Engines Can't Solve This Brilliant Puzzle!
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Published 2024-07-19
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Timestamps:
0:00 Hello Everyone
3:45 Solution (but try to solve it first!)
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All Comments (21)
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The Microsoft outage was due to someone using a supercomputer to try to analyse this to depth 100
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So Lichess at depth 70 couldn't find bishop to c7, and you gave me 5 seconds to do it??? Well played Antonio... well played.
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On Lichess the position is now analysed to depth 96 and Stockfish can see the mate in 12.
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The thresholds used for pruning and depth reduction, which allow searching incredible depths very accurately, ignores this line because it looks too crap to be worth checking. You can easily tune the engine to consider these positions, and it will solve puzzles like this almost instantly... but its overall playing strength will suffer tremendously.
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Confound it all, if only it weren't for that distracting picture of Topalov I'd have foud it at once!
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lichess on 74 depth couldn't solve it (the move wasn't in top 5), but it immediately sees #11 after the first move
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Moves provoking zugzwang are the hardest to find.
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Thanks, Agad's brother in law!
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Not sure if Agadmator has done this type of video before but already looking forward to more of these puzzle videos 🙏🏽
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Bless Agad for thinking I can find a mate in 12 when I didn’t find mate in 1 yesterday
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I ran the puzzle on Stockfish 16.1 and once you do the first bishop move, it then suddenly goes from "draw" to mate in 11. Crazy!!!
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Its a great puzzle because it has all the elements: The obvious move isn't the first move. There is a queen sacrifice. The obvious move only gets played at the right moment. A zugzwang becomes evident. A pointless pawn push ensues just to use up moves to complicate. An inevitable discovered check forces black to sacrifice material until he's mated.
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Only Tal could find such moves over the board
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If you let your engine analyse just a single line (PV) it wont find Bc7 cause of heavy pruning at the start of the search tree which is done mainly for speed. If you use the Multi-PV option Stockfish will find it. Ive played around with it a bit and SF wont find it up to Multi PV =5, but when you use Multi-PV = 6 then it finds Bc7 in about 20 seconds.
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Shout out to Gauri, he posted this puzzle many days ago . Thanks Agad for testing my memory.
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This was actually beautiful to watch. It reminds me why I love chess. It is never a straight forward game regardless of how much theory and computers advance. One new move and it opens a whole world of uncertain possibilities! Thank you for the video
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Your Brother -in law Jozarov showcases a lot of Great puzzles as well as being the Best Engine Channel on you tube Enjoy your day
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What I find interesting is that if you put in Bc7 the engine suddenly sees the win. When I first put the position in an engine, I forgot to add the a5 pawn, but it still thought that the position is a draw, until depth 36, where the solution is also Bc7. The a5 Pawn makes the position so much harder for the engine.
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Excellent puzzle, thank you
