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| Apr-23-08 | | jmrulez2004: 22.Qf3 AND PROBLEM SOLVED |
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| Apr-23-08 | | EboLedder: I saw 17. ... Rxg2+, but having missed the royal knight fork, after 18. Kh1 I would have taken the e4 bishop and lost my queen. For every step forward, two steps back. |
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| Apr-23-08 | | Marco65: Improving on a <zb2cr>'s line, 19.Qxd5 Rxf1+ 20.Rxf1 Bxd5 21.Nd6+ Kd7 22.Rxf6 is only one pawn difference, with one possible ending 22...Ng8 23.Bxd5 Nxf6 24.Bxa8 Kxd6 where Black should win thanks to the two connected passed pawns and the more active king, but the long range capability of the bishop might still give the hope of some fight (b4 and Bb7 can probably be played immediately). |
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| Apr-23-08 | | johnlspouge: Wednesday (Medium/Easy): Black to play and win.
Material: Even. Black has Rg8 on the open g-file opposite Kg1, and a battery Bb2 and Qd5 on the a8-h1 diagonal bearing down on Pg2, the obvious focus of attack. The White Be4 blocks the a8-h1 diagonal, but the obvious candidate 17…Qxe4 leads to 17…Qxe4 18.Nd6+ then 19.Nxe4,
losing Q for B. An examination of checks, captures, and threats repairs this line, however. Candidates (17...): Rxg2+, Qxe4, Qxc4, Qxd1
17…Rxg2+
Because of
18.Bxg2 Qxg2#,
the Black Kg1 has only 2 options: (1) capture or (2) flight. (1) 18.Kxg2 Qxe4+ then 19.Qxc4
winning B+N+P for R.
(2) 18.Kh1 Qxd1 19.Raxd1 [else, lose material]
19…Bxe4 20.Nd6+ Kf8 21.Nxe4 Rg6
and Black has won a P.
Like everyone else, I missed 18...Rxf2, but I am not sure whether I prefer the game line to the one I gave. I will check the options with the computer in the evening. |
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| Apr-23-08 | | YouRang: Well, I can't take the knight directly since it permits 18.Bxb7, nor can I take the bishop as that's answered by 18.Nd6+. However, one can hardly miss the Q+B battery AND the rook on g8 all converging on white's vulnerable g2 square. From this, I quickly figured that the key move was 17...Rxg2 (winning a pawn with check) and taking the rook will cost white a bishop and a knight and a badly exposed king. Obviously, white must try 18.Kh1, after which things got a bit murkier. Black's best bet seemed to be 18...Rxf2, re-exposing the king to diagonal threats, and in some lines it would make for a nifty windmill. But after 19.Qxd5 I couldn't see deeply enough to find a clear win for black. :-\ |
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Apr-23-08
 | | kevin86: A very complex position with a lot of barbs-I got the first move but failed on the second :( 17 ...♖xg2+ 18 ♔h1 ♕xe4?? 19 ♘d6+ turns the tables.. The ending is funny-I even had a variation where the white king is pushed to g8... |
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| Apr-23-08 | | Whitehat1963: Isn't 20. Qxd5 better for white?
