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Lothar Vogt vs Gennadi Kuzmin
Zinnowitz 8th (1971), Zinnowitz GDR, rd 4, Sep-19
Sicilian Defense: Fischer-Sozin Attack. Main Line (B89)  ·  0-1


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Kibitzer's Corner
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Jan-24-18  jrredfield: Well I got this one right away after failing on the last two days. To me, this has been the easiest puzzle of the week. White's knight is so positioned to block Black's progress that the one move to break up the blockade is 31...Rxe4! The rest is easy.
Premium Chessgames Member
  ChessHigherCat: I was just watching youtube when I felt a bit of sand in the oyster, producing this perplexing pearl (which should ideally be pronounced by Sylvester the Cat for full effect): IF 31.Qg4 Rxe4 32.dxe4 Rxc5 33. Qxe4 Qd1 then white only has 34.Qe3+ and Qxc5, which is still winning but there's no forced mate. I thought this was easier than yesterday's, too.
Jan-24-18  Cheapo by the Dozen: Cute one. I quickly saw the need to remove the knight, the fact that the bishop was pinned afterwards, and the idea of exchanging the bishop and then forking king and rook.

What took me a little longer was finding the actual game line and solution. :)

Premium Chessgames Member
  patzer2: I found the first moves 31...Rxe4 32. dxe4 easy enough, but didn't consider 32...Rxc5! which wins a piece due to the pin 33. Rxc5 Qa7! -+ (not 33...Qxe4? 34. Qf3 Qd4+ 35. Qf2 Qd1+ 36. Qf1 Qd4+ 37. Qd1+ =).

Instead, I grabbed the pawn with 32...Qxe4 which leads to a near winning advantage for Black after 32...Qxe4 33.Qf3 Qxf5 34.Qb3+ Kh8 35.Qxb4 f3 36.Qd4 Qg5 37.Rc2 Re8 38.Qf2 fxg2 39.Qd2 Qf5 40. Rc1 h5 ∓ to -+ (-2.54 @ 32 ply, Stockfish 8).

White's game starts to go bad with 29. f5?!, allowing 29...Nf4 ∓ (-0.39 @ 29 ply, Stockfish 8). Instead, White could have secured a good game with the strong positional exchange sacrifice 29. fxe4! Bg4 30. h3 Bxf3 31. Qxf3 ± (+1.04 @ 30 ply, Stockfish 8).

White's game goes from bad to practically lost after 30. Rxf4? exf4 ∓ to -+ (-2.38 @ 29 ply, Stockfish 8). White could have kept it near level by not sacrificing the exchange, and instead playing 30. Qf1 Bxf5 31. Be3 ⩱ (-0.31 @ 32 ply, Stockfish 8).

Jan-24-18  Mayankk: Spent 10 minutes trying to figure out a White win, especially how to make the knight fork work as I thought itís White to play and win.

By the time I realised itís Black to play and win, I was too tired to analyse much beyond the obvious Re4 sac to capture the all-important knight. I think I would have got it if not for the wasted effort earlier...

Jan-24-18  AlicesKnight: Found ....Rxe4 followed by ....Rxc5. It takes a little looking to see that after 33.Rxc5, ....Qa7 wins the R as the White Q has no means of getting to a protective position. How early did Kuzmin see it?
Jan-24-18  trnbg: I went with 31...Rxe4 32.dxe4 Qb5 (instead of ...Rxc5), which should be winning as well, because White will lose either the bishop or the rook.
Jan-24-18  saturn2: 32..RxN 33 dxR Qb5 and the bishop on c5 will fall.
Premium Chessgames Member
  agb2002: Black has a rook for a knight and a pawn.

White threatens Qxf4.

The knight protects the bishop which is on the same diagonal than the king and the white queen cannot enter this diagonal at once. Therefore, 31... Rxe4 32.dxe4 Rxc4 ends up nearly a piece ahead. For example, 33.Rxc4 Qa7 34.Qxf4 Qxc5+ 35.Kh1 Qxa5 - + [b vs P]. Or, 33.Qxf4 Rxc1+ 34.Qxc1 Qxe4.

