< Earlier Kibitzing · PAGE 3 OF 3 ·
|Aug-21-15|| ||aporia: 21. ... a7-a5 won't help?|
|Aug-21-15|| ||diagonalley: hmmmm .... i went for 19.P-Q6 - as did <stst> - and (as far as i can make out) it works... with white's KB subsequently coming into play|
|Aug-21-15|| ||Ehrenfest: 21. .... a7-a5 crossed my mind as well, but then 22. ed6x and the blavk queen is overburdened. She cannot protect both a5 and b7 anymore.|
|Aug-21-15|| ||mike1: got the game continuation but am now that sure anymore. how does White win after 18. Bxc5 dxc5 19. e5 Bc6?
20 dxc6 b6 is not that clear, or?|
|Aug-21-15|| ||ajile: 21.Ra3 mates in 5. 21.Qa3 only mates in 9.|
|Aug-21-15|| ||ajile: Note: The move I picked in this line 21.exd6 also wins but is slower to the finish.|
|Aug-21-15|| ||Boerboel Guy: <mike1: got the game continuation but am now that sure anymore. how does White win after 18. Bxc5 dxc5 19. e5 Bc6? 20 dxc6 b6 is not that clear, or?>|
How about 21 Rxb6!
|Aug-21-15|| ||gofer: Compared to yesterday this is a walk in the park. Black's got a gun to
his head and white just needs to pull the trigger...
<18 Bxc5 ...>
18 ... Qxc5/Qa5
19 Rxb7 mating or winning the queen
18 ... Nh6
19 Bxa7 (Kxb7 20 Qa3+ mating)
18 ... dxc5
black cannot stop white opening up the a8-h1 diagonal for its bishop to make it
a 4 against 3 attack on Pb7.
19 ... fxe5/Na6
19 ... Bc6
20 dxc6 b6
19 ... Bc8
20 d6 exd6
21 Qa3! threatening Qxa7 mating
I imagine that black tries this last option and d6 kills him dead.
But there is an alternative.
<18 ... b5>
<19 Bxa7! ...>
19 ... Qxa7
19 ... Rb7
<19 ... Kxa7>
<20 cxb5 ...>
White has traded its bishop for three pawns and a huge pawn storm - which
looks like a win to me...
click for larger view
I thought <18 ... b5> was more fun, suicidal, but fun.
|Aug-21-15|| ||dTal: The first move is obvious, but the sequence of pawn moves is a bit tricky. I thought of d6 instead of e5 first, but actually that gives time for Black to get his B to c6 and muddy the waters a little bit, eg: 19. d6 ed 20. e5 Bc6 21. ed Qd7 May still work after Qa3 but messier. 21. Qa3 is really a star move, and illustrates the hopelessness of Black' position. I agree that this is potentially easier to see than yesterday's, as the sac of the B to open lines for such a strong attack is something I would probably do without calculating everything in a game.|
|Aug-21-15|| ||morfishine: I saw the theme but couldn't visualize the correct move-order, namely wanting to put something on <a3> too early :(|
|Aug-21-15|| ||agb2002: White has the bishop pair for a bishop and a knight.|
The black queen defends b7 and the pawn on d6 stops White's d-pawn which blocks the a8-h1 diagonal. Therefore, 18.Bxc5:
A) 18... Qxc5 19.Rxb7 Bb5 (19... Nh6 or 19... Qc8 20.Rxb8+ Q(R)xb8 21.Qxb8#; 19... Qb6 20.Rxb6 + - [Q+2P vs R+N]) 20.Rxb8+ Kxb8 21.cxb5 + - [B+2P vs N].
B) 18... dxc5 19.e5 (19.d6 exd6 20.e5 Bc6)
B.1) 19... Qxe5 20.d6 Bc8 (20... Bc6 21.Bxc6 + -) 21.d7 (21.Bxb7+ Bxb7 22.Rxb7 Qe1+ is a bit unpleasant) looks winning.
B.2) 19... fxe5 20.d6, with the double threat 21.dxc7 and 21.Bxb7+, wins.
B.3) 19... Qc8 20.e6 Bc8 (20... Bxe6 21.dxe6 and b7 is defenseless and the game over) 21.d6 Bc6 22.d7 Qc7 23.Bxc6 Qxc6 (23... bxc6 24.Rxb8#) 24.Rxb7 Qxb7 (24... Rxb7 25.d8=Q+) 25.Qxb7+ and mate in two.
B.4) 19... Bc6 20.dxc6 b6 (20... bxc6 21.Rxb8+ Qxb8 22.Qxb8#) 21.Qa3 and the triple threat 22.Qxa7+, 22.Rxb6 and 22.Qxc5 seems to win. For example, 21... Nh6 22.Qxa7+ Qxa7 (22... Kxa7 23.Ra3#) 23.c7+ Rb7 (23... Qb7 24.Ra3#) 24.c8=Q+ Qb8 25.Ra3#.
C) 18... Nh6 19.Bxa7 is disastrous.
