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‎Berserk-13_Linux_arm64/Berserk-13_Linux_arm64/Berserk-13_Linux_arm64

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‎Berserk-13_Linux_arm64/Berserk-13_Linux_arm64/LICENSE

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‎Berserk-13_Linux_arm64/Berserk-13_Linux_arm64/README.md

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![AUR version](https://img.shields.io/aur/version/berserk)
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# Berserk Chess Engine
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<img src="resources/berserk.jpg" alt="Berserk" width="400" />
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A UCI chess engine written in C. Feel free to challenge me on [Lichess](https://lichess.org/@/BerserkEngine)!
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## Strength
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### Rating Lists + Elo
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Many websites use an [Elo rating system](https://en.wikipedia.org/wiki/Elo_rating_system) to present relative skill amongst engines.
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Below is a list of many chess engine lists throughout the web (*variance in Elo is due to different conditions for each list*)
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* [CCRL 40/15](https://ccrl.chessdom.com/ccrl/4040/) - **3514 4CPU, 3480 1CPU**
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* [CCRL 40/2](https://ccrl.chessdom.com/ccrl/404/) - **3667 1CPU**
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* [IpMan Chess](https://ipmanchess.yolasite.com/r9-7945hx.php) - **3547 1CPU**
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* [CEGT](http://www.cegt.net/40_4_Ratinglist/40_4_single/rangliste.html) - **3598 1CPU**
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* [SPCC](https://www.sp-cc.de/) - **3733 1CPU**
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* ~~[FGRL](www.fastgm.de/60-0.60.html) - **3518 1CPU**~~
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* List no longer maintained
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### Tournaments/Events with Berserk
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- [TCEC](https://tcec-chess.com/)
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- [CCC](https://www.chess.com/computer-chess-championship)
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- [Graham's Broadcasts](https://ccrl.live/)
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## Functional Details
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### Board Representation and Move Generation
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- [Bitboards](https://www.chessprogramming.org/Bitboards)
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- [Magic Bitboards](https://www.chessprogramming.org/Magic_Bitboards)
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- [Staged Move Gen](https://www.chessprogramming.org/Move_Generation#Staged_move_generation)
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### Search
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- [Negamax](https://www.chessprogramming.org/Negamax)
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- [PVS](https://www.chessprogramming.org/Principal_Variation_Search)
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- [Quiescence](https://www.chessprogramming.org/Quiescence_Search)
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- [Iterative Deepening](https://www.chessprogramming.org/Iterative_Deepening)
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- [Transposition Table](https://www.chessprogramming.org/Transposition_Table)
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- [Aspiration Windows](https://www.chessprogramming.org/Aspiration_Windows)
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- [Internal Iterative Reductions](https://www.talkchess.com/forum3/viewtopic.php?f=7&t=74769)
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- [Reverse Futility Pruning](https://www.chessprogramming.org/Reverse_Futility_Pruning)
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- [Razoring](https://www.chessprogramming.org/Razoring)
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- [Null Move Pruning](https://www.chessprogramming.org/Null_Move_Pruning)
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- [ProbCut](https://www.chessprogramming.org/ProbCut)
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- [FutilityPruning](https://www.chessprogramming.org/Futility_Pruning)
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- [LMP](https://www.chessprogramming.org/Futility_Pruning#MoveCountBasedPruning)
