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| Sep-13-07 | | Ultra: I thought Nf3+ was the answer |
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Sep-13-07
 | | dzechiel: Black to move. "Medium" difficulty. Material even. Black has nice command of the f-file, and his knight posted on d4 exerts its influence all over the board. Also note that the white queen has nowhere to run should it be attacked. Some candidate moves I quickly see are:
- 17...Rf3
- 17...Nf3+
- 17...Bg4
The more I look at the position, the more I like 17...Rf3. It attacks the white queen, which we noted above has nowhere to run to, so the rook must be captured. But after 17...Rf3 18 gxf3 Bf4
and white has a gaping hole in his kingside that cannot be plugged easily. The pawn on f2, f3 and e4 form a wall that prevents the white pieces from coming to the defence. The big threat is 19...Bh3, 20...Qg5+ and 21...Qg2#. So, what kind of defence can white muster up?
19 Nxd4
If 19 Ne2 then 19...Nxe2 20 Qxe2 Bh3 
19...Qh4
threatening mate on h2
20 Re1 Qh3
preventing the king from running
21 Nde2 Bxh2+ 22 Kh1 Bg3+ 23 Kg1 Qh2+ 24 Kf1 Qxf2#
I will confess that I had to look at a board for the end of this combination, the white knights are the only pieces that can jump over the wall and it gets confusing. Anyway, after looking at a real set I hope I got it right. Time to check. |
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Sep-13-07
| | dzechiel: A pretty ending, I wish I had looked closer at move 19. |
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Sep-13-07
 | | White Star: the pawns on f2 and f3 are like a brick wall, and after Bxh2+! white's King does not have a friend in the world |
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Sep-13-07
 | | al wazir: I don't think there's a forced win here for black at all. After 17...Rf3 18. gxf3 Bf4 19. Nxd4 cxd4 20. Ne2 Bxh2+ 21. Kxh2 Qh4+ 22. Kg1, where's the win? Or if 19...Bxh2+ 20. Kxh2 Qh4+ 21. Kg1 Bh3 22. Nde2 Qg5+ 23. Ng3. |
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| Sep-13-07 | | nolanryan: I think in <al wazir>'s line, it goes 19 .. Qg5+, 20 Kh1 Qh4. |
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| Sep-13-07 | | mkrk17: I liked 1...Rf3 2. gxf3 Bf4. After that blacks attack is strong. I didnt go further than this but i hope i am right |
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Sep-13-07
| | dzechiel: <al wazir: I don't think there's a forced win here for black at all. After 17...Rf3 18. gxf3 Bf4 19. Nxd4 cxd4 20. Ne2 Bxh2+ 21. Kxh2 Qh4+ 22. Kg1, where's the win? Or if 19...Bxh2+ 20. Kxh2 Qh4+ 21. Kg1 Bh3 22. Nde2 Qg5+ 23. Ng3.> After 19 Nxd4 I think black can improve with 19...Qh4 (see my previous analysis). |
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| Sep-13-07 | | vibes43: A tough "Medium". I went with 17. ...Nf3 but saw no win and never would have visualized the line played. |
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Sep-13-07
| | al wazir: <nolanryan: I think in <al wazir>'s line, it goes 19 .. Qg5+, 20 Kh1 Qh4.> You're right. I guess Kluger saw that when he sacrificed the R. And the immediate 19. Ne2 loses to 19...Nxe2+. <dzechiel>: Sorry, I somehow overlooked your earlier answer to my question. |
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| Sep-13-07 | | JeremyBrowne: Although the last move, Rh1+, is very pretty, doesn't Qe2 win quicker? |
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| Sep-13-07 | | Dilbertarian: Much better than 25... Bxf1 was: 25... Qh5 26. Rfe1 Bg4+ 27. Kg1 Bxd1 since the entire rook is eaten. |
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| Sep-13-07 | | King mega: wow!!!!!!! Rf3! i never see such combo! into my book! |
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| Sep-13-07 | | Kwesi: A similar type of demolition of pawn structure as seen in this game E Dizdarevic vs Miles, 1985 |
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| Sep-13-07 | | PAWNTOEFOUR: shucks! i looked at Rf3 and then 'punked' out...<dzechiel> nice approach to these puzzles....wish i had the patience! |
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| Sep-13-07 | | dghins: If white one move earlier when the Q was attacked by the black bishop had moved his knight to D5 and exchanged Queens white could have possibly won. |
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| Sep-13-07 | | Dr. J: <Dilbertarian: Much better than 25... Bxf1 was: 25... Qh5 26. Rfe1 Bg4+ 27. Kg1 Bxd1 since the entire rook is eaten.> I think the answer to 25 ... Qh5 is 26 Kg1, and Black does not appear to have improved his position |
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| Sep-13-07 | | Dilbertarian: <Dr. J: I think the answer to 25 ... Qh5 is 26 Kg1> If 26. Kg1 then Qe2 27. Ne3 Qxe3+ 28. Kh2 Bxf1. |
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| Sep-13-07 | | pawnofdoom: Rf3!! Never thought of that. I could only think of things going round Bh3 bxg3 Nf3+, which didn't lead to anything good, and neither did Nf3+ gxf3 Bh3, which simply messed with the move order. I just couldn't find a way to coordinate all of black's pieces into an attack |
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| Sep-13-07 | | eblunt: I spent some time and came up with
17 ... f3+ 18. gxf3  f4 19. d5 xh2+ 20  xh2  h4+ 21. g1 g5+ 22. h2 h5+ 23. g1  xf3 and the white queen goes with a great attack for black really can't tell if it is winning though, maybe some Fritz users can say if it is ... |
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| Sep-13-07 | | xKinGKooLx: 4/4. Rf3 HAD to be the answer. It couldn't have been anything else. Nf3+ LOOKS nice, but when you look further, you can see it leads to absolutely nothing. Rf3, on the other hand, is forcing. It threatens the Queen, and since the Queen has absolutely nowhere to go, it forces gxf3, and then the bishop can simply go to f4 and threaten mate in two via Qh4 and Qxh2. The rest of the moves are just technique. Good puzzle. |
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Sep-13-07
 | | Marmot PFL: Rf3 is so tempting, trap the queen to force white to weaken his king. Later, with three minor pieces for the queen I thought white could still defend, but there was no coordination. |
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| Sep-13-07 | | znprdx: 17......Rf3 18.g2xf3[R] Bf4 19. Nd5 Bxh2+ 20.Kh1 Qh4 is an initial concept 18. Nd5 Qd8 19. g2xf3[R] Bf4 20.Nxf4[B]
e5xf4[N] 21. unclear
maybe 18... Qd7 19. g2xf3[R] Qh3 > with Nf3
looks like wins the queen or mates
Checking game 23...Nf6+ 24.Kh1 Qh5 etc. seems more on target |
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| Sep-13-07 | | znprdx: What is pretty about this blocade theme is that it is achieved by moving the rook en prise not capturing yet attacking. I am not yet absolutely convinced about the result which is a little long in tooth. The Nxd4[N] line provides interesting discussion points; I remain partial to Nd5, maybe then Nxd4[N] - but I think it is off to Mexico for me (hopefully via a working site). Too bad Topalov is not there - the player with the bye could provide great live commentary :) |
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| Sep-13-07 | | pferd: <dzechiel:
After 19 Nxd4 I think black can improve with 19...Qh4 (see my previous analysis).>Or better 19...Qg5+ and then 20...Qh4. |
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