In puzzle
http://en.lichess.org/training/17819 I played 2.Nxf4 which is mate in 2 (checked with the engine)
Of course there is also a mate in 1 so a "you can do better" would be in place. I got failed result instead which IMHO is too harsh.
The puzzle is a mate in 3 with Nf3, Ne4 and Ne6 with Nh7 being a mate in 4. I tried all mating variations and they are assessing correctly.
If you mean 1. Ne6+ Kh6 2. Nxf4 there is Qg5 or Ng6 to stop the mate.
3. Nf4+ is a mate in 2.
Nf4+ isn't a mate in two, black has the queen and horse which stop the check.
You are mistaken.
You've said 2.Nxf4, and 3.Nf4+. Which is it?
Better yet, what's the exact line you're referring to? Just giving us one move 2 or 3 moves into a variation makes it difficult to fix the problem, if it's there :)
Yet another puzzle where mate in two is wrong when there is a mate in one.
http://nl.lichess.org/training/39664Tell us the exact line or you are not helping.
Why would I give you the answers to the puzzles? I started this threat to discuss a problem with the way those puzzles are programmed. Not to give you guys a free answer to a puzzle you can't solve by yourself. You don't have commit rights to lichess, I bet you don't even know how to fix the problem. You are just visitors to the forum.
Nf4+ is not work, because defended with th queen