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- History Pruning
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- [SEE](https://www.chessprogramming.org/Static_Exchange_Evaluation)
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- Static Exchange Evaluation Pruning
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- [LMR](https://www.chessprogramming.org/Late_Move_Reductions)
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- [Killer Heuristic](https://www.chessprogramming.org/Killer_Heuristic)
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- [Countermove Heuristic](https://www.chessprogramming.org/Countermove_Heuristic)
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- [Extensions](https://www.chessprogramming.org/Extensions)
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- [Singular](https://www.chessprogramming.org/Singular_Extensions)
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### Evaluation
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- [NNUE](https://www.chessprogramming.org/NNUE)
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- Horizontally Mirrored 16 Buckets
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- 2x(12288 -> 512) -> 1
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- [Berserk FenGen](https://github.com/jhonnold/berserk/tree/fen-gen)
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- [Grapheus](https://github.com/Luecx/Grapheus)
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- ~~[Koivisto's CUDA Trainer](https://github.com/Luecx/CudAD)~~
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- This has been deprecated in favor of an even newer trainer written by Luecx, Grapheus.
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- ~~[Berserk Trainer](https://github.com/jhonnold/berserk-trainer)~~
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- This has been deprecated in favor of Koivisto's trainer, but trained all networks through Berserk 8.5.1+
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## Building
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```bash
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git clone https://github.com/jhonnold/berserk && \
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cd berserk/src && \
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make pgo CC=clang && \
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./berserk
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```
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## Credit
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This engine could not be written without some influence and they are...
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### Engine Influences
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- [Stockfish](https://github.com/official-stockfish/Stockfish)
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- [Ethereal](https://github.com/AndyGrant/Ethereal)
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- [Koivisto](https://github.com/Luecx/Koivisto)
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- [Weiss](https://github.com/TerjeKir/weiss)
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- [Chess22k](https://github.com/sandermvdb/chess22k)
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- [BBC](https://github.com/maksimKorzh/chess_programming)
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- [Cheng](https://www.chessprogramming.org/Cheng)
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### Additional Resources
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- [Grapheus](https://github.com/Luecx/Grapheus)
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- [Koivisto's CUDA Trainer](https://github.com/Luecx/CudAD)
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- [OpenBench](https://github.com/AndyGrant/OpenBench)
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- [TalkChess Forum](http://talkchess.com/forum3/viewforum.php?f=7)
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- [CCRL](https://kirill-kryukov.com/chess/discussion-board/viewforum.php?f=7)
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- [JCER](https://chessengines.blogspot.com/p/rating-jcer.html)
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- [Cute Chess](https://cutechess.com/)
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- [Arena](http://www.playwitharena.de/)
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- [CPW](https://www.chessprogramming.org/Main_Page)
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- Lars in Grahams Broadcast rooms
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‎Berserk-13_Linux_arm64/Berserk-13_Linux_arm64/berserk.jpg

