AMAZING Chess Puzzle From Reddit

Reddit post is here:

🧩 FEN:
n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w – – 0 1

πŸ‘‰πŸ½ Say hello to 1500 ELO πŸ“ˆ

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70 Comments

  1. It's not actually checkmate on the next move because black can move their queen to A5 and thus capture the bishop that would otherwise deliver the check mate.

    But it is check mate on the move after that because if white promotes to a queen then that delivers the checkmate.

  2. Why doesn't black move Q to f8? When the K moves for the check he has to move away from the pawn. The Q steps in and sacs but the king can retake and move to f8

  3. I saw it was a win for white- after I watched the video. 😊

  4. Hats off to whoever developed this puzzle! Can you imagine how much effort had to go into figuring something like this out?

  5. this puzzle was covered in a daniel naroditsky video a while while back, title of video is "how to study chess" or something

  6. That is a puzzle of a different league. Or a different tier ! OMG

  7. Black can just move the queen to F8 and then sack/defend against the check on G7, no??? Perhaps white gets the queen promotion out of it but the bishop skewer is at least thwarted

  8. That moment when the king was in a mating net with barely any adjacent pieces, preventing him from delivering checkmate, was magnificent

  9. β€žZugzwangβ€œ doesnt know the English Chess uses a German Word for Zugzwang πŸ˜€

  10. In 1995, John Nunn shortened a study by Matous to produce this position, as an engine-stumper. It's interesting that it continues to stump engines today, almost 30 years later.

  11. I don’t see why at 5:14 β€œThere’s one move” why can’t black move the queen to f8. Then when the white king moves and puts the black king in check, the queen can block and sacrifice but the king can take the bishop and the last white pawn.

  12. To answer the question at 4:52, I once checkmated by castling.

  13. I love how stockfish offers the draw and then afterwards is all like, β€œof course this is winning for white. Wasn’t it obvious?”

  14. Just to be accurate until the end: Qf8 is met by Kf5! Qg7 f8Q++ and not Kg5? Qg7+ Kh5 Ne6! -+ πŸ˜‰

  15. One of the coolest puzzles I have ever seen! Thank you for sharing and breaking this down!

  16. I saw this recently on some compilation of positions where Stockfish broke, I think the Reddit guy got it from that.

  17. 2:14 If Stockfish can see a mate in 11 from the position after White's move, then why can't it see a mate in 12 from the original position?

    7:56 and now I think I see why Ba1 at first loses; it's because of a parity condition (due to Black pushing the a-pawn).

    Holy ** this is a good one.

    8:56 Well, Black doesn't HAVE to promote to a queen … but it doesn't make a difference.

    10:10 Hats off should be even more so to the composer (who has been identified in another comment).

  18. Can you bring back the chess adventure series pls

  19. Wonderful puzzle and video. Easily equals if not surpasses your underpromotion videos. I’m a beginner but can still appreciate how mind-blowing this puzzle is on some level.

  20. Stockfish 16 NNUE finds the checkmate in 12 instantly

  21. People saying "owowo look at this puzzle stockfish can't solve" while using a browser version of it on a very low depth… Maybe next time use stockfish 16 with a proper GUI at depth 30

  22. Amazing puzzle! Thank you so much! 🀍

  23. This was truly amazing. You never fail to deliver.

  24. This is by far the most fascinating puzzle I have ever seen!

  25. Me, a 900 rated player, after hearing stockfish see no win, still pauses to have a look.

  26. Somewhere, Lelouch vi Britannia smiled and thought: "That's my school! After all, if the king doesn't move, then his subjects won't follow".

  27. This is THE best chess puzzle I've ever seen 🀩🀩
    Thank you very Nelson for bringing this up!

  28. The magical game of chess!!
    Nobody will see this winning: not Carlsen, not Stockfish!! If you haven't seen it before…
    Even the Stockfish algoritm could not predict the Bishop move to b2!!

  29. What happens if black checks with f2 and take the bishop?

  30. what about qa3 at 10:54??? Please someone answer this fast…I am getting very annoyed

  31. This puzzle 🧩🧩 looks great for beginners in chess β™ŸοΈβ™ŸοΈβ™ŸοΈβ™ŸοΈβ™ŸοΈ

  32. What about chess adventure series???? Nelson

  33. When you first move bishop to b2, what’s stopping queen to f2 check, then take the bishop?

  34. 9:55 What about Qf8? White king moves, but black queen can block the check with Qg7.

  35. Bishop B2 is the only winning move because black can push the pawn and you can position the bishop between a1 and b2 without being attacked. If bishop goes to a1 you will get attacked by the pawn and black can deflect the bishop

  36. When complaining about Stockfish, you need to understand: 1. It will find the solution if you increase the number of "lines" to 6 or more. In puzzles like this, more DEPTH does not help, it needs more BREADTH. If you limit the number of lines too much, it will cause too agressive dead branch elimination (i.e. it will quickly discard stupid looking moves). 2. Even with the default settings, if you show the solution to Stockfish, and then undo your move and analyze the same position as before, it will "remember" the correct move. 3. Stockfish vs. Stockfish lite doesn't matter. All engines use similar optimization techniques in order to come up with a result before the end of the universe. 4. No, this cannot be universally "fixed", because sometimes more breadth is better while other times more depth is better, and engines need to compromise because of limited resources.

  37. I thought of something, have no idea if this idea would work or not, @10:00 in the video, if it's blacks turn, why doesn't queen to f8 work? King would have to go to 5th rank, then maybe g7 for queen? I have no idea if that would work, I am no pro at chess by any means.

  38. 7:42 What if they play Qf8?
    If we move our King on any legal move we lose because we can't go to e6.
    If we could go to e6 he will play Qg7 we take it and they take back and we move to e7 and get a Queen.
    Please don't get me wrong. Just understand and you will get it.

  39. Stockfish also finds the move if you expand the search until Bc7 comes onto the analysis screen as one of the candidates.

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