Crystal chess engine

Stockfish Polyglot is the Stockfish chess engine with the ability to read Polyglot files, also known as bin books, and it can read up to four of them.

Chess engine: Crystal 6 PMT (Stockfish derived) : u/ChessEngines

Chess egnine: Crystallite 1.1a (a simple modification of Crystal 3.1)

CF-EXT 161120 wins Android Chess - Chess Engines Diary

anti-engine puzzles : r/chess

Crystal 051220 wins JCER Test new engines, 2020.12.05 - 2020.12.06

Chess engine: Crystal 060622 Tactical

Tamerlane Chess Set

DGT Centaur + Carrying Bag - New Revolutionary Chess

Crystal Ball Feature - ChessUp Knowledge Base

CEDR (Chess Engines Diary) Tournament - 2022 - Page 32 - OpenChess