| Aug-18-15 | | Nerwal: 20. ♗g6? ♗a8! : punch - counterpunch
29. b4? ♖xf2! : knock-out (did White miss 30. ♖e8+ ♕xe8 31. ♕xe8+ ♖f8+ or she had just enough ?) |
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Oct-11-16
 | | Phony Benoni: OK, I think I've got this one: <29. .Rxf2>, the main line being <30.Re8+ Qxe8 31.Qxe8+ Rf8+ 32.bxc5 Rxe8>, with a rook up. 30.Rxf2 Qxf2+ and mate next move.
30.bxc5 Rxf1+ 31.Kg2 Qf2+ 32.Kh3 Qf5+, trading queens up a rook. If something like 30.Re1 fleeing the take with double check, 31...Re2+ wins the queen. |
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| Oct-11-16 | | dfcx: The focus is on f2. Black can take with bishop, rook or queen. 29...Qxf2 30.Rxf2 is ruled out right away.
29...Bxf2+ 30.Kh1 wins a pawn and saves the bishop, not bad. 29...Rxf2 30.Rxf2? Qxf2+ 31.Kh1 Qg1#
or
29...Rxf2 30.bxc5 Rxf1+ 31.Kg2 Qf2+ 32.Kh3 Qf5+ 33.Qxf5 Rxf5 wins with the extra rook. |
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| Oct-11-16 | | patzer2: Took me a while to find today's Tuesday 29...Rf2! puzzle solution. That's because it involves the defensive discovered check tactic 30. Re8 Qxe8 31.Qxe8+ Rf8+ 32.bxc5 Rxe8  pointed out by <Phony Benoni>. It also creates the offensive threat 30. bxc5 Rxf1 31. Kg2 Qf2+ 32. Kh3 Qxc5 . |
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| Oct-11-16 | | saturn2: After 29..Rxf2 one has also to consider 30 Qa8 |
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| Oct-11-16 | | agb2002: Black has a bishop for two pawns.
White threatens Re8+ and bxc5.
The convergence of three pieces on f2 suggests 29... Rxf2: A) 30.Re8+ Qxe8
A.1) 31.Qxe8+ Rf8+ 32.bxc5 Rxe8 33.cxb6 axb6 - + [R vs P]. A.2) 31.Qc4+ Qf7 32.Qxf7+ Rxf7+ 33.bxc5 Rxf1+ 34.Kxf1 bxc5 - + [R]. A.3) 31.Qd5+ Qf7 32.Qd8+ Kh7 33.Qd3+ g6 34.bxc5 Rxf1+ 35.Qxf1 Qxf1+ 36.Kxf1 bxc5 - + [R]. B) 30.Rxf2 Qxf2+ 31.Kh1 Qg1#.
C) 30.bxc5 Rxf1+ 31.Kg2 Qf2+ 32.Kh3 Qf5+ 33.Qxf5 Rxf5 34.c6 Rc5 - + [R vs P]. D) 30.Rd1 Rd2+ 31.bxc5 Qf2+ (slower is 31... Rxd1+ 32.Qe1 -32.Kg2 Qf1#- 32... Rxe1+ wins) 32.Kh1 Qxh2#. E) 30.Qa8+ Kh7 31.Qe4+ g6
E.1) 32.Re7 Qxe7 (32... Bxe7 33.Rxf7) 33.Qxe7+ Rf7+ 34.bxc5 Rxe7 as in A.1. E.2) 32.bxc5 Rxf1+ as in C. |
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| Oct-11-16 | | YouRang: Tuesday 29...?
click for larger view
The convergence of forces on Pf2 was a bit of a blinking red light. Usually, one begins captures with the least valuable piece, which would be the the bishop in this case -- especially since that bishop is currently under attack. However, things change if the less valuable piece happens to have a direct line to the opposing king, and that's the case for this bishop. Furthermore, capturing first with the rook forms a murderous R+Q battery right next to white's king. So, I begin by taking with the rook: <29...Rxf2>
click for larger view
Here's where the bishop's diagonal at the king and the R+Q battery pays off. - Take the bishop? Get hit by th battery: 30.bxc5 Rxf1+ winning the exchange with sustained attack. - Take the rook? Get killed by the bishop: 30.Rxf2 Qxf2+ 31.Kh1 Qg1# - Give check with the rook? Get hit by both: 30.Re8+ Qxe8 31.Qxe8+ Rf8+ 32.bxc5 Rxe8 |
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| Oct-11-16 | | sfm: opponent. |
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| Oct-11-16 | | sfm: The ice-cool 20.Bg6,Ba8! must have sent shivers down the spine of White. -,Qb7 is an obvious threat. What is much less obvious is what to do about it, as it turns out that White can not put any blocker on the a8-h1 diagonal. So what to play instead of 20.Bg6, to counter the black build-up? Again it is not easy. 20.Be2, to play Bf3 is answered by the nasty 20.-,Rd2. So it would have been nicer if White instead had played 19.Rad1 instead of 19.Rae1. What that the last chance? So, should we write 18.-,Nf6!! , as a deep move that prevents Bd3-e4, assists in the control the a8-h1 diagonal, and leaves with with a narrow path that is easy to miss? I don't know, I may have missed the world - but still I sit with a feeling that Kateryna Lahno indeed is one nasty |
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| Oct-11-16 | | diagonalley: hmmmm.... don't usually have to look quite so deep to solve a tuesday... (took me some ten minutes to spot it) |
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| Oct-11-16 | | schachfuchs: Got that very fast - or even too fast as I completely omitted 30.Qa8+. Without the air hole (Luftloch) h7 winning would get rather illusive... |
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| Oct-11-16 | | et1: doable. |
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| Oct-11-16 | | clement41: The obvious focal point of black's forces is f2. Also is to be noted that if Black manages to trade queens she gets an easily winning endgame, activating the Rh8, and that given white's harmony and threats against black's king, a violent solution is required.
