| Mar-25-22 | | Whitehat1963: Excellent Monday puzzle after black 63. Ka4. |
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| Mar-25-22 | | Brenin: After a minute or two trying and failing to make 29 N(either)xd5+ work I found 29 Ng6+ fxg6 30 Rg7+, e.g. 30 ... Kf6 31 R1xg6 mate, or 30 ... Ke6 31 R1xg6+ Qf6 32 Rxf6+ Kxf6 33 Qg6 mate, or 30 ... Ke8 31 Qxg6+ Nf7 32 Qxf7 mate, or 30 ... Kf8 31 Qxg6 with an overwhelming attack. This leaves 30 ... Nf7, when 31 Rxf7+ Kxf7 32 Qxg6+ looks winning, but I have no time to investigate further. |
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| Mar-25-22 | | raymondhow: Got the first move, then wanted to play 30.Qxg6 which apparently doesn't work. |
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| Mar-25-22 | | Brenin: <raymondhow: Got the first move, then wanted to play 30.Qxg6 which apparently doesn't work.> Yes, 29 Ng6+ fxg6 30 Qxg6 is refuted by 30 .... Rxg8 31 Qxg8 Ne8 or 31 ... Nf5, both moves preventing a check on g7, and the former also unpinning the Black B. In either case White is running out of ammunition, with his N unable to join the attack. |
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| Mar-25-22 | | mel gibson: I saw that first move because of the obvious royal fork
but then I looked for other moves so I can't count this one as solved. Stockfish 14.1 says:
29. Ng6+
(29. Ng6+ (♘f4-g6+ f7xg6 ♖g8-g7+
♘d6-f7 ♖g7xf7+ ♔e7xf7 ♕d3xg6+ ♔f7-e7 ♕g6-g7+ ♔e7-e8 ♖g1-f1 ♕h4-e7 ♕g7-g6+
♔e8-d7 ♖f1-f7 ♖d8-e8 e3-e4 ♗c8-b7 e4-e5 ♕e7xf7 ♕g6xf7+ ♖e8-e7 ♕f7-g6 ♖a8-e8
♘c3-e2 ♔d7-c8 ♔c1-d2) +6.52/53 320)
score for White +6.52 depth 53. |
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Mar-25-22
 | | scormus: At last I get one this week .... and the text messes it up for me. <mel> Thanks for the SF analysis. I first thought 34 Rf1, but switched as the text was Qe5+ and couldn't make it win. Moral, check the end result before starting |
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| Mar-25-22 | | agb2002: White has a knight for a bishop.
The first ideas that come to mind are Ncxd5+, to win the defenseless rook on a8, and Ng6+, to create an entry point for the queen on g6. After 29.Ng6+ fxg6 30.Rg7+:
A) 30... Nf7 31.Rxf7+ Kxf7 (else 32.Qxg6 wins) 32.Qxg6+ Ke7 (32... Kf8 33.Rf1+ and mate in four) 33.Qg7+ A.1) 33... Ke8 34.Rf1 Qe7 35.Qg6+ Kd7 36.Rf7 must be winning. A.2) 33... Ke6 34.Rg6+ and mate in two.
A.3) 33... Kd6 34.Qe5+ Kd7 35.Rg7+ Qe7 36.Q(R)xe7#. B) 30... Kf8 31.Qxg6
B.1) 31... Bf5 32.Rf1 is winning (32... Qxh3 33.Qf6+ Ke8 34.Q(R)e7#. B.2) 31... Qf2 32.Qh6 (threatens Rf1+; 32.Qh7 Qxe3+ gives Black some chances unnecessarily) B.2.a) 32... Qb2+ 33.Kd1 Qa1+ 34.Ke2 Qb2+ 35.Kf3 wins. B.2.b) 32... Ke8 33.Qh8+ Qf8 34.Rg8 wins decisive material. B.3) 31... Bxh3 32.Rg8+ Ke7 33.Qg7+
B.3.a) 33... Nf7 34.Rxd8 Kxd8 35.Qxf7 Bg4 36.Qg8+ wins decisive material. B.3.b) 33... Ke6 34.Rg6+ Kf5 35.Qe5#.
C) 30... Kf6 31.Qxg6#.
