| Dec-15-18 | | TeaChess: Moves before 33. are forced. Bd3 is still a challenge, wonder if I can find it OTB. A journey 90% finished. |
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| Dec-15-18 | | Walter Glattke: 33.-gxh4!? 34.Rh7+!? Kg5 35.Rh5+!? Kxf6 36.Rxa5 Rxa5 was draw |
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| Dec-15-18 | | ChessHigherCat: I had to use a board but it seems relatively easy because so many moves are forced: 26. Qxd4 exd4 27. Re7+ Kh8 28. Nf6 Bg7 29. Re8+ Bf8 30. Rxf8+ Kg7 31. Rf7+ Kh6 32. h4 g5 33. h5 Qf5 34. g4 and the white Q can't stay on the diagonal so Qxf6 35. Rxf6+ Kg7 36. Rg6+ Kh7 37. Rg8
and black is dead in the wawa |
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| Dec-15-18 | | TeaChess: Engine suggests 32.Ng8+, better than h4. |
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| Dec-15-18 | | nalinw: Man!! I got
26. Qxd4 quickly - saw the R+N mate - even saw the Bg7 try and the back rank check. However, didn't see the long term mating net despite Black's increasingly desperate struggles ... great stuff |
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| Dec-15-18 | | ChessHigherCat: Damn, my line with 33. h5 is a draw. I had to play 33. Bd3 instead. And that's why you're dead Agent Starling! |
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Dec-15-18
 | | An Englishman: Good Evening: Not even close. Amazing combination. |
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| Dec-15-18 | | nalinw: <Walter Glattke> Stockfish says mate in 7 after 33... gxh4
34 Ng8+ |
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| Dec-15-18 | | Whitehat1963: WOW!! |
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Dec-15-18
 | | Check It Out: I got guess the move through 33...Bf5, but did not see 34.Ng4+. Lots of fun! |
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| Dec-15-18 | | schachfuchs: Me too, I got the first move but then not much more! Pretty good stuff for a 'very difficult' saturday! Did white even calculate this combination upon 25.Nxh7+ ?? |
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Dec-15-18
 | | scormus: nice puzzle and great vision by Siles. Once you've seen the Q-sac it's not difficult to get up to move 32 but then the way diverges. I went with the game line which looked the most likely, if not the optimal moves |
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| Dec-15-18 | | frogbert: Very difficult? |
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| Dec-15-18 | | NBZ: I had the game solution till 31. ... Kh6, but after 32. h4 g5 I only considered 33. h5 Bf5 when I could not find a good continuation. So instead my solution goes with 32. Ng8+ Kh5 33. Be2+ which looks totally winning (because of 33. ... Kg5 34. f4+ Kh4 35. g3+; or 33. ... Bg4 34. Nf6+ and Black is still stuck in the mating net). |
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| Dec-15-18 | | Cheapo by the Dozen: This is one of those positions that's easier to get right in speed chess than at classical speeds. Fortunately, I was in a bit of a hurry as I tackled the puzzle. :) |
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| Dec-15-18 | | devere: Nice combination! And of course 32.Ng8+ is a bit better than 32.h4 which was played in the game. |
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Dec-15-18
 | | PawnSac: well, first of all, the final solution was 15 moves in from the Q sac, and I'm sorry, but not even Garry or Magnus will see the complete end from the sac. This is one of those positions where I saw the sac very quickly, and can easily calculate up to 31...Kh6 in my head, but then there are several possibilities at that point, so just get a really clear visual of that position in my head, focus on the white pieces swarmed around the seriously exposed black K, and intuitively know there MUST be a mate from there (or at the very least, a repetition), so launching the sac is a no brainer, but work out the best path to mate after arriving at move 31. One has to trust his instincts (not blindly but..) backed up by strong indicators and good positional judgment. Every Russian School boy will tell you that if you have a rook plus or more around the enemy king, there HAS to be a win there somewhere! In general, if you can't see it clearly, just go for it. If you fail, then study the position and learn where your mistakes were, and correct them in training. NEXT time it will work! |
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| Dec-15-18 | | 5hrsolver: This worked for me. Got the first few moves but had to work out the win with a chessboard. Of course I might have gone wrong somewhere. 26. Qxd4 exd4 27. Re7+ Kh8 28. Nf6 Bg7 29. Re8+ Bf8 30. Rxf8+ Kg7 31. Rf7+ Kh6 32. Ng8+ Kh5 33. Be2+ Bg4 34. Nf6+ Kg5 35. Nxg4 Rh8 36. f4+ Kh5 37. Nf6+ Kh6 38. g4 g5 39. Bd3 gxf4 40. h4 followed by 41.Ng8+ and 42. Rh7# |
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| Dec-15-18 | | saturn2: I saw
26. Qxd4 exd4
27. Re7+ Kh8
28. Nf6 Bg7
29. Re8+ Bf8
30. Rxf8+ Kg7
31. Rf7+ Kh6
Then I deviated with 32. Rh7+? and gave up looking for mate after a few further moves. |
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| Dec-15-18 | | agb2002: White has a rook for a bishop.
Black threatens Kxh7.
