Chesley

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[.jpg) Joe Biden & Chesley Sullenberger [1] Chesley,

a Chess Engine Communication Protocol compatible open source chess engine by Matt Gingell, written in C++, licensed under the GPL 2.0, targeting Windows, Linux and Mac OS, first released to the public in May 2009 [2]. The chess engine takes its name from Chesley B. “Sully” Sullenberger, the pilot who successfully landed an airplane on the Hudson river around the time Matt was getting started [3].

Features#

Board Representation

• Bitboards
• Rotated Bitboards

Search

• Iterative Deepening
• Aspiration Windows
• Principal Variation Search
• Transposition Table
• Move Ordering
  • Hash Move
  • Killer Heuristic
    • Mate Killers
    • Killer Moves
  • Static Exchange Evaluation
  • History Heuristic
• Selectivity
  • Extensions
    • Check Extensions
    • Recapture Extensions
    • Passed Pawn Extensions
  • Pruning
    • Mate Distance Pruning
    • Null Move Heuristic
    • Futility Pruning
    • Extended Futility Pruning
  • Reductions
    • Late Move Reductions
    • Razoring
  • Quiescence Search

Evaluation

• Material
• Piece-Square Tables
• Mobility
• Evaluation of Pieces
  • Knight Outposts
  • Trapped Bishop
  • Rook and Queen on (Semi) Open Files
  • Rook on Seventh
• Pawn Structure
  • Backward Pawns
  • Doubled Pawns
  • Isolated Pawn
  • Passed Pawns
• King
  • King-Square Tables for Opening, Middlegame and Endgame
  • King Safety
    • Castling Rights
    • Pawn Shield in Opening and Middlegame

Forum Posts#

• Chesley the Chess Engine!" released publicly by Matt Gingell, CCC, May 31, 2009
• Chesley r241 JA windows build available by Jim Ablett, CCC, July 28, 2009
• Re: undo move vs. Position Cloning by Matt Gingell, CCC, September 16, 2009 » Copy-Make
• Chesley 1.1.2 released by Matt Gingell, CCC, September 19, 2009
• Chesley engine by Mark Loftus, CCC, October 23, 2010

External Links#

Chess Engine#

• GitHub - matthewgingell/chesley: Chesley The Chess Engine!
• Chesley the Chess Engine! download | SourceForge.net
• Index of /chess/engines/Jim Ablett/CHESLEY by Jim Ablett, hosted by Kirill Kryukov
• Mac Chess Engines Repository hosted by Julien Marcel
• Chesley in CCRL 40/15

Misc#

• Chesley from Wikipedia
• Chesley (name) from Wikipedia
• Chesley Bonestell from Wikipedia
• Chesley Awards from Wikipedia
• Chesley B. “Sully” Sullenberger from Wikipedia
• 12104 Chesley from Wikipedia

References#

1. ↑ Former Vice President of the United States Joe Biden and Chesley “Sully” Sullenberger speaking with supporters at a community event at Sun City MacDonald Ranch in Henderson, Nevada, February 14, 2020, Photo by Gage Skidmore from Surprise, Arizona, Wikimedia Commons
2. ↑ Chesley the Chess Engine!" released publicly by Matt Gingell, CCC, May 31, 2009
3. ↑ chesley/README.md at master · matthewgingell/chesley · GitHub

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