Clarabit

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Clarabit,
a Chess Engine Communication Protocol and UCI compatible chess engine by Salvador Pallares Bejarano, dedicated to his daughter Clara . The development of Clarabit started in summer 2006, and it was first public released in February 2008 . Clarabit executables are provided to run under Linux and Windows, 32 as well as 64 bit versions. Clarabit played the CCT9, WCRCC 2007, CCT10, and CCT11 tournaments.

Features

Clarabit is Bitboard based and applies Magic bitboards, as acknowledged to Pradu Kannan in the Readme.txt file .

Search

Clarabit's search performs and uses :

• Principal Variation Search
• Limited Quiescence Search
• Static Exchange Evaluation and MVV-LVA
• Adaptive Null Move Pruning
• Transposition Table
• History Heuristic
• Killers and Mate Killers
• Check Extensions
• Late Move Reductions

Evaluation

Clarabit's evaluation is based on:

• Material
• Mobility (Attack Bitboards)
• Piece-Square Tables
• Piece Type Positional Knowledge
• Pawn Structure
  • Pawn Hash Table
  • Doubled Pawn
  • Backward Pawn
  • Isolated Pawn
  • Passed Pawn
  • Candidate Passed Pawn
• King Safety
• Specific Endgame Knowledge

Forum Posts

• Re: Public releases? by Salvador Pallares Bejarano, CCC, January 31, 2008
• Clarabit first release by Salvador Pallares Bejarano, CCC, February 09, 2008
• Clarabit 1.00 : 2000 by Patrick Buchmann, CCC, February 11, 2008

External Links

Chess Engine

• Clarabit Chess Engine
• Clarabit in CCRL 40/15

Misc

• clarabit - Wiktionary
• Clara from Wikipedia
• Clara (given name) from Wikipedia

References

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