Squared-chess

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squared-chess

squared-chess, (Squared-chess, ^2-chess)
an UCI compatible open source chess engine by Jost Triller, written in C++, first released in September 2018 under the MIT license . Like its successors Googleplex Starthinker and Nalwald, squared-chess is a bitboard engine and generates sliding piece attacks Kindergarten like, by looking up four pre-calculated line attack arrays, 32-Kbyte each, indexed by square and inner six bit line occupancy .

Features

Board Representation

• Bitboards
• Kindergarten Bitboards

Search

• Iterative Deepening
• Alpha-Beta Negamax
• Transposition Table
• Move Ordering
  • Hash Move
  • Internal Iterative Deepening
  • MVV-LVA
  • Static Exchange Evaluation
  • Killer Heuristic
  • History Heuristic
• Selectivity
  • Null Move Pruning
  • Late Move Reductions
  • Check Extensions
  • Futility Pruning
  • Quiescence Search
  • Delta Pruning

Evaluation

• Piece-Square Tables
• Mobility
• Pawn Structure
  • Isolated Pawn
  • Passed Pawn
• King Safety

See also

• Googleplex Starthinker
• Hactar
• Nalwald

Forum Posts

• New chess engine '^2-chess' - release 1.1.0 by Jost Triller, CCC, September 20, 2018

Re: New chess engine '^2-chess' - release 1.1.0 by Jost Triller, CCC, November 05, 2018

External Links

• Tsoj Tsoj / squared-chess · GitLab
• Squared-chess in CCRL Blitz

References

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