D) 30... Ke6 31.Rxg6+ Qf6 32.Rxf6+ Kxf6 33.Qg6#. E) 30... Ke8 31.Qxg6+ Kf8 32.Rf1+ Bf5 33.Rxf5+ Nxf5 34.Qf7#. |
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Mar-25-22
 | | chrisowen: Lobs duct fave it v u Ng6+ hobble it v abacus black aha it v i ramble it v lobs duct fave it v u i ask disc dactylic it v club baffle v it v bluff it v pj mp gm it wu her it v hurry it v honey it v i pack it v i yes sir lance it v i good touch buff jams howitzer it v i joked it i vociferous affable griffon flight gg flush fig blubb c it victor bow it co bad land x a v it vic hunch hat ignoble i jot bid duck gang res cv it blusher it each it v empathy it v balance ho do it v i boil v it v time it efface v it whirly caw it v fluff real knight go nt bed it sec geed it of fash it van ram c med it v c flag hive it v bud c dada cdt z it v fat c hi it vis rook ask md nn v it v i lop i ja jan c dead v its v fight hr ji z it v pint foot dad c two black it v died it v mr fight it v dose it v i fee it v hong bio dt v it v i bin foot god fin i big tod dj anna sh fozzy it vat i stark dj nash it v krazy it avant it v i shan dj it v a dud dt ufo daz it v rays jz kd shan dali rim v it v dose it v i fee it ven feeds it veo ram id it liv it Ng6+ duck! |
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| Mar-25-22 | | Cellist: I also opted for 29. Ncxd5+, eying the undefended Rook on a8 and thinking that I would have enough compensation, but this path only leads to a draw because the Black Queen can deliver a perpetual check after a R trade on g8. I was surprised to see that Duda also ended up with a draw instead of a victory. Where exactly did he go wrong? |
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| Mar-25-22 | | drollere: <Where exactly did he go wrong?> 55. Ne2 is worth looking at, instead of just advancing the R pawn. |
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| Mar-25-22 | | Cellist: <drollere: 55. Ne2 is worth looking at, instead of just advancing the R pawn.> White had to prevent mate-in-1. Either 55. Ne2 or Kc1 is necessary. The evaluation is already at 0 here. |
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| Mar-25-22 | | GlennOliver: The alternative attack, 29. Nfxd5+, ends in a Black win. As should the given line, 29. Ng6+, in today's puzzle, were it not for Duda's brilliance. |
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| Mar-25-22 | | TheaN: I was actually convinced I had a winning line in 29.Ncxd5+ exd5 30.Nxd5+ Ke6 31.Nc7+, yet this is surprisingly sturdy for Black. After 31....Kd7 32.Qc3! +- actually wins, as then the pressure builds up. 32.Nb6+ = does <not> win, and this follows the main line of this variation if Black plays the correct 31....Ke6! Now White has no sting with the queen. 32.Nc7+ Ke7 (Kd7 does in fact also draw, but this is safer) 33.Nd5+ leads to a draw by repetition, as the alternatives for White are very dangerous:
click for larger view
33.Nxa8 Rxg8 34.Rxg8 Qe1+ = hands initiative to Black, though Black has nothing better than perpetual. Significantly <worse> is 33.Rxd8? It looks like such a safe move but after 33....Bf5! -+ White collapses entirely. |
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| Mar-25-22 | | Brenin: <Cellist: I was surprised to see that Duda also ended up with a draw instead of a victory. Where exactly did he go wrong?> I think he tstarted to throw away his advantage by advancing the h-pawn (43 h4, 45 h5), which never amounted to much of a queening threat (56 ... Rxh5), when he could have been disrupting Black's attempts to mobilise his pieces by getting his Q to d6 (after 46 Qe5+, for example) and playing e4 when he had a chance (move 43, for instance). With hindsight 48 Qxa3, allowing Black to control the a-file with 49 ... Ra8, doesn't look very clever, either; 48 Nf4 might have been wiser. |
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| Mar-26-22 | | TheaN: In addition to the points of <Brenin> in the Q:2R phase of the game, Duda could have improved the transition by means of 34.Rf1! Because of Rf8#, Black is forced to play 34....Qe7 following 35.Qg6+ Kd7 36.Rf7:
click for larger view
Whilst this doesn't look much better for White at first glance, the issue for Black is piece activity. After 36....Re8 37.e4! Bb7 (else issues on d5) 38.Kd2! releasing pressure of the c-file, and now Black has nothing better than taking the material deficit: 38....Qxf7 39.Qxf7+ Re7 40.Qf5+ Ke8 41.exd5 cxd5 42.Nxb5 +-
click for larger view
And White's calling all the shots. |
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Kibitzing
