For the first time there is a puzzle for my games even though I was excited to see that I understood that the puzzle could have been better i.e. it was a mate in 3 but the puzzle made it mate in 1. why is that so? here's the link to the puzzle: lichess.org/training/iAgbh
<Comment deleted by user>
Probably because of the line 20...Qa1+21.Kc2Qxa2+22.Kc1Ba3#.
This means there are two good responses after pawn-takes-knight. Lichess puzzles allow for different last moves if they all lead to checkmate, but in this move Qa1+ is 'clearly' wrong (one extra move to checkmate) but still a good move, so Lichess decides to avoid the controversy and simply not turn it into a move that is part of the puzzle, hence the genius move before it also cannot be part of the puzzle.
The knight-sac was a great move, congratulations on your win!
This means there are two good responses after pawn-takes-knight. Lichess puzzles allow for different last moves if they all lead to checkmate, but in this move Qa1+ is 'clearly' wrong (one extra move to checkmate) but still a good move, so Lichess decides to avoid the controversy and simply not turn it into a move that is part of the puzzle, hence the genius move before it also cannot be part of the puzzle.
The knight-sac was a great move, congratulations on your win!
Because Lichess only features puzzles where each move is an only move, while in your game after ...Nd3+ cxd3 there are two possible winning continuations.
Every single puzzle is about to find the best move - not secondary best move. Most of them are created to have one 'good to eye' option, not many.
This topic has been archived and can no longer be replied to.