I'm not sure if this is the right place to report this. I got this puzzle lichess.org/training/68730 and in the last move I played Rh6 instead of Bd6. Then I checked with the 7-men tablebases lichess.org/analysis/standard/6k1/6p1/4r3/4bK1P/1R6/8/8/8_b_-_- and Rh6 also wins -in fact it has a smaller DTZ than Bd6. Therefore I think the problem is flawed. In endgame problems there should be only one possible winning move.
Bruh, DTZ does not stands for number of moves.. Black mates in 45 moves in the rook and pawn vs rook endgame while Black can mate in 28 moves in the rook and bishop and pawn vs rook and pawn endgame. Also Bd6 is much more an obvious win on a person's point of view rather than the still unclear rook and pawn vs rook endgame. The problem is not flawed, problem solved. After reading this please let this discussion be closed thanks.
Bruh, it is not right to say that there should be only one possible winning move in the endgame problems, as it there some problems which has 2 correct continuation but one has a faster win than the other.
@lewisbort Most people cannot win in a Rook + pawn vs rook. I hope you recognize that? But with Bd6 the extra piece is decisive
I solved the puzzle, but my puzzle rating stayed the same. Horrible!
Mentioning DTZ is irrelevant, since obviously trading the bishop for pawn will reset the counter, but trading down to theoretically won endgames clearly isn't always the best move. In fact the DTZs you mentioned are for Kg4 (a move I doubt you were considering when playing Rh6), and the tablebase only recommends Kg4 because of the unintuitive standard of DTZ. Having the extra piece is obviously much easier to play, and there's no realistic danger of evoking the 50 move rule when pawns are still on board.
I disagree. That rook endgame is pretty easy to win from a human perspective since the king is cut off And personally I think endgame studies should not be treated in the same way as normal problems since you can calculate until the end or use tablebases. In other problems there might be two answers that lead to a win eventually but you couldn't ever possibly verify that, so it's okay to only give credit to the move favoured by the computer. While it's true that the win with the bishop is easier I don't believe that playing a move that wins easily enough should be considered wrong.
Aheem, a piece is a piece, grandmasters will choose a piece up rather than that rook endgame. Plus lichess puzzles go for the best engine moves so it is probably unfair to say if you want a good move but not the best a correct one in a puzzle
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