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| May-25-18 | | malt: Looked first at 31.Q:h7+ K:h7 32.Ng5+ Kh6 33.R:f8 K:g5 Went for
<31.Q:f8+> K:f8 32.Ng5+ B:f1
(32...Qf5 33.R:f5+ )
33.N:e6+ Ke7 34 K:f1
Also looked at
31.Rf6 R:f7 32.Qf4 R:f6 33.Q:f6 |
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| May-25-18 | | gofer: Tweezy.
<31 Qxf8+ Kxf8> <32 Ng5+ ...>
32 ... Bxf1+
32 Nxe6+ Ke7
33 Kxf1 Kxe6
34 c6 +-
Black has lost.
32 ... Qf5
33 Rxf5+ gxf5
34 Nxh7+ Ke7
35 Ng5 +-
Black is 3 pawns down and has no pawns that the LSB can attack, so Kg1
will simply march into the centre of the board and from there its all over. <32 ... Ke7>
<32 Nxe6 Kxe6>
<33 c6! ...>
White offers up the rook knowing that the king cannot take Pe5. As black cannot accept all that is left is trying to stop the rook from hoovering up pawns and that is a very forlorn hope... ~~~
Yep. Too easy for a <Friday>. |
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| May-25-18 | | schachfuchs: The complete trading of all pieces leaves white with the won passed pawns c5/e5 - found that quickly.
I guess Antipov anticipated this already on move 29.Nxf7!? So, what was black's last decisive mistake? (I miss <patzer2>'s annotations) |
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| May-25-18 | | et1: The easiest Friday ever. |
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| May-25-18 | | nalinw: 27.... Bxf1 loses to
28 Qg5 - attacking the Rook and threatening mate |
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| May-25-18 | | Marmot PFL: White could go for 31 Rf6 Qe7 32 Rxg6+ hg6 33 Qxg6# but 31...Rxf7 32 Rxe6 Rf1# turns the tables. |
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| May-25-18 | | mel gibson: That was easy.
White had to get rid of that Rook or it was checkmate &
then there was a nice fork. The computer played it slightly differently.Stockfish 9 says:
31. Qxf8+
(31. Qxf8+ (♕h6xf8+ ♔g8xf8 ♘f7-g5+ ♕e6-f5 ♘g5xh7+ ♔f8-e7 ♖f1xf5 g6xf5
♔g1-f2 ♗e2-b5 ♘h7-g5 ♗b5-e8 ♔f2-g3 ♔e7-d7 ♔g3-f4 ♔d7-c6 ♔f4xf5 ♔c6xc5 h2-h4
♔c5-c4 g2-g4 ♔c4-b3 h4-h5 ♔b3xb2 h5-h6 b4-b3 h6-h7 ♔b2-a3 h7-h8♕ b3-b2
♕h8-h3+ ♔a3-a2 ♕h3-g2 ♗e8-c6 ♕g2-d2 ♔a2-a3 ♕d2-d3+ ♔a3-a2 ♕d3-e2 ♔a2-a3
♕e2-e3+ ♔a3-a2 ♕e3-a7+ ♔a2-b3) +12.13/36 73)
score for White +12.13 depth 36 |
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May-25-18
 | | Breunor: Yes got this right away, it is very rare I can get a Friday puzzle, certainly less than 1 in 10. I remember losing by running into the e5 c6 pawn structure before. |
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| May-25-18 | | TranscendentRook: the queensac was very obvious to me but i struggled a long time with 32...Qf5 as it's not a clearly winning endgame, at least to me |
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| May-25-18 | | NBZ: <al wazir>: I reckon White wins even without 35. c6. For example 35. Ke2 Kxe5 36. Kd3 Kd5 37. c6 Kxc6 38. Kc4 is winning. |
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| May-25-18 | | ChessHigherCat: 31. Rf6?? Rxf7! 32 Rxd6? Rxf1# |
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| May-25-18 | | Pasker: Ah! come on that was so easy as a Monday puzzle. I came prepared today for a complicated one but its over in a few seconds. |
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| May-25-18 | | Wallac: Too easy. |
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| May-25-18 | | ChessHigherCat: It was relatively easy for a Friday and I said so myself but: 1) how many of you guys do it all in your head, which is the only way that puzzles can reflect how you would actually play in a game? 2) how many calculate all the variations (in your head), which again is the only way you can be assured of a win in an actual game, instead of guessing the first couple moves and saying: I got it, I got it! I say that not to be pr#ck but in my case, I generally do all the puzzles up to including Wednesday in my head but I generally have to check on the board from Thursday on, and even then I rarely get Saturdays and hardly ever Sundays. Anyway, I realize that's "cheating" because you can't use a board during a real game, so I'm not too thrilled about getting the Thursdays and Fridays (although I do get a kick out of it because I couldn't even get Wednesdays just a year ago). My point, if you're wondering, is that if you think a puzzle is too easy and you're using a board, try doing it all in your head and calculating all the variants (as I plan to do one of these days, but not yet). |
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| May-25-18 | | saturn2: White has nothing better than exchange into a won endgame. |
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May-25-18
 | | al wazir: <Gilmoy: It's a (post?-)newbie pattern (and if it isn't already, then it should be).> Now that you call my attention to it, I see that c6 *isn't* the winning move -- it's not necessary. Because, as you say, black can capture neither the c- nor the e-♙ without allowing the other to promote. But I didn't see that.