A quick look shows that starting with 29...Bxf2+? leads nowhere after 30 Kh1 (30 Rxf2?? Qxf2+ 31 Kh1 Qxh2#) However, 29...Rxf2! is a killer blow in all lines: A) 30) Rxf2?? Qxf2+ 31) Kh1 Qf1#
B) 30) bc Rxf1+ 31)Kg2 Qf2+ 32) Kh3 Qf5+ 33) QxQ (moving the K would hand even more initiative to black) RxQ 34) cb ab 35) Rxb6 Kh7 activating the Rh8 is enough to win; white pawns will start falling like flies C) the most interesting line: 30) Re8+ Qxe8!! rather hard-to-see because backward and the queen gives itself 31) QxQ+ Rf8+! the point. Black uses a counter-check (like in this Fischer-Sherwin game at move 31: Fischer vs J Sherwin, 1957 32) bc Rxe8 33) cb ab and the endgame is won Another interesting tactical moment in this game is in case of 22...Nxe4 I presume, with lines such as 23 Nxd8 Ng5 to analyze |
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| Oct-11-16 | | mel gibson: Was this a blitz game?
White should never have played
29 b4
There was no point in attacking the bishop.
The best move was
29 R-e8+ |
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| Oct-11-16 | | zb2cr: 29. ... Rxf2 does it.
If 30. Rxf2, Qxf2+; 31. Kh8, Qxh2#.
If 30. Re8, Qxe8!; 31. Qxe8+, Rf8+; 32. bxc4, Rxe8 and Black is ahead by a full Rook. |
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Oct-11-16
 | | steinitzfan: I'm going to give myself credit for this one but making the variations airtight makes this one -- well let's just say not Tuesdayish. |
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| Oct-11-16 | | patzer2: White's 20. Bg6?! was a cute but flawed tactical maneuver. If 20...fxg6?? (diagram below)
click for larger viewWhite wins with 21. Qxe6! (not 21. Nxg6+? Kg8  ) 21...Qxe5 22. Rxe5  (+7.14 @ 21 depth, Deep Fritz 15). The problem with the tempting 20. Bg6?! is Black doesn't have to take the bait with 20...fxg6?? and lose to 21. Qxe6! . After 20. Bg6?!, Black stands better by declining the offer and playing the game continuation 20...Ba8! 21. Nxf7 (White has nothing better) 21...Qb7  (-1.07 @ 22 depth, Deep Fritz 15). So instead of 20. Bg6?!, allowing 20...Ba8! , what should White play? The positional move 20.Qh5 looks solid as play might go 20. Qh5 Kh8 21. b4 Be7 22. Qf4 Bd6 23. a3 a5 24. Qc4 = (0.11 @ 21 depth, Deep Fritz 15). P.S.: Black's strong defensive move 20...Ba8! might make for a good Saturday or Sunday puzzle solution. |
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| Oct-11-16 | | patzer2: <Mel Gibson> You're correct in noting 29. b4??, allowing 29...Rxf2! , was a decisive blunder. After 29. Re8+ Bf8 30. Qe3 Rd6 (-1.36 @ 24 depth, Deep Fritz 15), Black maintains an edge. But finding a win as a human player with the clock ticking would be very difficult. |
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Oct-11-16
 | | paulalbert: As I was working the variations out on this one, like <clement41> I also recognized the similarity to the Fischer-Sherwin 1957 game which I remember well, seeing it shortly after it was played, and later knowing both the participants. |
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| Oct-11-16 | | kevin86: Sudden death! |
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| Oct-11-16 | | patzer2: <sfm: The ice-cool 20.Bg6,Ba8! must have sent shivers down the spine of White. -,Qb7 is an obvious threat. What is much less obvious is what to do about it, as it turns out that White can not put any blocker on the a8-h1 diagonal.> Good observation! However, after <the ice-cool 20.Bg6,Ba8!> 21.Nxf7 Qb7, the first player must attempt to block the long, White square diagonal. Even though the defense seems almost hopeless, it's the only way White can secure slim drawing chances. If 22. Be4, Black gets a near decisive edge with 22...Qxf7 to (-1.34 @ 28 depth, Deep Fritz 15) as in the game. If 22. Re4, Black secures a near winning advantage after 22... Nxe4 23. Nxd8 Ng5 24. Nxb7 Nxh3+ 25. Kg2 Ng5 26. f3 Bxb7 to (-1.42 @ 23 depth, Deep Fritz 15). |
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| Oct-11-16 | | Cheapo by the Dozen: I got this, but it took me at least three tries before I saw how ... Qxe8+ defangs Re8+. Depending on the time control, I could easily have missed this over the board. |
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Kibitzing