The pawn on e5 stops Re7+. This suggests 26.Qxd4: A) 26... exd4 27.Re7+ Kh8 28.Nf6 Bg7 (due to Rh7#) 29.Re8+ Bf8 30.Rxf8+ Kg7 31.Rf7+ Kh6 (31... Kh8 32.Rh7#) 32.h4 g5 33.Bd3 (threatens Rh7# and makes c5 available to the rook on c1) A.1) 33... Bf5 34.Bxf5 looks winning (34... Qxf5 35.Ng8+ Rxg8 36.Rxf5 decisive material). A.2) 33... gxh4 34.Rh7+ Kg5 35.Rc5+ Qxc5 36.Ne4+ and 37.Nxc5 seems to win decisive material B) 26... Qxe1+ 27.Rxe1 exd4 28.Re7+ Kh8 29.Nf6 Bg7 30.Re8+ Bf8 31.Rxf8+ Kg7 32.Rf7+ ends up a knight ahead. -----
Another option is 32.Ng8+, instead of 32.h4. For example, 32... Kh5 (32... Kg5 33.f4+ looks winning) 33.Be2+ Bg4 (else g3+ or f4+ create a mating net) 34.Nf6+ Kg5 35.f4+ Kxf4 36.Nxg4+ Kg5 37.g3 looks also winning. |
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| Dec-15-18 | | patzer2: Like most other posters here, I was able to compute today's Saturday (26. ?) puzzle solution for the initial six moves 26.Qxd4 exd4 27.Re7+ Kh8 28.Nf6 Bg7 29.Re8+ Bf8 30.Rxf8+ Kg7 31.Rf7+ Kh6 (diagram below)
click for larger viewHere (diagram above) I considered three candidate moves 32. Ng8+, 32. h4 and 32. f4. Stockfish 10 at 42 ply indicates these three are among its four best moves: 1. 32. Ng8+ (mate-in-19)
2. 32. Rf1 (+11.23 @ 42 ply)
3. 32. h4 (+10.89 @ 42 ply)
4. 32. f4 (+10.30 @ 42 ply)
I settled on 32. Ng8+ +-, but I now think 32. h4 +- is the better practical choice because it's a bit easier for a human to compute. P.S.: So where did Black go wrong?
According to Stockfish 10, the decisive error was 19...Nxd5? 20. Nxd5 + (+2.45 @ 30 ply). Necessary instead was 19...Rf7 20. d6 Nfe6 21. dxc7 ± (+0.92 @ 29 ply). Earlier in the opening, instead of 13...Nf4 14. Bf1 ⩲ (+0.36 @ 25 ply), I prefer 13...Nf6 = (+0.09 @ 27 ply) as in the drawn game Team White vs Team Black, 2015. |
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| Dec-15-18 | | agb2002: I missed 35... Kg6 in my line A.1, when White loses a lot of advantage but it still is probably winning. |
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| Dec-15-18 | | mel gibson: <PawnSac: well, first of all, the final solution was 15 moves in from the Q sac, and I'm sorry, but not even Garry or Magnus will see the complete end from the sac. > Not even Stockfish 10 can find a quick checkmate
after a lot of processing time.
I saw 26 Qxd4 & the next 2 moves very quickly
but I couldn't see how to finish it.
Stockfish says that Black should reply with 26...Bc8-e6.
That opens up the back rank for the Rook on a8 to help. Taking the Queen 26... exe4 is a mistake.
Stockfish 10 analysis:
26. Qxd4
(26. Qxd4
(♕d1xd4 ♗c8-e6 ♕d4-d6 ♔g7xh7 ♕d6-e7+ ♔h7-h8 ♕e7xe6 ♗h6xc1 ♖e1xc1 ♕a5xa4
♕e6xg6 ♕a4xc4 ♕g6-h6+ ♔h8-g8 ♖c1xc4 ♖a8-a1+ ♖c4-c1 ♖a1xc1+ ♕h6xc1 ♔g8-f7
♕c1-b2 ♔f7-e6 ♕b2xb7 ♔e6-d6 ♕b7-f7 e5-e4 ♕f7-c4 e4-e3 ♕c4-d4+ ♔d6-e6
♕d4xe3+ ♔e6-d5 ♕e3-d3+ ♔d5-c5 ♕d3-e4 ♔c5-d6 ♕e4-d4+ ♔d6-c7 ♕d4-e5+ ♔c7-b6
h2-h4 c6-c5 g2-g4 ♔b6-c6 g4-g5 ♔c6-b6 ♕e5-e4 ♔b6-b5 g5-g6 ♔b5-b6 g6-g7)
+62.52/33)
score for White +62.52 depth 33. |
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| Dec-15-18 | | AlicesKnight: Interesting - pleased to find the Q sac and the first 3-4 moves in - less clear what would happen then but looked good. |
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| Dec-15-18 | | Mendrys: <TeaChess: Moves before 33. are forced. Bd3 is still a challenge, wonder if I can find it OTB. A journey 90% finished.> 34. Ng4+ would have been the most difficult for me to find OTB. I likely would have tried something like 34 Bxf5 Qxf5 35. Ng8+ Kg6 36. Rxf5 Kxf5 37. Ne7+? with a much more difficult road. I'm not trying to be too self-deprecating but finding moves like 34. Ng4+ in a position like that is a weakness of mine. |
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Kibitzing
sac: 26.Qxd4