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Michael Janata vs Heinz Lehmann
Germany (1969)
Reti Opening: Reti Gambit (A09)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 2 ·  Later Kibitzing>
Dec-15-07  TrueBlue: difficult one, first, tried to move all the nights, couldn't get anything working. Would probably play the obvious Rd2 in a real game.
Dec-15-07  meteficha: I'd never get this one =/
Dec-15-07  scholes: It would had been tough even for Sunday.
Dec-15-07  Manic: OK I was WAY off. No way in the world I'd have considered 31.e4. I was thiking 31.Nd7 trying to cut off the queens protection of f5 and threatening c7
Dec-15-07  TrueBlue: lol, e4, no wonder I couldn't make the night moves work :)
Dec-15-07  scholes: Games like this makes you think how good these super gms are .
Dec-15-07  Kings Indian: Whoa, hard one. I never even considered a pawn move. :( I was trying to work out Ne4.. at least I got the right squuare.
Dec-15-07  dzechiel: White to move. Material even. "Very Difficult."

Our rook on c2 is under attack, and if we try to move to c3 black gets to play 31...Nxe2+. we could play 31...Rd2 to try and save the exchange (our knight covers b3 thank goodness), but that seems awfully passive.

Well, the obvious move is 31 Nxb7 as 31...Qxb7 is met with 32 Rxc7, which looks downright nasty.

Of course, black can respond to 31 Nxb7 with 31...Nxc2, which is really embarrassing for white.

Whatever move we come up with, it had better be forcing. Looking for forcing candidate moves I see:

- 31 Ne6+
- 31 Nxf5+

Not as forcing, but perhaps possible is

- 31 Ne4

I'm not going to solve this one tonight. I'm just too tired. I'm headed off to bed after I peek at the solution. I hope to do better tomorrow.

Dec-15-07  dzechiel: I never once considered 31 e4 as the key move. Glad I gave up when I did.
Dec-15-07  Confuse: confusing one! was the queen forced to take that knight? can anyone analysis this, it looks fun : )
Dec-15-07
Premium Chessgames Member
  al wazir: 1) I never even considered 31. e4.

2) I don't think the win is forced. Black could have played, e.g., 31...e6. If 32. e5, then 32...Rf7, retaining the threat of 33...Nxc2, or 33...Ne2+ if the ♖ at c2 advances.

Dec-15-07  newzild: A really tough one this one. I looked at 31.Ne4 and 31.e4, but rejected them because the lines didn't look forcing enough. Cool game.
Dec-15-07  wouldpusher: From the looks of the puzzle, Black's c7 looks fragile and the f5 square looks like a target of attacks, but I never thought about the lines below until I looked at the solution myself.

Other possible replies to 31. e4:

31. ... fxe4 32. ♘xe4 obviously is a bad one.

31. ... e6 loses to 32. exf5 exf5 33. ♘e4 ♘xc2 34. ♘xf6 ♔xf6 35. ♖xc2

31. ... ♕e8 32. ♘xf5+ ♖xf5 33. ♕xe8 ♖xe8 34. exf5 ♘xc2 35. ♖xc2 and the endgame looks easy for White.

31. ... ♘f3+ 32. ♘xf3 gxf3 33. ♕xf3 doesn't help either.

Rybka gives an alternative: 31. ... f4 32. e5 ♖c6 33. e6! but it also favors White.

The text move ... ♘xc2 is just as bad.

So I guess the best defense was ... ♕e8 after all. The position is just too complex.

Dec-15-07
Premium Chessgames Member
  An Englishman: Good Evening: What an amazing shot. This looks like one of Nimzowitsch's tactical gems that makes you say "huh?" before you figure out the thought behind the move.

It almost looks like a trap--White seems to overlook that Black threatens his Rc2, but capturing it is actually the worst move on the board.