D) 18... b6 19.Be3
D.1) 19... Qxc4 20.Bxb6 Rxb6 (20... axb6 21.Qa3+ Kb7 22.Rxb6+ wins) 21.Rxb6 axb6 22.Qxb6 Qc8 23.Qa5+ Qa6 24.Qxa6#.
D.2) 19... h5 20.c5 looks very bad for Black.
|Aug-21-15|| ||Willber G: I went for 18.Ra1 to prepare for a push of the a pawn in order to break through on the a file. I don't know if it will work.|
|Aug-21-15|| ||Hans Kastorp: <ajile: 21.Ra3 mates in 5. 21.Qa3 only mates in 9.> <aporia: 21. ... a7-a5 won't help?> Whites threat is 22.Qxa7 with following Ra3#. 21. ... a5 doesn't help because of 22.Rb6.|
|Aug-21-15|| ||thegoodanarchist: Seems like reversal week to me. Monday and Tuesday puzzles should have been switched, and this [Friday] puzzle was easier (for me) than yesterday's.|
Can't believe I got this one so quickly, or even at all, considering I am a USCF class A player and so a patzer.
|Aug-21-15|| ||chrisowen: Bid e3 in takes pawn and as way ahead bruv can win buffs |
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|Aug-21-15|| ||johnlspouge: < <ALEXIN> wrote: I thought 18.e5 ?! so missed. >|
Interestingly, nobody has yet analyzed 18.e5. Most solutions are therefore probably conditioned on solving a puzzle.
Stockfish shows that 18.e5 permits 18...Bf5, which 18.Bxc4 does not. In this case, there is a specific reason to play the sacrifice without the preparatory move.
|Aug-21-15|| ||kevin86: Black is really tied up. The center pawns and the triple forces on the b-file make the game untenable. The pressure will end this one soon in checkmate.|
|Aug-21-15|| ||beenthere240: I will remember that tactic. Simply point out to your opponent: "You are really tied up. Your pawns are weak and my lineup on the b file makes your game untenable. I suggest you resign before my pressure leads to your checkmate."|
|Aug-21-15|| ||Pedro Fernandez: It is not difficult (no more than a minute) to see that the only move to get progress is 18.Bxc5! in order to get mobility of the powerful white central pawns (which, in turns, lets to open the diagonal h1-a8 for the dangerous white bishop) since the black king is in a sort of fortress. I did continue my study by playing 18...dxc5 (Stockfish plays here 18...Qxc5) 19.e5!
click for larger view
a natural and very strong move with a few threatens and baneful consequences. But now I did play 19...fxe5? which is immensely inferior than 19...Bc8. Anyways, no doubt that a complete study after the move 18.Bxc5!
click for larger view
is quite complex and extensive.
|Aug-21-15|| ||saturn2: Today I failed. My move was 18 Qa3 threatening Qxa7. I wasted some time calculating the defences 18... a6,b6 or Rb8-any.|
|Aug-21-15|| ||ajile: <Hans Kastorp: <ajile: 21.Ra3 mates in 5. 21.Qa3 only mates in 9.> <aporia: 21. ... a7-a5 won't help?> Whites threat is 22.Qxa7 with following Ra3#. 21. ... a5 doesn't help because of 22.Rb6.>|
21.Ra3 a5 22.Qb5! and White will mate in 3 moves.
|Aug-21-15|| ||M.Hassan: "Difficult"
White to play 18.?
Trying to attack a7 square if Black does not support it
<18...e6 19.Rxa7+ Kxa7 20.Qa3#>
19.h4 e5 to provide room for Knight move
20.dxe6 Bc6 (not Bxe6)
Hoping to win a pawn on the exchange
<24.Qxc5 dxc5 25.Bxc7>
24.e5 there is a chance to win a Rook for bishop
After all the exchanges, white is equivalent of a piece (3points) up and it is time for me to check the actual game.
Nowhere near my line
|Aug-21-15|| ||Kasparov Fan: The position screams at you 18. Bxc5 got that in 10 maybe 15 seconds but Qa3 took more time and effort.All in all a good puzzle but I guess a little too easy for a Saturday.|
|Aug-21-15|| ||patzer2: Like <sts> and <diagonally>, I went for 18. Bxc5! dxc5 19. d6? as my attempted solution to Friday's puzzle.|
Unfortunately, Deep Fritz 14's analysis proves 19. d6? to be a losing try. After 18. Bxc5! dxc5 19. d6? exd6 20. e5 Bc6! (-3.49 @ 22 depth) Black snatches victory from the jaws of defeat.
Instead of 19. d6?, the game move 19. e5! (+10.52 @ 22 depth) wins as it prepares the pawn push 20. d6 with a powerful discovered attack against the vulnerable b7 square.
Black's not-so-obvious 17...Rb8?? was the decisive mistake. Instead, 17...b6 18. a4 maximizes Black's resistance.
Earlier 9...Qb6 = (or the Fritz choice 9...Nf6 =) instead of 9...Bxc3?! to should improve Black's chances.
|Aug-21-15|| ||whiteshark: Got it! After <19.e5 / 20.d6> the ♙b7 is pinned/immobile.|
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