I had to solve this problem on tactics trainer :
fr.lichess.org/training/44971On the very last move, you have to chose between four different squares. It's obvious than one of them lose immediatly. The three others are perfectly fine but if you chose the h8 square (wich is perfectly fine) the computer says that this is a bad move. It sucks. This has nothing to do with tactics. And It's not the only puzzle like this.
By the way, when I said h8 I meant a1. Also, the sequence of moves to get the position I'm talking about is this one :
1... Ka2 2.Rf2 Nd3+ 3.Kd2 e1=Q+ 4.Kxd3+ Qxf2 5.Nxe4 Qxa7 6.Nc3+
This one also :
fr.lichess.org/training/9441...Rh8 2.Qg7 Rg8 3.Qxf6 Kxf6 4.Rxd6+ Qxd6 5.Rxd6+
and here, if I play Kg7 or Kg5 The computer says that this is wrong even if there is NOTHING WRONG with those replies.. exept maybe from a strategic point of vew but this is NOT the point of the tactic trainer. Those kind of move should be remove from all the puzzles concerned.
@Tonalli-T Iv looked at the first puzzle and I think that if the king goes to the corner I think it is just not the best move. now I know it is still winning but as a principle don't put it in the corner. But yes I do agree with you, this puzzle is flawed since my chess engine is saying that it is all winning as long as you don't take the pawn
@Tonalli-T yes the second puzzle aswell is flawed. tactically it is okay but strategically the king should go in the middle but as you are completely crushing anyways it shouldn't matter. Both puzzles are flawed!
Yes you are right, I didn't go to the corner in the first puzzle but I still wanted to check the others replies.. ended up seeing that the puzzle was flawed. Sadly I went wrong on the 2nd puzzle and when I checked out the moves with the computer I've realized that my replie wasn't a bad move and I was very frustrated. Anyway, that's not a big deal. :-)
Kb3 is mate in 26, and is marked as correct. Ka1 is mate in 24 and is marked as incorrect.