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| Flux Chess 2.2.1 UCI | ||
| ==================== | ||
| Flux Chess | ||
| ========== | ||
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| Copyright 2007-2012 Phokham Nonava <[email protected]> | ||
| http://www.fluxchess.com/ | ||
| Copyright 2007-2014 Phokham Nonava <[email protected]> | ||
| http://fluxchess.com | ||
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| [](https://travis-ci.org/fluxroot/flux) [](https://coveralls.io/r/fluxroot/flux?branch=2.x) | ||
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| Introduction | ||
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| As a pure UCI chess engine, Flux does not have a graphical user | ||
| interface. You can load him however into your favorite chess program if | ||
| it supports the UCI protocol. I suggest you take a look at the free | ||
| chess program Arena. I'm personally testing Flux with the Shredder | ||
| Classic chess program. | ||
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| If you find any bugs or just want to write a comment, don't hesitate to | ||
| contact me. | ||
| it supports the UCI protocol. | ||
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| Features | ||
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| In addition Flux supports multi pv output, which means Flux can show | ||
| multiple best pv lines. | ||
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| ### Board | ||
| - 0x88 Board Representation | ||
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| ### Search | ||
| - Alpha-Beta Search | ||
| - Quiescent Search | ||
| - 0x88 Board Representation | ||
| - Iterative Deepening | ||
| - Internal Iterative Deepening | ||
| - Principal Variation Search | ||
| - Aspiration Windows | ||
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| ### Tables | ||
| - Transposition Table with Zobrist Keys | ||
| - Killer Moves | ||
| - Static Exchange Evaluation | ||
| - Killer Heuristic | ||
| - History Heuristic | ||
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| ### Prunings | ||
| ### Prunings and Extensions | ||
| - Mate Distance Pruning | ||
| - Verified Null-Move Pruning | ||
| - Verified Null Move Pruning | ||
| - Futility Pruning, Extended Futility Pruning | ||
| - Late Move Reduction | ||
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| ### Extensions | ||
| - Single-Reply Extension | ||
| - Check Extension | ||
| - Pawn Extension | ||
| - Recapture Extension | ||
| - Mate Threat Extension | ||
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| System Requirements | ||
| ------------------- | ||
| Because Flux is written in Java, you will have to install the Java | ||
| Runtime Environment on your machine. Currently he only supports UCI for | ||
| communicating with the GUI. If you want to use the XBoard interface, | ||
| have a look at PolyGlot. | ||
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| Installation | ||
| ------------ | ||
| Just untar the tar file anywhere you like and add the Flux.bat (Windows) | ||
| or Flux (Linux) as a new engine in your GUI. Make sure you select UCI as | ||
| the protocol type. If you want to use the XBoard protocol there's a | ||
| minimal PolyGlot INI file called polyglot.ini- Windows or | ||
| polyglot.ini-Linux. Here's how to use the engine on linux with xboard: | ||
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| xboard -fd <directory of unzipped Flux> -fcp 'polyglot polyglot.ini-Linux' | ||
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| Configuration | ||
| ------------- | ||
| Flux has its own configuration file and supports the UCI | ||
| option/setoption commands. The configuration file is a plain ASCII file | ||
| and should be placed in the same directory as Flux. Please note that the | ||
| file should be called "Flux.ini". | ||
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| As it is also possible to set the same options in your chess GUI, Flux | ||
| reads the options as follows: | ||
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| 1. If a UCI setoption command is recognized, the option will be set | ||
| according to this value. | ||
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| 2. If there's no setoption command, Flux tries to read the Flux.ini | ||
| file. | ||
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| 3. If the option is not set in the Flux.ini file a compiled-in default | ||
| value is used. | ||
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| Flux recognizes the following options: | ||