After 20. Qxd5 Nxd5 21. Rxf2, white should have won it easily. What am I missing? |
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| Apr-23-08 | | YouRang: <Whitehat1963: Isn't 20. Qxd5 better for white? After 20. Qxd5 Nxd5 21. Rxf2, white should have won it easily. What am I missing?>
Move order: 20.Qxd5 <Rxf1+> 21. Rxf1 Nxd5, and black ends up ahead by a couple pawns. |
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| Apr-23-08 | | Whitehat1963: Ah, yes. Thanks. |
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| Apr-23-08 | | Magic Castle: <YouRang> 19.Qd5 Rf1 20. Rf1 Bd5 21. Bd5 Nd5. Thus protecting the f6 pawn and black is left with 3 pass pawns in the center. Looks like an easy win for black. |
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| Apr-23-08 | | YouRang: <Magic Castle> Yes, I see it now. My problem is that I couldn't quite see it from the given position (17...?). :-| Also, I was probably biased toward finding a 'killer move' rather than just ending up with a central pawns/endgame advantage (which is harder to appreciate from a distance) :-) |
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| Apr-23-08 | | mworld: doesn't white win the exchange if he plays 19. QxQ? |
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| Apr-23-08 | | iron maiden: After 19. Qxd5, 19...Rxf1+ followed by ...Bxd5 leaves Black a couple pawns up. |
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Apr-23-08
 | | Jimfromprovidence: <Marco65><Improving on a <zb2cr>'s line, 19.Qxd5 Rxf1+ 20.Rxf1 Bxd5 21.Nd6+ Kd7 22.Rxf6 is only one pawn difference,> This line by <Marco65>looks like white’s best play. 
click for larger viewIt’s hard to see a clear-cut win by black, but I would try with 22…Rh8 seeing 23 Bxd5 Nxd5 24 Rh6 f6. 
click for larger viewBlack seems to be reasonably well-positioned, but whether it’s enough to win I can not determine. |
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| Apr-23-08 | | sombreronegro: Nice windmill combination to recover the queen. |
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| Apr-23-08 | | Samagonka: Never expected it too go on so long after the rook sac. Isn't there a shorter combination? |
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| Apr-23-08 | | wals: Rxg2+ was my only contribution. They are just too nimble for me. |
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Apr-23-08
 | | FSR: 17...Rxg2+ 18.Kh1 (forced; 18.Bxg2?? Qxg2#; 18.Kxg2? Qxe4+ 19.f3 Qxc4  ) Rxf2+ 19.Bxd5 Bxd5+ 20.Qxd5 Rxf1+ 21.Rxf1 Nxd5 leaves Black two pawns up in an ending. Or 20.Kg1 Rg2+ 21.Kh1 Rd2+ (shades of Torre-Lasker) 22.Kg1 Rxd1 23.R(either)xd1 Bxc4 leaves Black with two pieces for a rook. |
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| Apr-23-08 | | wals: Siranush Andriasian - Dronavalli Harika, World Junior Champ. Analysis by Fritz 11: depth 44 time 12min 59 1. (-1.60): 17...Rg8xg2+ 18.Kg1-h1 Rg2xf2 19.Qd1xd5 Rf2xf1+ 20.Ra1xf1 Bb7xd5 21.Nc4-d6+ Ke8-d7 22.Rf1xf6 Ne7-g8 23.Be4xd5 Ng8xf6 24.Bd5xa8 Kd7xd6 25.b2-b4 Nf6-d5 26.a2-a3 f7-f5 27.Ba8-b7 Nd5-c7 28.Kh1-g2 2.  (0.40): 17...Qd5xd1 18.Ra1xd1 Bb7xe4 19.Nc4-d6+ Ke8-f8 20.Nd6xe4 Rg8-g6 21.Ne4-c5 Ra8-c8 22.Nc5xa6 Rc8-c2 23.Rd1-d8+ Kf8-g7 24.Rd8-d7 Ne7-f5 25.Rf1-b1 Nf5-d4 26.Rd7-c7 Rc2-d2 27.Na6-c5 f6-f5 (, 24.04.2008)
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| Apr-23-08 | | johnlspouge: Mom-and-Pop Toga II 1.3.1 analysis of the game line and my candidate, which was apparently not enough to win: [ply 15/44, time 00:05, value -1.66]
17…Rxg2 18.Kh1 <Rxf2> 19.Qxd5 Rxf1+ 20.Rxf1 Bxd5 21.Nd6+ Kd7 22.Rxf6 Rc8 23.Nxc8 Bxe4+ 24.Kg1 Nxc8 25.Rxf7+ Ne7 26.Kf2 Ke6 27.Rf8 Bd3 28.Re8 Bc4 29.a3 Bd5 30.b4 Be4 [ply 15/39, time 00:22, value -0.64]
17…Rxg2 18.Kh1 <Qxd1> 19.Rfxd1 Bxe4 20.Nd6+ Kf8 21.Nxe4 Rg6 22.Rac1 f5 23.Nc5 Nc6 24.Rd7 e4 25.a3 Kg7 26.b4 Ne5 27.Re7 Nd3 28.Nxd3 exd3 |
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| Apr-23-08 | | DualCore: Alright.
