Berserk

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Berserker

Berserk,
an UCI compliant open source chess engine by Jay Honnold, written in C and licensed under the GPL v3.0, first released in February 2021 . Berserk 4.2.0-dev had its tournament debut at TCEC Season 21 in May 2021 and gained a respectable 50% score in its strong Qualification League.

Credit

Berserk was influenced by other engines, engine authors and resources :

• Chess22k by Sander Maassen vd Brink
• BBC and its Video Series by Maksim Korzh
• Martin Sedlak
• Vice by BlueFeverSoft
• Stockfish by Tord Romstad, Marco Costalba, Joona Kiiski and Gary Linscott et al.
• Ethereal and OpenBench by Andrew Grant
• CPW (thank you)

Features

Board Representation

• Bitboards
• Magic Bitboards

Search

• Lazy SMP
• Iterative Deepening
• Aspiration Windows
• Negamax
• Principal Variation Search
• Transposition Table
• Move Ordering
  • Internal Iterative Deepening
  • Killer Heuristic
  • History Heuristic
  • Countermove Heuristic
  • Butterfly Heuristic
  • MVV/LVA
  • SEE
• Selectivity
  • Mate Distance Pruning
  • Reverse Futility Pruning
  • Null Move Pruning
  • Late Move Pruning
  • SEE Pruning
  • Singular Extensions
  • Late Move Reductions
  • Delta Pruning
  • Quiescence Search

Evaluation

• Tapered Eval
• Material
  • Bishop Pair
• Piece-Square Tables
• Mobility
  • Trapped Pieces
  • Rooks on (Semi) Open Files
• Outposts
• Pawn Structure
  • Pawn Hash Table
  • Backward Pawn
  • Doubled Pawn
  • Isolated Pawn
  • Connected Pawns
  • Candidate Passed Pawn
  • Passed Pawn
• King Safety
  • Attacking King Zone
  • Pawn Shelter
  • Pawn Storm
  • Square Control
• Tactical Pattern
  • Threats
  • Battery
  • Hanging Pieces
• Tempo

Misc

• Texel's Tuning Method
• KPK Bitbase by Martin Sedlak

See also

• Zerker

Forum Posts

• Berserk Chess Engine (new) by Jay Honnold, CCRL Discussion Board, February 20, 2021
• Re: New engine releases & news 2021 by Gabor Szots, CCC, February 20, 2021

Re: New engine releases & news 2021 (Berserk 2.0.0) by Gabor Szots, CCC, March 05, 2021

Re: New engine releases & news 2021 (Berserk 3.0.0) by Gabor Szots, CCC, March 19, 2021

Re: New engine releases & news 2021 (Berserk 4.0.0) by Jay Honnold, CCC, April 27, 2021

Re: New engine releases & news 2021 (Berserk 4.1.0) by Jay Honnold, CCC, May 02, 2021

Re: New engine releases & news 2021 (Berserk 4.2.0) by Jay Honnold, CCC, May 25, 2021

External Links

Chess Engine

• GitHub - jhonnold/berserk: UCI Chess Engine written in C
• Berserk in CCRL Blitz
• Berserk in CCRL 40/15

Misc

• berserk - Wiktionary
• Berserk from Wikipedia
• Berserker (disambiguation) from Wikipedia
• Berserker from Wikipedia
• The Dave Fox Group - Berserker, Gatewalk (2004), YouTube Video

References

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