At the end of the piece-swapping series of moves white is up two passed ♙s, which is ordinarily enough for a win. If they had been, say, the a- and the e-♙s or the d- and the e-♙s, I would have been sure of it. But because they were neither widely separated nor side by side, I blanked out, thinking that the black ♔ could pick them off one by one. |
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| May-25-18 | | takchess: Well Qxh7 doesnt work. It fails gloriously . |
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| May-25-18 | | sombreronegro: Seemed easy for Friday. A temporary queen sack leads to simplification with 2 pawns up. The two pawns working to control e6 and e7 is interesting though. A good pattern to keep in mind. |
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| May-25-18 | | Patriot: I may get a lot of disagreement in saying this, but I think before calculating anything you should first "take stock" in the position to see if there are any important tactical elements. Black has a lot of threats but there is also an x-ray checkmate on f1 and white has one on f8. I pay special attention to knights because they are not "line" pieces and move about awkwardly. Looking at the knight I notice the possibility of a royal fork on g5 after <31.Qxh7+ Kxh7 32.Ng5+ Kh6> but then there is that mate on f1 that should have been noticed earlier. So then I looked at <31.Qxf8+ Kxf8> which has drawn the king into an x-ray from the f1-rook. So now <32.Ng5+ Bxf1 33.Nxe6+ Ke7 34.Kxf1 Kxe6 35.c6> and we have a very well known winning K&P endgame. So, what I said above meets the demands of the tactical elements in the position. Looking at <31.Rf6> before seeing the above, seems out of order and without consideration of those elements. Yes, it does look at dealing with the threat of <Bxf1> and <Rxf7> but looking at defensive moves before considering aggressive moves based on positional elements is inefficient. It's an interesting point that <31.Rf6 Rxf7> wins for black but my focus is on what is good OTB logic. I didn't consider <32...Qf5> in the game line and wonder if that is even critical to consider. The queen is still removed but I suppose if <33.Rxf5+ gxf5> did something great like create a passed pawn for black then maybe. There I wondered if <33.Rf2> or <33.Nxh7+> was better than <33.Rxf5+>. When there is a pin like this, sometimes it is better to push your agenda somewhere else in order to gain time (not clock time) until they break the pin. |
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| May-25-18 | | Patriot: <ChessHigherCat> You make great points. Yes it's much better to do it in your head to practice visualization. As you said, you are solving more problems now through the week. :-) Along the same ideas you mentioned about how to improve OTB play, also consider this: it's important to practice how you play. OTB all you need to do is find the best move in a reasonable time (depending on time controls and criticality of position). Once you find the best move, it is a waste of time to calculate every variation and figure out how this best move will play out. At that point you just have to play the move that you know needs to be played! |
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May-25-18
 | | moronovich: Hi <ChessHigherCat> ! It took me a couple of decades to find out that by using diagrams was the best way to asses/evaluate a chess posistion(as good as possible) and to figure out long term plans.But in the long(er) complicated(often tactical) lines a board with wooden pieces was the set up that worked the best.
Later I found out that it is also how it works for a certain Vishy Anand ;) |
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| May-25-18 | | Cheapo by the Dozen: <ChessHigherCat>, I do the puzzles in my head, period, without even bothering to flip the board around to the black side when appropriate. I complain that a puzzle is bad if it's positioned as a long one, but the first few moves are obviously correct even if one doesn't see ahead to the best possible line at that point. Just the past few weeks I've had the idea of playing the first few (obvious) moves and then looking at the board at that point. I have no firm idea of how to "score" such partial solutions, which is one reason that I now post less consistently than I used to. |
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| May-25-18 | | Sniffles: I'm not seeing why black didn't resign at 31. Hoping his opponent suddenly goes airhead isn't the mark of a GM. |
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| May-25-18 | | patzer2: <shachfuchs> I've been vacationing and visiting relatives. So I haven't had as much time to analyze and post these past three weeks. However, I had a little time today to look at this Friday's puzzle game. For a Black improvement I'd start early in the opening and ditch 4...Nf6?! in favor of the popular move 4...Nc6, which according to our Opening Explorer has given Black even chances as compared to the two losses recorded for 4...Nf6?! However, all might not be lost for Black on his fourth move. Instead of 8...Qb6 9. 0-0 ⩲, Black is probably OK with 8...Nb6 = (-0.05 @ 21 ply, Stockfish 9 analysis of move 8...?). |
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May-25-18
 | | Penguincw: Easiest Friday ever. |
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Kibitzing
sac: 31.Qxf8+