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‎Berserk-13_Linux_arm64/Berserk-13_Linux_arm64/chessengeria.eu.url

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[InternetShortcut]
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URL=https://www.chessengeria.eu/

‎Berserk-13_Linux_arm64/Berserk-13_Linux_arm64/source/.clang-format

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BasedOnStyle: google
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AlignAfterOpenBracket: Align
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AlignConsecutiveAssignments: Consecutive
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AlignConsecutiveBitFields: Consecutive
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AlignConsecutiveMacros: Consecutive
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AlignOperands: true
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AlignTrailingComments: true
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AllowAllArgumentsOnNextLine: false
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AllowAllParametersOfDeclarationOnNextLine: false
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AllowShortBlocksOnASingleLine: false
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AllowShortCaseLabelsOnASingleLine: true
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AllowShortEnumsOnASingleLine: false
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AllowShortFunctionsOnASingleLine: false
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AllowShortIfStatementsOnASingleLine: false
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AllowShortLambdasOnASingleLine: true
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AllowShortLoopsOnASingleLine: false
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AlwaysBreakAfterReturnType: None
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AlwaysBreakBeforeMultilineStrings: true
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AlwaysBreakTemplateDeclarations: Yes
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BinPackArguments: false
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BinPackParameters: false
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BitFieldColonSpacing: Both
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BreakBeforeBinaryOperators: None
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BreakBeforeBraces: Attach
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BreakBeforeTernaryOperators: false
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BreakConstructorInitializers: AfterColon
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BreakInheritanceList: AfterColon
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BreakStringLiterals: true
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ColumnLimit: 120
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CompactNamespaces: false
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ContinuationIndentWidth: 2
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EmptyLineAfterAccessModifier: Never
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EmptyLineBeforeAccessModifier: Always
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FixNamespaceComments: false
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IndentWidth: 2
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InsertTrailingCommas: Wrapped
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KeepEmptyLinesAtTheStartOfBlocks: false
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Language: Cpp
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MaxEmptyLinesToKeep: 1
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PointerAlignment: Left
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ReflowComments: true
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SortIncludes: CaseInsensitive
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SpaceAfterCStyleCast: true
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SpaceAfterLogicalNot: false
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SpaceAfterTemplateKeyword: false
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SpaceBeforeAssignmentOperators: true
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SpaceBeforeCaseColon: false
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SpaceBeforeCpp11BracedList: true
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SpaceBeforeInheritanceColon: true
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SpaceBeforeParens: true
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SpaceBeforeRangeBasedForLoopColon: true
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SpaceBeforeSquareBrackets: false
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SpaceInEmptyBlock: false
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SpaceInEmptyParentheses: false
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SpacesBeforeTrailingComments: 1
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SpacesInAngles: false
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SpacesInCStyleCastParentheses: false
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SpacesInConditionalStatement: false
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SpacesInContainerLiterals: false
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SpacesInParentheses: false
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SpacesInSquareBrackets: false

‎Berserk-13_Linux_arm64/Berserk-13_Linux_arm64/source/.github/workflows/berserk.yml

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name: Berserk Validation
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on:
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push:
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workflow_dispatch:
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jobs:
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engine:
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name: Berserk on ${{matrix.os}} with gcc-${{matrix.version}}
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runs-on: ${{matrix.os}}
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strategy:
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matrix:
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os: [ubuntu-20.04]
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version: [11]
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steps:
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- name: Set up GCC ${{matrix.version}}
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uses: egor-tensin/setup-gcc@v1
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with:
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version: ${{matrix.version}}
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platform: x64
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- name: Clone Berserk
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uses: actions/checkout@v2
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- name: Compile
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run: cd src && make build ARCH=avx2
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- name: Bench
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run: |
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bench=$(git show --summary | grep -Po '(?<=Bench: )[0-9]+?(?=$)')
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./src/berserk bench > output
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real=$(grep 'Results:' output | grep -Po '(?<=[\s]{5})[0-9]+?(?= nodes)')
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if [[ "$bench" != "$real" ]]; then echo "got $real, expected $bench" && exit 1; fi
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- name: Install Expect
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run: sudo apt-get install -y expect
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- name: Perft Test
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run: ./tests/perft.sh 1>/dev/null
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clang-format-checking:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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- uses: RafikFarhad/[email protected]
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with:
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sources: 'src/*.c,src/*.h'

‎Berserk-13_Linux_arm64/Berserk-13_Linux_arm64/source/.gitignore

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# Prerequisites
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*.d
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# Object files
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*.o
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*.ko
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*.obj
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*.elf
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# Linker output
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*.ilk
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*.map
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*.exp
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# Precompiled Headers
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*.gch
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*.pch
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# Libraries
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*.lib
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*.a
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*.la
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*.lo
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# Shared objects (inc. Windows DLLs)
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*.dll
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*.so
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*.so.*
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*.dylib
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# Executables
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*.exe
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*.out
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*.app
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*.i*86
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*.x86_64
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*.hex
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# Debug files
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*.dSYM/
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*.su
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*.idb
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*.pdb
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# Kernel Module Compile Results
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*.mod*
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*.cmd
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.tmp_versions/
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modules.order
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Module.symvers
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Mkfile.old
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dkms.conf
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berserk
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berserk-popcnt
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.vscode
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.idea
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dist
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*.log
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*.nn

‎Berserk-13_Linux_arm64/Berserk-13_Linux_arm64/source/.gitmodules

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