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Later Kibitzing> |
| May-22-09 | | outplayer: I like 11...Be7. What do you think of it? |
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| May-22-09 | | RandomVisitor: After 15...Qd6
click for larger view
<[+3.89] d=16 16.Ne4> Qe7 17.Rxc5 Rxc5 18.Nxc5 0-0 19.Nd3 Kg7 20.Rc1 Rb8 21.Nf4 Bg6 22.b3 Qd7 23.Qc3 [+1.56] d=16 16.Nxd5 exd5 17.b4 Bxf2+ 18.Rxf2 Rxc1+ 19.Qxc1 Kf8 20.Qc5 Qxc5 21.bxc5 Ke7 22.Bxd5 Rb8 23.e4 Bg4 24.Kg2 Be6 25.c6 Rc8 [+1.20] d=16 16.b4 Bxb4 17.Nb5 Bxd2 18.Nxd6+ Kd7 19.Rxc8 Rxc8 20.Nxc8 Kxc8 21.Rd1 Bb4 22.Bf3 Bxf3 23.exf3 Kd7 24.Rb1 a5 25.Kf1 Kd6 26.Ke2 h5 27.f4 e5 |
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| May-22-09 | | randomsac: I started trying to force Nxf6 and it all went downhill from there. For some reason, I didn't even look at Rxd5+ as the initial move. Oh well, there's always tomorrow (or more likely for me next week). |
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| May-22-09 | | johnlspouge: Friday (Difficult):
M Tauber vs Bachmayr, 1991 (20.?) White to play and win.
Material: N for B. The Black Kd7 has 2 legal moves, both on the 8-th rank. The Black Bh5 is subject to a fork with Ne4xf6+, creating a burden for Qe5. The White Rd1 pins Pd4 to Kd7, so Ne4 is under no immediate threat. The White Rc1 attacks Rc8, which Kd7 and Rh8 protect. If Kd7 were forced to the 8-th rank, Rc1xc8+ might become a decoy or capture of a loose piece. The White Qb4 steals the a3-f8 diagonal from Kd7 and has checks Qa4+ and Qb5+. The White Bg2 needs activation. The White Kg1 is secured from all checks except Bb6xf7+. Black threatens Bh5xe2. No candidate stands out, so an enumeration of forcing moves (checks, captures, and threats) is next. Candidates (20.): Nxf6+, Rxd5+
20.Rxd5+
Refusal of the sacrifice drops Qe5, so:
20…exd5 [Qxd5 21.Nxf6+ Kd8 22.Rxc8+ Kxc8 23.Nxd5 wins] 21.Bh3+
(1) 21…Ke8 [Kd8 22.Rxc8#]
22.Rxc8+ Bd8 23.Nd6+ Ke7 [Kf8 Rxd8+] 24.Nc4+
White wins Qe5, possibly after 25.Rxd8+.
(2) 21...f5 22.Bxf5+ Qxf5 [Kd8 or Ke8, as above]
23.Qd6+ Ke8 24.Rxc8+ Qxc8 25.Nf6# |
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| May-22-09 | | johnlspouge: < <randomsac> wrote: I started trying to force Nxf6 and it all went downhill from there. For some reason, I didn't even look at Rxd5+ as the initial move. > I followed the same track, but noticed Rxd5+ (with Bh3+ later) after Nxf6+. In my experience, when noticing a viable candidate late, it is important to examine it (at least superficially) as the initial candidate. |
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| May-22-09 | | pkerch66: How about 20f4 ? |
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| May-22-09 | | WhiteRook48: didn't get it |
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| May-22-09 | | Big Easy: I did realize quickly that playing Qd6+ gives black big problems, so the question became: "How do I deflect the black queen so that it can't prevent Qd6+?". I had the right idea and got the initial move Rxd5+, but I didn't get the continuation played. I will say, I have a hard time visualizing what the board will look like after several moves have been played. Therefore, I sometimes give up on a line because I don't see the board as it would actually look after captures, etc. If I could actually play through the different lines on a board I would do much better - however, I don't think that helps as obviously you could never do that over the board! |
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| May-22-09 | | dzechiel: <Zooter: However, I was confused by your 20.Rxd5+ exd5 22.Bh3+ f5 22 Bxf5+ Qxf5 23 Qd6+ Qd7 24 Qf6+ Ke8 25 Rxc8+ Qxc8 26 Nd6+ and the queen goes line as I don't see how black can interpose the queen.... :P> OK, I played out this sequence with the aid of a board and I now see that while I mistakenly had the black king on d8 in my head, it's actually on d7 and your question was actually rhetorical in nature. Sorry for the error, I'll try to do better in the future. |
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| May-22-09 | | zanshin: <pkerch66: How about 20f4 ?> Illegal because of the Bishop on b6. |
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| May-22-09 | | kevin86: The key is to divert the queen,which white does on both move 22 and 24-the first time to allow the incursion of the white queen and the second to allow the death blow at 25 ♘f6#. |
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| May-22-09 | | lzromeu: The white player is very stronger than black, since the traps of the openning until the 18-24 move when black have no idea about will occur, or at least to avoid the atacks. And me too, no idea about the puzzle answuer. Brilliant game, complexily simple. |
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| May-22-09 | | DarthStapler: I thought of Rxd5+ but I missed the Bh3+ resource |
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May-22-09
 | | Jimfromprovidence: I noticed that black cannot consider 20...Ke8 because that move blocks his h rook. 
