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Checkmates in less than minimum moves counts as puzzle failed.

If there is a puzzle with say checkmate in 3, but you instead manage to do it in 4, you get a puzzle failed. I think this is what the analysis counts as "not the best checkmate sequence".

I think that when you're about to do such a move, you should get "Good move, but there are better ones" instead of a puzzle failed.
agreed. I have gotten the "puzzled failed" too many times to count and the move I made was pretty decent.

So frustrating....
If you sequence is less than 2 or 2 longer than the best sequence, you should not get a puzzle failed, rather a 'good move but there is better'. Could you please provide an example?
I found the puzzle that made me start this thread and it turns out my mate was 3 steps longer than the best sequence. My gut feeling is that I've gotten a puzzle failed when it has been less than that, but I'm probably wrong then if it's programmed with a threshold at 2.
I'm bumping this thread because I found a puzzle where the checkmate in one move more than optimal counts as a fail.

http://en.lichess.org/training/6710

The final move is Rg1#. But if you instead do Ra2+ there is Rg1# the next move. Doing this counts as a fail as I said. I think it should say 'good move but there is better'.

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