[DSMan195276]

Personally I think the illegal moves are irreverent, the fact that it doesn't play exactly like a typical 1400 doesn't mean it can't have a 1400 rating. Rating is purely determined by wins and losses against opponents, it doesn't matter if you lose a game by checkmate, resignation, or playing an illegal move.

That's not to say ChatGPT can play at 1400, just that that playing in an odd way doesn't determine its rating.

[throwwwaway69]

This is like saying I play at a 2900 level if you just ignore all the times I lose.

[DSMan195276]

No it's not, we're not ignoring losses or illegal moves at all, they are counted as losses and that's how you arrive at 1400.

It's a (theoretically) 1400 player which plays significantly better then 1400 when it knows the lines, but makes bad or illegal moves when it doesn't, and that play averages out to be around your typical 1400 player. Functionally is just what a 1400 player already is, but with higher extremes and lower lows.

[vidarh]

The article does not ignore the losses. In fact, it used a rule stricter than FIDE rules to trigger losses on illegal moves.