Edit Infobox GBA Homebrews: Chessyka GBA

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{{#seo: |title= (Board) - GameBrew |title_mode=append |image=chessyka2.png |image_alt=Chessyka }} Chessyka is a chess game for Gameboy Advance developed by Kay Hornig. This homebrew was developed to learn how to code for the Game Boy Advance console. ==User guide== Chessyka is aware of all chess rules, including ""en passant"", castle, 50-moves-draw and 3x-repetition-draw. Currently only the english language and basic undo of moves are activated. The multilanguage menu (english, german and espanol) and the advanced undo/redo feature are disabled. There are some missing features e.g.: permanent brain, search depth extensions and an opening book which is worth the name. ===About AI=== The AI use alpha-beta-search, 0x88 and bitfield representation of the board, hashing with zobrist keys and moveordering. There is an opening book included, but currently this is only a proof of concept and contain only some minor variants of the french defense. A special feature is the possibility to enter a custom position. Although there is only a very simple check for plausibility. If you are playing with AI, try level 4. Lower is probably to weak and higher needs to much time. A level is a combination of time and search depth. On level 4 chessyka will search at depth 4 (plys) but uses at maximum 2 minutes per ply (average). Which means it will use a part of the spared time from previous moves (e.g. from using the openening book). On level 5 it use 3 minutes per ply average. If you can afford this, it is obvious better. ==Screenshots== https://dlhb.gamebrew.org/gbahomebrews/chessyka3.png https://dlhb.gamebrew.org/gbahomebrews/chessyka4.png  ==Online emulator== {{EmulatorJS Main |width=480px |height=400px |EJS_backgroundBlur=false |EJS_backgroundImage=https://www.gamebrew.org/images/d/d7/Chessyka2.png |EJS_core=gba |EJS_gameName=Chessyka |EJS_gameUrl=https://dlhb.gamebrew.org/onlineemulators/gba/chessyka_v0.9.7z }} {{GBA Control Settings}}  ==Compatibility== Tested with no$gba, VisualBoy Advance and on real devices: GBASP and NDS lite. For the real devices it was tested with EZF advance, GBAMP v2 CF and Supercard mini SD. ==External links== * Author's website - http://www.khornig.de/chessyka/gba.htm

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