Combusken

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Combusken, an UCI compliant open source chess engine by Marcin Henryk Bartkowiak, written in the Go programming language, first released in February 2020 under the GPL 3. Already playing since April 2019 at Lichess, it had its tournament debut at TCEC Season 18.

=Features=

Board Representation

 * Bitboards
 * Plain Magic Bitboards

Search

 * Lazy SMP
 * Iterative Deepening
 * Aspiration Windows
 * Alpha-Beta
 * Transposition Table
 * Selectivity
 * Check Extensions
 * Castling Extension
 * Singular Extensions
 * Late Move Reductions
 * Null Move Pruning
 * Futility Pruning
 * Reverse Futility Pruning
 * Late Move Pruning
 * Static Exchange Evaluation Pruning
 * Move Ordering
 * Hash Move
 * Internal Iterative Deepening
 * MVV/LVA
 * Static Exchange Evaluation
 * Killer Heuristic
 * History Heuristic
 * Countermove Heuristic
 * Follow Up History

Evaluation

 * Tapered Eval
 * Material
 * Bishop Pair
 * Piece-Square Tables
 * Mobility
 * Outposts
 * Rook on (Half) Open File
 * Pawn-King Hash Table
 * Pawn Structure
 * Passed Pawn
 * Isolated Pawn
 * Doubled Pawn
 * Backward Pawn
 * Straggler
 * Connected Pawns
 * King Safety
 * Pawn Shield
 * Pawn Storm
 * Attacking King Zone
 * Hanging Pieces
 * Tempo
 * Automated Tuning using Gradient Descent

Misc

 * Syzygy Bases using Fathom
 * Perft

=Thanks= The author mentions following engines and their authors for implementation details and tuning positions :
 * CounterGo by Vadim Chizhov
 * Ethereal by Andrew Grant
 * Laser by Jeffrey An
 * Stockfish by Tord Romstad, Marco Costalba, Joona Kiiski and Gary Linscott
 * Zurichess by Alexandru Mosoi

=Forum Posts=
 * Re: New engine releases 2020 by Marcin Henryk Bartkowiak, CCC, February 23, 2020
 * Re: New engine releases 2020 by Marcin Henryk Bartkowiak, CCC, April 06, 2020
 * Re: New engine releases 2020 by Marcin Henryk Bartkowiak, CCC, October 31, 2020

=External Links=

Chess Engine

 * GitHub - mhib/combusken: A chess engine
 * Combusken in CCRL 40/15
 * ombuskengine • lichess.org

Misc

 * List of generation III Pokémon - Combusken from Wikipedia

=References= Up one Level