[whimsicalism]

Think blindfolded 1400 players, which is what this effectively is, would make illegal moves.

But even if it doesn't play like human 1400 players, if it can get to a 1400 elo while resigning games it makes illegal moves on, that seems 1400 level to me. And i bet that some 1400s do occasionally make illegal moves (missing pins) while playing otb

[throwwwaway69]

This isn't really an apt metaphor. Firstly because higher level blindfolded players, when trained to play with a blindfold, also virtually never make mistakes. Secondly because a computer has permanent concrete state management (compared to humans) and can, without error, keep a perfect representation of a chess if it chooses to do so.

[whimsicalism]

1400 FIDE !=. high level blindfolded player.