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Tomi Nyback vs Ulf von Herman
Bundesliga (2009/10), Germany GER, rd 1, Oct-17
Bogo-Indian Defense: Grünfeld Variation (E11)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 4 ·  Later Kibitzing>
Dec-14-09  goodevans: All those who have been asking for tougher problems on Mondays and Tuesdays - it seems like you've got your wish!
Dec-14-09  Patriot: Maybe this is objectively harder for a Monday since white can consider Rxe6 or Nxe6 or Qxh5.

But knowing the pattern of Blackburne's mate, it's easy to see that 20.Qxh5 is good enough.

I never considered 20...h6, but did look at the forcing delay 20...Rxe1+ and since it doesn't get black out of his predicament it doesn't refute anything. The reply 20...h6 stops immediate mate but is insufficient after 21.Nxe6.

Dec-14-09  cyclon: 20.Qxh5.
Dec-14-09  Formula7: <Dr.J> If 22.Ndf3 Bg7 23.Bxg6 Bxb2 then 24.Bxf7+ Kf8 25.Nh7+ Kg7 26.Qg6+ Kh8 27.Nf6 and mate cannot be stopped.
Dec-14-09  CHESSTTCAMPS: Seems I'm missing some basic things lately, such as h6.

<SufferingBruin:> This is exactly why you don't need a master rating to be a great chess teacher - you can amaze, delight, and thrill them (at least some of them, anyway) - with chess itself.

Dec-14-09  Patriot: <<CHESSTTCAMPS>: Seems I'm missing some basic things lately, such as h6.>

20...h6 isn't much of a reply though. It stops mate but 21.Nxe6 is simple enough.

There's a little more, as some point out, after 20...Rxe1+ 21.Rxe1 h6. But even then it's not so critical since white could play 22.Bxg6.

So don't beat yourself up too badly on this. :-)

Dec-14-09
Premium Chessgames Member
  David2009: Monday's puzzle T Nyback vs U Von Herman, 2009 White 20?

20 Qxh5! wins a N for starters, e.g. 20...h6 21 Nxe6 etc. But not 20 Nxe6? which allows Black to struggle on with 20...Bxe6 21 Rxe6!? Qc8!. Time to check:
=====
20...Resigns, I see from other kibitzes that I have missed the force of 20...Rxe1+! 21 Rxe1 h6, but White will be 2 pawns up. On-line Crafty link for those who want to pursue things/ practice winning:


click for larger view

Nyback-Von Herman 2009, 20? http://www.chessvideos.tv/endgame-t... You are white, drag and drop the move you want to make.

Dec-14-09
Premium Chessgames Member
  Once: <CHESSTTCAMPS: <SufferingBruin:> This is exactly why you don't need a master rating to be a great chess teacher - you can amaze, delight, and thrill them (at least some of them, anyway) - with chess itself.>

Well put! I too thoroughly enjoyed <SufferingBruin>'s little one act play - I could just picture the classroom scene.

Dec-14-09  goodevans: <Patriot: Maybe this is objectively harder for a Monday since white can consider Rxe6 or Nxe6 or Qxh5.

But knowing the pattern of Blackburne's mate, it's easy to see that 20.Qxh5 is good enough.>

I'd say the amount of analysis generated by this puzzle was evidence enough that it wasn't that easy. I spotted Qxh5 quickly enough, but seeing beyond that kept me engrossed for several minutes.

Dec-14-09  Patriot: <goodevans> The amount of analysis isn't really evidence because in terms of knowing that Qxh5 is winning there's a lot of over-analysis in the kibitzing.

For example, take a look at how much analysis <Life Master AJ> did or how much <dzechiel> did, and they are strong players.

Dec-14-09  Patriot: Let me clarify before this gets misinterpreted. I was trying to say that <Life Master AJ> and <dzechiel> did not think more analysis was necessary. They concluded Qxh5 is winning so there's no point in proving just how much it's winning.
Dec-14-09
Premium Chessgames Member
  patzer2: Finnish phenom Tomi Nyback's 20. Qxh5! initiates a decisive mating attack with the threat of 20... gxh5 21. Bxh7#, which exploits the pin on g6 and solves today's Monday puzzle.
Dec-14-09  WhiteRook48: 20 Qxh5. Almost went for 20 NxR instead though
Dec-14-09  CHESSTTCAMPS: <....They concluded Qxh5 is winning so there's no point in proving just how much it's winning.>

But working out the detail was much more interesting than the usual Monday!

