NG-play,
a relatively simple, open source chess engine by George Georgopoulos, compliant to the Chess Engine Communication Protocol and written in C. NG-play uses a 10x12 board, and performs a negamax alpha-beta search with iterative deepening, LMR, futility pruning and null move pruning. Evaluation considers material and mobility in a first pass, and focuses on king safety in the middlegame, as well as passed pawn evaluation in a second pass 1. The engine was written from scratch, the XBoard and opening book code inspired by Tom Kerrigan's TSCP. Bruce Moreland is credited since his programming topics site 2 helped in writing the code to collect the principal variation 3.
Development History
- From version 8.0, search algorithm changed to NegaScout
- From version 9.0, a simple transposition table scheme is used
Forum Posts
- A not very recent Greek chess engine by Ruxy Sylwyka, CCC, December 03, 2012
- Author of NGplay_61 should give credit to tscp by User923005, OpenChess Forum, December 05, 2012
- new chess computer: CT800 by Rasmus Althoff, CCC, September 05, 2016 » CT800
- NGplay 9.87 64-bit released by Graham Banks, CCC, February 25, 2017