Dumb

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Dumb,
a simple and stupid UCI compliant open source chess engine by Richard Delorme, written in the D programming language, released in June 2017 under the MIT License. Dumb is a dumbed down version of Amoeba with just a basic evaluation function and basic search algorithms. Its purpose is to be a benchmark for weak engines ¹.

Features

²

Board Representation

• Bitboards
• Hyperbola Quintessence and Rank Attacks
• Mailbox
• Legal Move Generation

Search

• Iterative Deepening
• Aspiration Windows
• Principal Variation Search
• Transposition Table
• Quiescence Search
• Check Extensions
• Null Move Pruning
• Move Ordering

Hash Move

MVV/LVA

Evaluation

• Material
• Tapered Eval
• Piece-Square Tables
• Tempo

See also

• Amoeba

Forum Posts

• Dumb 1.0 UCI by Richard Delorme by Norbert Raimund Leisner, CCC, September 27, 2017

Re: Dumb 1.0 UCI by Richard Delorme by Richard Delorme, CCC, September 27, 2017

• Dumb 1.1 for Windows by Norbert Raimund Leisner, CCC, March 09, 2018
• Re: very small bitboard move/attack generator by Richard Delorme, CCC, October 30, 2018
• dumb 1.3 by Richard Delorme, CCC, January 22, 2019
• Making dumb dumber by Richard Delorme, CCC, March 03, 2021

External Links

Chess Engine

• GitHub - abulmo/Dumb: A simple & stupid chess program

Misc

• dumb - Wiktionary
• Dumb from Wikipedia
• Nirvana - Dumb (1993), YouTube Video

Watch on YouTube

References