it and/or modify`
`7`	`7`	`* it under the terms of the GNU General Public License as published by`