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Ceibo is a chess engine written in C++. In order to play with it, it needs to interface with a GUI such as Arena 3.5.1 or any other UCI complaint front end. You may find it in the Downloads page.

The latest stable version is 1.0 and some of its capabilities are as follows:

• Universal Chess Interface (UCI protocol)

• Board Representation

  • Array with 64 elements

  • 8 Bitboards ( 6 for pieces & 2 for color)

• Search:

  • Alpha-Beta

  • Principal Variation Search (PVS)

  • Iterative Deepening

  • Transposition Tables (up to 8gb)

  • Syzygy Tablebases

  • Selectivity

    • Null Move Reductions

    • Futility Pruning

    • Reverse Futility Pruning

    • Delta Pruning

    • Late Move Reductions

  • Extensions

    • Quiescent search

    • Check extensions

• Move ordering:

  • Static Exchange Evaluation

  • MVV/LVA

• Evaluation

  • Tiny neural network (768x128x1)