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Ernst Grobe vs A Johnsson
? (1986)
Scotch Game: Scotch Gambit. Advance Variation (C45)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Nov-19-06  ahmadov: This is a difficult one. Even my computer has difficulties to find it :).
Nov-19-06  GufeldStudent: Actually, I believe you can start both with Rxc7 or Bxh7, just this first line is a lot longer.
Nov-19-06  Operation Mindcrime: Good variation on the Greek Gift theme - ♗xh7+ looked obvious given the denuded Black kingside, but the presence of the ♘ at e6 was in the way of the usual follow-up, ♘g5+. This meant that the deflection sacrifice, ♖xc7!! was the key to the whole position; if the rook is taken by the knight, ♘g5+ wins.

Took some time to figure out..

Nov-19-06  Peter Johnson Ng: I figure Bxh7, cant find the winning lines. Rxc7 is a shock to me as the attack suddenly swing to the Queenside. Nice combination by Grobe!!!
Nov-19-06  Rubenus: Huh? I really don't see why black resigns. Sorry that I am so stupid, but what when black just takes the knight?
Nov-19-06  Ch3ckmate: if black takes knight then: 21. ..Bxe7 22.Rxd7, then black either just loses a bishop or eats e7 with ..Rxd7 23.Rxd7 then black has to move bishop from danger from e7 so ..Bd8 24.Rxf7, after that position you can imagine white would not have problems to win anymore
Nov-19-06
Premium Chessgames Member
  chrisowen: 8..dxc3 looks weak to me
Nov-19-06
Premium Chessgames Member
  al wazir: <mig55>: 20. Rxc7 Nf4 21. Ng5+ Kg8 22. Qe2 Bf4 23. Nxe7+ Bxe7. Now what?

If 24. Rxc8 then 24...Bxc2 25. Rxc2 Bxg5, and white is a piece down.

Nov-19-06  HelaNubo: <al wazir>: Correcting some typos (I presume): 20. Rxc7 Nf4 21. Ng5+ Kg8 22. Qc2 (and not Qe2) Bf5 (and not Bf4) 23. Nxe7+ Bxe7:


click for larger view

at this point 24. Rxd8+ is better than 24. Rxc8, and then: if 24... Qxd8 25. Qxf5, and if 24...Bxd8 25. Rxc8 Bxc2 26. Rxa8 and the bishop being pinned cannot take in g5. In both cases white has an overwhelming advantage. Anyway, also in your line after 24. Rxc8 Bxc2 white can play 25. Rdxd8+! (and not 25. Rxc2) Bxd8 26. Rxa8 and wins.

Nov-19-06  Chess Classics: I hate Sundays...actully, I like them a lot ;D

But I missed this one.

Regards,
CC

Nov-19-06  TrueBlue: I saw both sacrifices. Wan't sure which to try. It turns out, you have to do both.
Nov-19-06  chessmoron: It looks like this puzzle was used on another Sunday.

I got Bxh7+ quickly and Rxc7 a minute or two.

Difficult puzzle indeed but manageable.

Nov-19-06  TopaLove: It´s interesting that it took a lot of time to Fritz 8 to find out that White was better after Bxh7+
Nov-19-06  Fisheremon: <crafty: 19...Kh8 20. Nxc7 Nc6 21. Nxe6 Bxe6 22. Bd3 Kg8 23. Ng5 (eval 2.40; depth 13 ply; 750M nodes)> 22. Be4 (instead of 22. Bd3) Rxd1+ 23. Rxd1 g6 24. Ng5 Nd8 25. Qf3 Kg8 26. Bxg6 with winning attack.

<crafty: 20. Nxc7 Nxc7 21. Ng5+ Kg6 22. Nf3 Nf5 23. g4 Bb5 (eval -3.66; depth 12 ply; 750M nodes)> Indeed 20. Nxc7 (instead of 20. Rxc7) works too, 20...Nxc7 21. Ng5+ Kg6 22. h4 with two main variations 22...Nc6, 22...f6. In both variations White gets a fierce attack.

Nov-19-06
Premium Chessgames Member
  kevin86: My move was a little simple-19 ♘xc7 ♘xc7 20 ♕c2 threatening mate and pinning-regaining the knight.-but he just regains a pawn-not addind one:(
Nov-19-06
Premium Chessgames Member
  al wazir: <HelaNubo>: Thanks. Sorry about the typos.

I think your analysis is correct on all counts. But I couldn't see all that at move 19, at least not in a reasonable amount of time, which is why I was afraid of 20. Rxc7.

Of course it's open to question whether E. Grobe saw all these ramifications when he played the move. Maybe he just took a chance and got lucky. If he had guessed wrong, we wouldn't be looking at it.

Nov-19-06  Kwesi: I've probably missed something, but what happens after 20. Rxc7 Nxc7 21. Ng5+ Kh6 ?
Nov-19-06  mig55: Al wazir, then Johnsson must be a superb player, while he resigns:-)
Nov-19-06  cjhasbrouck: This puzzle is so far beyond anything I could possibly solve at my present skill level.
Nov-20-06  Fisheremon: <Kwesi: I've probably missed something, but what happens after 20. Rxc7 Nxc7 21. Ng5+ Kh6 ?> 22. Nxf7+ Kh7 (22...Kg6 23. Qh5+ Kxh5 24. Nf4+ Kh4 25. g3#) 23. Qh5+ Kg8 24. Ng5 Bf5 25. Nf6+ gxf6 26. exf6 Rxd1+ 27. Kh2 Bg7 28. Qf7+ Kh8 29. fxg7#
Nov-20-06  Kwesi: <Fisheremon> Wow, I didn't even consider 25. Nf6+
Nov-22-06  Rubenus: Thank you Ch3ckmate for your help.
Oct-26-11  Shelter417: ...so, newbie question...why's the bishop sac necessary? Why not just start with Rxc7?
May-30-13  master of defence: In the final position, why not 21...Qxc7? Where's white win here?
May-30-13
Premium Chessgames Member
  Phony Benoni: <master of defence> After <21...Qxc7>:


click for larger view

White mates in three: <22.Ng5+ Kh6> (22...Nxg5 23.Qh5#, or 22...Kh8 23.Qh5#) <22.Nxf7+ Kh8 23.Qh5#>.

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