I tried several times to play chess against it. It made reasonable if poor moves for the first 10 moves of the game. It also gave plausible-sounding if entirely incorrect explanations of why the moves were good, such as "I'm playing Nf6-g8, which is a good move because it defends my pawn on f7 [it doesn't] and controls the center, allowing me to set up an attack on your king".
At some point though, it always got stuck and insisted on making illegal moves, even when I corrected it by providing the current board position in FEN.
At some point though, it always got stuck and insisted on making illegal moves, even when I corrected it by providing the current board position in FEN.