Mr Bob

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Mr. Bob [1] Mr Bob,

an UCI compliant open source chess engine by Vincent Yu, written in C++, licensed under the GPL v3 and first released on GitHub in January 2020 [2].

Board Representation

• Bitboards
• Dumb7Fill to initialize
• Magic Bitboards

Search

• Iterative Deepening
• Aspiration Windows
• Lazy SMP
• Principal Variation Search
• Transposition Table
  • Shared Hash Table
  • Zobrist Hashing
• Move Ordering
  • PV-Move
  • Promotions
  • MVV/LVA
  • Killer Heuristic
  • Countermove Heuristic
  • History Heuristic
• Selectivity
  • Razoring
  • Reverse Futility Pruning
  • Null Move Pruning
  • Mate Distance Pruning
  • Futility Pruning
  • SEE Pruning
  • Late Move Pruning
  • Late Move Reductions
  • Check Extensions
  • Quiescence Search

Evaluation

• Tapered Eval
• Material
  • Bishop Pair
  • Draw Evaluation
• Piece-Square Tables
• Mobility
  • Trapped Rooks
  • Rooks on (Semi) Open Files
• Knight Outposts
• Pawn Structure
  • Pawn Hash Table
  • Backward Pawn
  • Doubled Pawn
  • Isolated Pawn
  • Connected Pawns
  • Passed Pawn
• King Safety
  • Pawn Shelter
  • Attacking King Zone

Forum Posts#

• Re: New engine releases 2020 by Günther Simon, CCC, September 08, 2020
• Re: New engine releases 2020 by Günther Simon, CCC, October 29, 2020

External Links#

• GitHub - bobsquared/Mr_Bob_Chess: Chess engine in C++
• Mr Bob in CCRL Blitz

References#

1. ↑ Rachel Baker Gale (1894). Mr. Bob; a comedy in two acts. Boston, Walter H. Baker & Co., Wikimedia Commons
2. ↑ Release v0.1 · bobsquared/Mr_Bob_Chess · GitHub
3. ↑ Features based on Release Mr Bob v0.9.0 · bobsquared/Mr_Bob_Chess · GitHub

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