Computer says 71....Nf4+ is a draw

I don't quite get why the graph drops to zero.

Is this a "repetition"? If so, why it was not claimed automatically as draw?

After 71. ... Nf4+, white has only 3 moves, and all three shows mate in some moves. So, clearly it is not a draw.

Game:

68 70 & (should've been) 72

(and yes, it could only have been repetition) :)

72. Kg1 was a mistake.

White evaluation changed from 0.0 to mate in 6.

I "allowed" my opponent to draw in the next move, but my move itself was not a draw. That is why it was not claimed as draw.

Had my opponent moved 72. Kh1 instead, then it would be a drawn.

--

Edited: both moves are marked with (??)

Yep. That's what I meant.

@drbeco said in #1:

> After 71. ... Nf4+, white has only 3 moves, and all three shows mate in some moves. So, clearly it is not a draw.

Nf4+ was a blunder, but then black blundered Kg1. In other words, black blundered the draw.