Stockfish can play a pretty convincing ~1200-1400uscf game. (At least for that rating range 30 years ago.) It won't start making egregiously dumb moves until it

Stockfish can play a pretty convincing ~1200-1400uscf game. (At least for that rating range 30 years ago.) It won't start making egregiously dumb moves until it's in the "If I were a person I'd resign, but I'm a computer so here take all of my material before you checkmate me" phase, though many of its opening choices are obviously third- or fourth-best.