However, Black's alternatives might not be that great. 31...e6; 32.e5,Rf7; 33.Qg6+ invades, while 31...e5; 32.Nxf5+ seems to win a Pawn. I think. There might be a resource for Black somewhere in that morass.

Dec-15-07  whitebeach: Tough one. After running through all the knight moves and coming up empty, I finally decided on e4--but apparently for the wrong reason! My planned follow-through wasn't e5 but exf5. Whether that also works or not I have no idea--most probably not.

Great puzzle.

Dec-15-07  whitebeach: <Confuse: confusing one! was the queen forced to take that knight?>

I think so. If instead 35 . . . Kf8 or Kg8, 36. Qxg4 will either mate shortly or black will have to sac the queen for the knight anyway. And if black plays the king to h8 on move 35, again 36. Qxg4 (threatening mate), and if 36 . . . Qg8 37. Qxg8+ Kxg8 38. Nxe7+ followed by 38. Nxc6, when white will be up three pawns in a totally won endgame.

Dec-15-07
Premium Chessgames Member
  al wazir: <wouldpusher: 31...e6 32. exf5 exf5 33. Ne4> Rf7. If now 34. Rxc7, then 34...Qe6, and black still threatens 35...Ne2+.
Dec-15-07  wouldpusher: <al wazir> <31...e6 32. exf5 exf5 33. Ne4 Rf7. If now 34. Rxc7, then 34...Qe6, and black still threatens 35...Ne2+.>

But of course not ♖xc7. 34. ♕g6+ ♔f8 35. ♕xh6+ looks very dangerous.

Dec-15-07  awfulhangover: I don't understand chess! First e4, then a queen "sac". I would never ever found the line that was played here.
Dec-15-07  psmith: Well, like the rest of you I never even considered the key move. I was looking at Ne4 which doesn't come close to working.

An interesting thing is that even old Fritz 5.32 finds e4 very quickly. This seems to be a case where the move isn't "natural" for humans but isn't actually that complicated for a computer. I wonder whether MAJ's computer assessment would agree with Chessgames's 3 1/2 star rating.

Dec-15-07  Goldenraf: Hi I'm new here, today I found it, the key is Black king is in a weak position and the only protection is the rook at F6, which also protects F5 pawn, (overloaded) Trying to save white rook on C2 it will take time and be costly, speed attack is the key material against time, managed to go only to 36. Loved it good puzzle.
Dec-15-07  alshatranji: Oh God, was this tough! I didn't even consider e4. I thought of all kinds of sacrifices. It seemed to me that the winning idea was to clear the c file for the rooks to attack on c7. I got stuck on this idea, and finally settled on Ne4, even though I didn't see anything quite decisive after fxe4, 32. Rxc7 Qe6. I thought may be R(1)c5. But I was way off. I always expect soemthing really dramatic in these cases, not the simple e4.
Dec-15-07  alshatranji: I don't see why Black has to accept the sacrifice. What about 31...Qe8?
Dec-15-07  The Sicilian Dragon: I thought perhaps 31. Nb2, Qb2 32. Rc7, threatening3 3. Re7, if Black plays 32. .. . Qe8; then 33. Rb7, followed by R1c7. But alas.
Dec-15-07  wouldpusher: <alshatranji> <I don't see why Black has to accept the sacrifice. What about 31...Qe8?>

31. ... ♕e8 32. ♘xf5+ ♖xf5 33. ♕xe8 ♖xe8 34. exf5 ♘xc2 35. ♖xc2 is the main line, as mentioned in my kibitz above. White is a pawn ahead and is ready to take a couple more pawns. That should be enough to win the endgame. Despite that, I consider 31. ... ♕e8 as the best defense found so far against 31. e4.

Note that Black cannot play 32. ... ♘xf5 because of 33. ♕xg4+

About 33. ... ♕xf5 from the text: if 33. ... ♔h8, 34. ♘xh6 ♕f8 35. ♘f5+ ♔g8 36. ♕xg4+

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