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< Earlier Kibitzing · PAGE 2 OF 2 ·
Later Kibitzing> |
| Jan-01-21 | | morfishine: Monday on a Friday, I'll take it |
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| Jan-01-21 | | Brenin: At the end, if 48 ... Ke7 then 49 Rg8, 50 Rg7+ and 51 Nxf6+ wins. If 48 ... Rb8 then 49 Rxa7+ R2b7 50 Rxb7+ Rxb7 51 Nd8+ wins the R. If 48 ... Rd7 then 49 Nh6+ Ke7 50 Ng8+ Kf7 51 Rf8 is a rather pretty mate. Happy 43 x 47 to you all! |
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| Jan-01-21 | | AlicesKnight: The break-in with 43.Rh8+ Bxh8; 44.Rxh8+ etc. was not too difficult, the conclusive win demonstration was a little more so. <Everett> is right about the N v B situation; fascinating. |
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| Jan-01-21 | | awfulhangover: 43.Nh6+ my choice. Cant see what is wrong. |
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| Jan-01-21 | | goodevans: <FSR> First to solve but were you still celebrating the passing of 2020 when you wrote that? We can overlook <43...Kf7 44.Nh6+> even though <43...Kf7 44.Rh7> is quicker but <44...Kf7 45.Rf8+?> is definitely suboptimal since <44...Kf7 45.Rh7+> is mate next move. Not your usual standard for sure. |
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Jan-01-21
 | | steinitzfan: I didn't get it but it but it seems like it should have been easier than it was when you see that White starts out by winning material instead of sacrificing. I was still surprised to see Black's game cave in so quickly. Those two strongly placed knights against a passive took should have been a clue. |
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Jan-01-21
| | steinitzfan: That was "passive rook" - not "passive took." |
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Jan-01-21
 | | chrisowen: Us in favor rh8+ gently axiom jewel ah goody wrong favor iv with photon beam juvenile jumpy rook i vant binary bulldog deckz its faery foots i vant band come with iv goalpost totup flung mack hobble each it wits doler favor rh8+ over? |
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| Jan-01-21 | | Brenin: After the appropriately-named <awfulhangover>'s 43 Nh6+ Bxh6 44 Rxh6 Rh7 45 Rxh7 Rxh7 46 Rxh7 Kxh7 47 Ne7 White has a clear advantage, e.g. 47 ... Bxa4 48 Nc8 and 49 Nxd6, with a protected passed pawn, but he still has work to do. The line played, retaining most of White's better-placed pieces, is much more decisive. |
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| Jan-01-21 | | Who is me: QUESTION why did black quit ??
A BEGINNER WANTS 2 KNOW! |
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| Jan-01-21 | | King.Arthur.Brazil: Even though I found the little forced sequence 44.♖h8+ ♗xh8 45.♖x8+ ♔g7 (What else can both sides play? White must go into this and Black cannot avoid it.) However, I was a little sleepy too, that's why I suppose get more time to see the disaster to Black comming from 48...♖d7 49. ♘h6+ ♔e7 50. ♘g8+ ♔f7 51. ♖f8#. It is a unusual and beautiful check-mate net, with the ♘g8 and ♖f8. Nice game! |
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| Jan-01-21 | | thegoodanarchist: At first I thought this was too easy for Friday, but then I realized my solution was wrong. |
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| Jan-01-21 | | Cheapo by the Dozen: The first couple of moves were obviously advantageous. I didn't see Nf8 at all, but the the thinks the more straightforward Re6 wins big too. |
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| Jan-01-21 | | Cellist: I thought both 43. Rh8+ and 43. Nh6+ win and opted for Nh6+, which is not as strong as the game line. It does also win because the B on d8 (after a pretty much forced exchange of Rs) is not able to protect most of Black's pawns. |
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| Jan-01-21 | | agb2002: White has both knights for the bishop pair.
Black threatens Bxa4.
White can win some material with 43.Rh8+ Bxh8 (43... Kf7 44.R1h7 and 45.Rf8#) 44.Rxh8+ Kf7 45.Rf8+ Kg7 46.Rxe8: A) 46... Rxb2 47.Nf8 (47.Rf8 Rf7) looks very good for White. For example, 47... Rf7 48.Ne6+ Kh7 49.Rc8 followed by Rxc4. B) 46... Kf7 47.Rf8+ Kg7 48.Nxf6 wins decisive material (48... Rf7 49.Ne8+ Kh6 -49... Kh7 50.Rh8#- 50.Rxf7 Rxf7 51.Nxd6). |
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| Jan-01-21 | | agb2002: I missed a mate in two after 44... Kf7: 45.Rh7+ Kg8 46.Nxf6(h6)#. |
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| Jan-01-21 | | goodevans: <Who is me: QUESTION why did black quit ??