First thing I tried playing around with were queen captures. but Qxe4 fails epically to Nd6+, and Qxc4 fails somewhat epically to Bxb7. I looked at Qxd1 for a little while, but after 17... Qxd1
18 Rfxd1 Bxe4
19 Nd6+
And that blasted knight foils our plans once more. And then I found
17... Rxg2
White can't afford to accept this, methinks. If 18. Bxg2, then Qxg2 is mate. If Kxg2... 18... Qxe4+
19. f3 Qxc4
And black's in pretty good shape: a knight, a bishop and a pawn for a rook. White could choose to spend his 19th moving his king out of check instead of moving the pawn, but moving it back mates, and moving it forwards puts it in range of the e7 knight, which will form mate shortly after. So now that white can't accept the rook without causing a disadvantage, that leaves 18. Kh1
and ...Qxe4 is still out of the question because of that fracking knight, and ...Qxc4 still fails to Bxb7. ...Rxh2+ does nothing; king takes rook, black is left down a rook in a dying position. Our other rook capture is 18...Rxf2
now this one gets really interesting. Now ...Qxe4 DOES work because we can take the bishop with check. Not that we'll get the chance, as white will probably take the queen with his move, but thats the master plan. The idea behind it is that we form a "windmill" type situation as after 19 Bxd5 Bxd5+
20 Kg1 Rg2+
21 Kh1 Rd2+
22 Kg1 Rxd1
23 Rfxd1 Bxc4
We win back the queen, and and have a knight and a bishop to our opponents rook, as well as that pawn we yanked out with our first rook capture; not too shabby. White can refuse to take the queen, for example, with Qa4+ (defeats our plan of the Rd1 discovered attack), but this leaves black on that diagonal with both the queen and the bishop behind it aimed at the king, and we still have that pawn advantage with us. This puzzle is mine. I don't even care if my processor died reading in all this text. |
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| Apr-23-08 | | johnlspouge: Finally, I finished my analysis of this position, which took as many electrons as the average Friday! <<Jimfromprovidence> wrote: Black seems to be reasonably well-positioned, but whether it’s enough to win I can not determine.> I agree with him about the line from best play. For what it's worth, IMHO his final position might be technically demanding, but it should win because of the connected passers. |
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| Apr-23-08 | | TheaN: 2/3
Ahhh... for once my bro outranked me in a tactical puzzle I guess... blurting out 18....Rxf2 and I was like "BWAHA, that gets you nothing after 19.Rxf2. How wrong I was due to 19....Qxe4+ ... great combo here. The game continuation shows, I guess. I got to 17....Rxg2+, pretty much. Was looking at Qxc4 with Rd8 as final, but it didn't really got me anywhere. What a pity, missing a Wednesday, a quite obvious sac as well, with the Windmill just crying out of the position; just didn't see it for once. |
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| Apr-23-08 | | Jesspatrick: I'm a little surprised to see someone try 10. Nxe7 in this line. That move has been condemned since the late 70's as a playable, but inferior alternative. |
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Apr-27-08
 | | patzer2: For the Wednesday, April 23, 2008 puzzle solution, Black plays the demolition of pawn structure combination 17...Rxg2+!! to win decisive material due to the threats created against Black's weak King-side castled position. |
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Kibitzing
sac: 18...Rxf2