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| - Hash (4MB - 256MB, Default: 16MB) | ||
| The Hash Table size in megabytes | ||
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| - Evaluation Table (4MB - 64MB, Default: 4MB) | ||
| The Evaluation Table size in megabytes | ||
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| - Pawn Table (4MB - 16MB, Default: 4MB) | ||
| The Pawn Table size in megabytes | ||
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| Build him | ||
| --------- | ||
| Flux uses [Gradle](http://gradle.org) as build system. To build him from | ||
| source, use the following steps. | ||
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| ### Get him | ||
| `git clone https://github.com/fluxroot/fluxchess.git` | ||
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| ### Build him | ||
| `./gradlew build` | ||
| - Late Move Reductions | ||
| - One Reply Extensions | ||
| - Check Extensions | ||
| - Passed Pawn Extensions | ||
| - Recapture Extensions | ||
| - Mate Threat Extensions | ||
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| ### Grab him | ||
| `cp build/distributions/Flux-2.2.1.tgz <very important engine directory>` | ||
| ### Tables | ||
| - Transposition Table with Zobrist Hashing | ||
| - Evaluation Hash Table | ||
| - Pawn Hash Table | ||
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| License | ||
| ------- | ||
| Flux Chess is released under version 3 of the | ||
| [GPL](http://www.gnu.org/copyleft/gpl.html). | ||
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| Acknowledgments | ||
| --------------- | ||
| Writing a computer chess engine is not an easy task. I have learned a | ||
| lot from the following sources. | ||
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| - Jonatan Pettersson | ||
| Mediocre Chess http://mediocrechess.blogspot.com/ | ||
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| - Ed Schröder | ||
| REBEL/Pro Deo http://members.home.nl/matador/chess840.htm | ||
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| - Bruce Moreland | ||
| Gebril | ||
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| - Fabien Letouzey | ||
| Fruit http://www.fruitchess.com/ | ||
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| - Leo Dijksman | ||
| http://wbec-ridderkerk.nl/ | ||
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| - The UCI Protocol | ||
| http://www.shredderchess.com/download.html | ||
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| - The XBoard Protocol | ||
| http://home.hccnet.nl/h.g.muller/engine-intf.html | ||
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| Changelog | ||
| --------- | ||
| version 2.2.1 (26.06.2012): | ||
| * Prepared for open source. Licensed under GPL. | ||
| * This is a GitHub feature parity release of 2.2 | ||
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| version 2.2 (04.08.2007): | ||
| * Improved several internal data structures to speed up search | ||
| * Improved memory management | ||
| * Improved time management and pondering | ||
| * Improved game phase recognition | ||
| * Changed maximum output depth from 256 to 64 to work around a limitation in polyglot | ||
| * Changed extension handling to speed up search | ||
| * Fixed a race condition with UCI stop command | ||
| * Fixed several small bugs | ||
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| version 2.1 (27.06.2007): | ||
| * Fixed major bug in time management | ||
| * Added UCI searchmoves | ||
| * Changed eval | ||
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| version 2.0 (18.06.2007): | ||
| * Stable release of the 2.x series | ||
| * Added Clear Hash option | ||
| * Added multi pv output | ||
| * Added refutation output | ||
| * Changed version numbering | ||
| * Changed root move generation for multi pv output | ||
| * Changed from instable quick sort to stable insertion sort | ||
| * Changed pruning conditions | ||
| * Removed Limited Razoring | ||
| * Fixed... a lot of bugs | ||
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| version II-0.9 (23.05.2007): | ||
| * Added Futility Pruning in Quiescent | ||
| * Added Mate Threat Extension | ||
| * Added more draw eval | ||
| * Improved time control | ||
| * Improved mate values in Transposition Table | ||
| * Fixed unstoppable passer eval | ||
| * Fixed race condition with pondering | ||
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| version II-0.8 (11.05.2007): | ||
| * Added Late Move Reduction | ||
| * Added Pawn Hashtable | ||
| * Added Recapture Extension | ||
