Author: Jan Brouwer

Rotor a command-line chess engine which implements the UCI protocol so it can be used with a separate chess graphical user interface program.
It is written in C++.

Features

Rotor implements the following:

• PVS search
• 12x16 Mail-box move generator
• Attack information of all squares is incrementally updated in every node
• Quiescence search with check moves in the first ply, capture moves and check evasion moves in all quiescence plies
• Killer and history move ordering
• Transposition hash table
• Adaptive null-move pruning
• Late move reduction
• Futility pruning
• Check extension

History

0.6a	Port to Android
0.6	Major refactoring of code, several classes introduced  Mate score handling in transposition table corrected  "moves ..." after UCI command "position fen ..." now handled  Futility pruning added  Attack tables modified
0.5	Command "go nodes" added, checked in all non-quiescence search nodes  Evaluation parameters tuned  Drawish endgame material imbalances added
0.4	Mobility evaluation added  King attack batteries added  Quiescence search more selective  Null-move reduction made adaptive
0.3	Improved pawn evaluation  Improved king safety evaluation  Modified time management  Late move reduction added
0.2	Passed pawn evaluation added  Transposition table size made configurable  Tuning of evaluation weights
0.1a	Increased PV administration pool size
0.1	First released version

Rotor 0.6
Rotor 0.5
Rotor 0.4
Rotor 0.3
Rotor 0.2
Rotor 0.1a

Downloads for Android (use in combination with a GUI such as Chess for Android)

Rotor 0.6a