A BEGINNER WANTS 2 KNOW!>
No need to shout. Some of us are still a bit fragile. Material may be roughly equal but black's K is in mortal danger whilst white's is perfectly safe. The main threat is 49.Nh6+ Ke7 50.Ng8+ Kf7 51.Rf8#. Black has a couple of ways to avoid that but they both end up losing quite quickly: 48...Rb8 49.Rxa7+ R2b7 50.Rxb7+ Rxb7 51.Nd8+ and 52.Nxb7 is overwhelming; 48...Ke7 49.Rg8 Kd7 50.Nxf6+ Ke7 51.Ng4 followed by f6 and Rd8# (black can only delay this with 'spite checks' but can't stop it). |
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| Jan-01-21 | | Diana Fernanda: playing carballo h6 also wins, white has more than one option to succeed, I think, finally, happy new year friends 64 crazy boxes. |
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| Jan-01-21 | | goodevans: l forgot to mention that after 48...Ke7 49.Rg8 black has to play 49...Kd7 to avoid 50.Rg7+ Ke8 51.Nxf6#. |
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| Jan-01-21 | | Brenin: <Who is me>: It's sometimes useful to check earlier postings. It's not obvious, but my first one today gave an answer to your question. |
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| Jan-01-21 | | Who is me: thank you goodevans ! |
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Jan-01-21
 | | AylerKupp: <<Brenin> After the appropriately-named <awfulhangover>'s 43 Nh6+ Bxh6 44 Rxh6 Rh7 45 Rxh7 Rxh7 46 Rxh7 Kxh7 47 Ne7 White has a clear advantage> You're right, although I think it was <Walter Glattke> who suggested 43.Nh6+ first. I originally also thought of 43.Rh8+ first but couldn't see a forced win. I then tried 43.Nh6+ and thought that this was much quicker after 43...Bxh6 44.Rxh6 and then if <Walter Glattke>'s 44...Bxg6 not 45.Rxg6+ but 45.fxg6 and mate in 2 will seemingly occur. But Black can still play 45...Re7 and delay the inevitable mate much longer.
click for larger viewBut I overlooked your 44...Rh7 when there is no forced mate. So the given solution, 43.Rh8+ is still probably still the best. Then, out of curiosity and because I'm a chess engine geek, I had Stockfish 12 analyze the initial position with (eventually) MPV=30. It seems that almost anything that White plays will win, at least according to Stockfish. At d=44 all the top 24 moves by White had theoretically winning evaluations; i.e. evaluations higher than [+2.00] with the lowest evaluation in Stockfish's top 24 moves being [+4.36] (!) And even the next top 4 moves had evaluations ~ [0.00], with the 26th best move, 43.Rh6, having an evaluation of [+0.25] and the other 3 an evaluation of [0.00].. So you had to play either Stockfish's "top" 29th and 30th moves, 43.Nf4 ([-2.25]) and 23.Nh4 ([-3.17]) respectively, until Stockfish evaluated the position as theoretically winning for Black. Perhaps it's just me but I don't consider a POTD as "Difficult" if there were 24 theoretically winning moves and 4 moves that theoretically provided even chances for both sides, at least according to Stockfish. You can almost choose a move at random and White would win, although of course some wins would be faster than others. So I think it would be more proper to elevate this puzzle's difficulty from "Difficult" to "Insane" and label it "White to play and NOT win". ;-) |
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Jan-01-21
| | AylerKupp: <<Diana Fernanda> playing carballo h6 also wins> Would you call that "Juantorena h6"? Because Alberto Juantorena, the Cuban 400/800 meter winner in the Montreal 1976 Olympics, was known as "El Caballo". |
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| Jan-01-21 | | waustad: I rejected the correct line because I was looking for something more in the mate now realm. In a real game I might have gone for it, there is no guarantee. Truth be told, I’m a lot better at seeing a future position than I am at evaluating it. |
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| Jan-02-21 | | waustad: He got to the mating net a few ply beyond what I saw. |
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Kibitzing
sac: 43.Rh8+