| * Completely revamped evaluation | ||
| * Extracting PV from search instead of the Transposition Table | ||
| * Reduced output on lower search depth | ||
| * Improved time control | ||
| * Improved search response to UCI stop command | ||
| * Changed search and pruning conditions | ||
| * Changed from Launch4j to JSmooth | ||
| * Fixed SEE with en passant moves | ||
| * Fixed deadlock in threading | ||
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| version II-0.7 (22.04.2007): | ||
| * Added Static Exchange Evaluation (SEE) | ||
| * Added Futility Pruning, Extended Futility Pruning, Limited Razoring | ||
| * Added Verified Null-Move Pruning (currently disabled) | ||
| * Added Single-Reply Extension | ||
| * Added Transposition Table aging | ||
| * Added Transposition Table size configuration option | ||
| * Added engine properties file | ||
| * Added UCI movestogo | ||
| * Improved checking moves in quiescent | ||
| * Changed output to send each root move | ||
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| version II-0.6 (11.04.2007): | ||
| * Rewrite move and chessman representation from object to int | ||
| * Rewrite search algorithm | ||
| * Rewrite evaluation | ||
| * Rewrite move generation | ||
| * Added Internal Iterative Deepening | ||
| * Added Evaluation Table | ||
| * Added UCI seldepth | ||
| * Added Mate Distance Pruning | ||
| * Added checking moves in quiescent | ||
| * Improved threading support | ||
| * Improved UCI protocol handling | ||
| * Changed exception preconditions to assertions | ||
| * Removed Refutation Table | ||
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| version II-0.5 (09.03.2007): | ||
| * Rewrite check extension | ||
| * Added pondering | ||
| * Changed move generation order | ||
| * Changed evaluation function and position values | ||
| * Removed external JAR dependencies | ||
| * Fixed thinking output | ||
| * Fixed en passant bug | ||
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| version II-0.4 (06.03.2007): | ||
| * First public release | ||
| * Added Flux.ini for PolyGlot | ||
| * Added README.txt | ||
| * Added FluxII.exe | ||
| * Changed Refutation Table implementation | ||
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| version II-0.3: | ||
| * Changed check mate order | ||
| * Bugfix check mate/stale mate | ||
| * Added game phase recognition | ||
| * Added move number recognition | ||
| * Added double/triple pawn recognition | ||
| * Added check extension | ||
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| version II-0.2: | ||
| * Changed position values | ||
| * Added final statements to improve speed | ||
| * Added Null-Move Forward Pruning | ||
| * Changed Refutation Table implementation | ||
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| version II-0.1: | ||
| * Changed board representation to 0x88 | ||
| * Added en passant move generation | ||
| * Added Perft tests | ||
| * Changed time control | ||
| * Added contempt factor | ||
| * Changed Transposition Table replacement scheme to "replace always" | ||
| * Added Refutation Table | ||
| * Added UCI go command time increment option | ||
| * Changed evaluation function | ||
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| version 1.0: | ||
| * Added array board representation | ||
| * Moved protocol communication infrastructure to own project | ||
| * Changed search algorithm | ||
| * Changed evaluation function | ||
| * Added Zobrist Code generation | ||
| * Added Transposition Table | ||
| * Added move ordering | ||
| * Added quiescent search | ||
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| version 0.4: | ||
| * Added centipawn calculation | ||
| * Added position values | ||
| * Added mate depth recognition | ||
| * Added FEN parsing | ||
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| version 0.3: | ||
| * Added castling move generation | ||
| * Added en passant move | ||
| * Added stale mate check | ||
| * Added UCI ucinewgame command | ||
| Flux Chess is released under version 3 of the [LGPL]. | ||
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| version 0.2: | ||
| * Added Timer functionality | ||
| * Added UCI go command parameters | ||
| * Added UCI debug command | ||
| * Added UCI info command | ||
| * Added UCI stop command | ||
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| version 0.1: | ||
| * Launch4j used to build windows exe | ||
| * Prepared protocol interface for XBoard and UCI | ||
| * Board representation supports 8x8 map board | ||
| [LGPL]: http://www.gnu.org/copyleft/lgpl.html | ||