click for larger view Now, 21 Rxc8+ Bd8 22 Rdxd8# |
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May-22-09
 | | doubledrooks: Got it!. A beautiful double sack with 20. Rxd5+ exd5 21. Bh3+ f5 22. Bxf5+ and black's position is in shambles. |
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| May-22-09 | | Eduardo Leon: I saw 20. Rxd5+ exd5 21. Bh3, but thought 21. ... f5 stopped the attack. So I went for 20. Nxf6+ Qxf6 21. Rxd5 exd5 22. Bh3+ and didn't see 22. ... Qe6, and white doesn't have anything better than 23. Bxe6. I never saw the possibility of sacrificing the bishop instead of the knight in the first line: 22. Bxf5+ Qxf5 23. Qd6+. |
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| May-22-09 | | YouRang: Oh, I found a brilliant move alright. :-|
The move that struck me almost instantly was <20.f4!>. Black's terrified Q finds herself with only two safe squares to run to: f5 and b8. However, 21...Qf5 leaves d6 unguarded, so I win with 22.Qd6+ Ke8 forcing the king to block the defense of his own rook, allowing 23.Rxc8+ with mate to follow. On the other hand 21...Qb8 leaves f6 unguarded, allowing 22.Nxf6+ which forks and wins the bishop on h5. I was <shocked> when I looked at the game and discovered that this WASN'T the solution. So, I fired up my computer with the intention of confirming my winning idea, so I could come here and brag about how quickly I found this alternative solution. Unfortunately, the computer would let me play 20.f4. It turns out that black's bishop on b6 makes it an <illegal move>! :-( PHFFFFT!!! |
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| May-22-09 | | Aurora: A forced move sequence leading to mate. |
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| May-22-09 | | GreenFacedPatzer: Hey, I saw the first few moves and the general theme---amazingly good, for me, for a Friday. After 21 ... f5, though, (which I correctly figured to be Black's best and/or only defense), I got lost in the thicket of variations. I saw ways for white to press his advantage from there, but none so forceful as the game continuation. Giving myself 60% credit for this one. |
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| May-22-09 | | dumbgai: Tough puzzle. I was way off. |
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| May-22-09 | | ruzon: <DarthStapler: I thought of Rxd5+ but I missed the Bh3+ resource> I'm with Darth, a man of few but powerful words. Darth, when I see "Didn't get it" from you, I feel your pain, and not just because you are choking me from a thousand miles away. |
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| May-22-09 | | waustad: Seeing the name Tauber I keep singing stuff auf Deutsch. He had a little more top and a lot better voice. |
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| May-22-09 | | newzild: I calculated as far as 21...f5, but missed 22.Bxf5+ |
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| May-23-09 | | zenpharaohs: OK the line according to Rybka 3:
20 Rxd5 Qxd5
Yes, Qxd5 is better than exd5. According to Rybka, about a Rook better. It's not good, though, but still, exd5 is worse enough to be wrong. 21 Nxf6+ Kd8
22 Rxc8+ Kxc8
23 Nxd5
Insult to injury - if Black takes the Knight, White will fork the rook with Qc3+! It is enough to make 23 ... Rd8 a candidate here. According to Rybka 3, though, it is still better for Black to let White simplify: 23 ... exd5
24 Qc3+ Kd7
25 Bh3! f5
no, don't ask my why, it appears to be some computer-understandable move. Over the board I would prefer not to sac the pawn to improve the position of my opponent's Bishop, but Rybka 3 is a lot stronger than I am. The jig is up, anyway: 26 Bxf5+ e7
27 Qxh8 Bf7
28 Qe5+ Kf8
29 Qf6 Ke8
30 Qd6 Bc7
Black has reached the furniture throwing stage. I think this means that 25 f5 was at best some minor delay. 31 Qxc7 Kf8
Rybka announces Mate in 12.
Now I saw 20 Rd5+, but for some reason I thought there was a transposition from this line 20 Nxf6+ Qxf6
21 Rxd5+ exd5
22 Bh3+
which looked pretty good for White except I didn't see that Black could return the sacrifice: 22 ... Qe6!
I suppose I too easily overlooked the possibility that the opponent will pin his own Queen to the king. 23 Bex6+ Kxe6
24 Qf4
we have to hold on to the Rook, and the attack is blunted. White stands slightly better (according to Rybka) but the great opportunity was wasted. |
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| Jun-01-09 | | patzer2: For the Friday, May 22, 2009 puzzle solution, the clearance sacrifice 20. Rxd5+!, followed by a couple of key deflections, sets up a mating attack. |
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Kibitzing
sac: 20.Rxd5+