<So don't beat yourself up too badly on this. :-)>

Too late - I did a real Sarge vs Beetle Bailey job on myself. (Beetle lies flattened on ground with missing teeth and stars orbiting head.) :-)

Dec-14-09  muralman: Hooray for Monday.
Dec-14-09  wals: [Event "2009-2010 Bundesliga"]
[Site "Germany GER"]
[Date "2009.10.17"]
[Round "1"]
[White "Tomi Nyback"]
[Black "Ulf Von Herman"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2615"]
[BlackElo "2424"]
[PlyCount "89"]
[EventDate "2009.10.17"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 d5 5. a3 Be7 6. e3 O-O 7. Bd3 c5 8. b3 cxd4 9. exd4 b6 10. O-O Bb7 11. Qe2 Nc6 12. Bb2 Re8 13. Rfe1 Bf8 14. Rac1 g6 15. c5 e5 16. dxe5 bxc5 17. Ng5 Nh5 18. Qg4 Bc8 19. e6 Rxe6 20. Qxh5 h6 21. Nxe6 Bxe6 22. Bxg6 Qg5 23. Rc3 Qxh5 24. Bxh5 d4 25. Rg3+ Kh7 26. Bg6+ fxg6 27. Rxe6 Ne7 28. Ne4 a5 29. Nf6+ Kg7 30. Nd7 Kf7 31. Rf6+ Kg8 32. Nxc5 Rc8 33. Ne6 Bg7 34. Nxg7 Kxg7 35. Rd6 Kg8 36. Rf3 Rb8 37. Rxd4 Nf5 38. Rd7 Ra8 39. g4 a4 40. gxf5 Ra6 41. f6 Kf8 42. f7 Rf6 43. Rxf6 h5 44. Rxg6 axb3 45. Bg7# 1-0

how it may have ended...

Dec-14-09
Premium Chessgames Member
  Check It Out: White is down a pawn.

<20.Qxh5 h6> (20...gxh5 21.Bxh7#)

<21.Rxe6 Bxe6 22.Bxg6 Bg7> to prevent mate at h7 and if 22...fxg6 23.Qxg6+ followed by mate

<23.Bxf7+ Kf8 24.Nxe6+> royal fork

That's a lot of calculation for a Monday

Let's see what happened.

============

Black resigned, but there seems to be a lot of action after the h5 queen sac. Let's see what everybody's saying...

Dec-14-09
Premium Chessgames Member
  Eisenheim: Did anyone yet go for the bad pun "Ulf, I did it again."
Dec-14-09  turbo231: Missed it. I considered QxN but I didn't follow through. What about NxR,BxN,RxB,PxR,QxP#. But QxN is far better. I don't think you could beat Rybka with the former (NxR) but you can with the latter QxN.
Dec-14-09  turbo231: I'm going to try to beat Rybka using NxR. Wish me luck! I bet I'll lose.
Dec-14-09  gauer: Alternatives to 19... ♖xe6 don't seem to be too fun for black, either (Kibitzer mode Deep_Fritz8/cbase9 found a few other immune pieces that seem to hang in the sidelines): (19..f5 20.♗xf5 ♗g7 21.♗xg7 ♔xg7 (21...♘xg7 22.♕h4) 22.♖xc5 [+3, d~8])

(19..fxe6 20.♕xh5 ♖e7 21.♗xg6 ♕c7 22.♗f6 h6 23.♖xc5 (23.♗xe7 [+8, d~9]) ♗b7 24.♗xe7 ♕xe7 25.♗h7+ ♔h8 26.♘f7+ ♔xh7 27.♖xe6 [+18, d~8]

(19..♗xe6 20.♖xe6 (20. ♕xh5 [+5, d~9] h6 21.♘df3 [+5, d~9] ♘e7 22.♘xe6 gxh5 23.♘xd8 ♖exd8 24.♖xc5 ♘g6 25.♖c6 ♖db8 26.♘d4 ♖e8 27.♖xe8) ♖xe6 21.♘xe6 ♕b6 22.♘xf8 ♖xf8 23.♕g5 ♖e8 24.g4 ♘e5 25.♗xe5 f6 26.♕h6 ♖xe5 27.♘c4 ♕xb3 (27...dxc4 28.♗xc4+ ♖e6 29.gxh5) 28.♘xe5 fxe5 29.♗xg6 hxg6 30.♕xg6+ ♘g7 31.♖b1)

The main defence seems to be which piece down ending for black to choose at move 19. Or did he have better there that allowed him to survive with a harder puzzle starting the move previous?

Dec-14-09  md65000: Poor Ulf, losing to a combo that has appeared in every tactics puzzle book ever written. After this game he must have felt like Jose Canseco with the fly ball bouncing off his head and into the stands for a home run.
Dec-14-09  turbo231: I played Rybka using NxR you know RYBKA never moves the way you want her to move. I resigned after 4 moves, it was hopeless.
Dec-15-09  turbo231: QXN dosen't work either, Rybka goes RXR+,RXR,H7-H6! And it's even!
Dec-15-09
Premium Chessgames Member
  kevin86: A queen sac-a passive one which can be refused,at the loss of a piece.

The penalty for acceptance is immediate mate.

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