Premium Chessgames Member
  malt: I went for <31...R:e4> 32.de4 Qb5

I was looking at
(32...Q:e4 threatening 33...R:c5 34.Rf1[34.R:c5?? Qf1#]...Qe3+ 35.Kh1 Rc1

33.Qf3 B:f5 )

Did not see 32...R:c5!

Jan-24-18  mel gibson: That knight had to be taken - it was dangerous - I saw that within seconds.

Stockfish 8 says

(31. .. Rxe4

(♖e8xe4 d3xe4 ♖c8xc5 ♕g4xf4 ♖c5xc1+ ♕f4xc1 ♕b7xe4 h2-h3 ♕e4-d4+ ♔g1-h1 ♕d4xd6 ♕c1-c4+ ♔g8-f8 ♕c4-e4 ♗d7-c6 ♕e4-e3 ♗c6-b7 ♕e3-b3 ♗b7-e4 ♕b3-c4 ♗e4xf5 ♕c4-f1 ♗f5-d7 ♕f1-c4 ♗d7-c6 h3-h4 ♗c6-b7 ♕c4-g4 ♕d6-d2 ♕g4-g3 ♕d2-c1+ ♔h1-h2 ♕c1-c5 ♕g3-d3 ♔f8-f7 ♕d3-d7+ ♕c5-e7 ♕d7xe7+ ♔f7xe7 g2-g4 ♔e7-e6 ♔h2-g3 ♔e6-e5 g4-g5 f6xg5 h4xg5 ♗b7-c6 ♔g3-h2 ♔e5-f5) +6.11/34 92)

score for Black +6.11 depth 34

Jan-24-18  saturn2: <Mayankk Spent 10 minutes trying to figure out a White win> In 10 minutes you should have found Nxf6
Jan-24-18  morfishine: First removal of the guard <31...Rxe4> 32.dxe4 allows Black to return the exchange <32...Rxc6> 33.bxc5 setting up a fatal pin with <33...Qa7> if White retakes 34.Rxc5 and White cannot defend the rook

Black ends up a clear piece ahead


Premium Chessgames Member
  ChessHigherCat: Art appreciation: If you know how to pronounce Vogt in German (v = f; the voiced consonant g is devoiced to k before the voiceless consonant t), then you are capable of savoring this refined and tasteful pun:

"Lothar Vogt Gennadi after he got devoiced"

Jan-24-18  Pasker: Spot the double rook sac instantly. After 1...Rxe4! 32.dxe4 Rxc5! 33.Rxc5 and now Qa7 or Qxe4 both wins material. Qxe4 threatens Qe8 mate and Qe3 + forking the rook. There is no defense.
Jan-24-18  trnbg: <Pasker: After 1...Rxe4! 32.dxe4 Rxc5! 33.Rxc5 and now Qa7 or Qxe4 both wins material. Qxe4 threatens Qe8 mate and Qe3 + forking the rook. There is no defense.> This is not correct. After Qxe4 White can defend with 34.Qf3. Then Black has nothing better than perpetual check (34....Qd4+ 35.Qf2 Qd1+ 36.Qf1 and so on)
Jan-24-18  TrollKing: This puzzle is somewhat cooked. I chose Qb5 instead of Rxc5. Stockfish 8 says Rxc5: 5.57 versus my Qb5: 4.68. The game continuation is better, but both are clearly winning.
Jan-24-18  Pasker: @trnbg..Yes, I missed that Qf3 defense and its a perpetual right. So Qa7 is the only winning continuation.
Jan-24-18  Halldor: I went for 32... Qb5 after the text, didn't see the pin possibility after RxB.
Jan-24-18  steinitzfan: I would never find this pin over the board. First off, it's rare for a pin to win a piece of lesser value. For that to happen, there has to be nothing that can be brought up to defend the pinned piece's square. Second, you have to remove a knight and deflect a pawn to make it work.
Jan-24-18  morfishine: <steinitzfan> This was difficult to find for me, but finally, the sequence fell into place like a domino effect, I just had to see the last move 34...Qa7 noting the White Queen cannot re-position to help out

Keep at it, many times I get the later week puzzles but falter on the early week problems??? Why is that?


Jan-24-18  Altairvega: I saw also the first move, elimination of the Horse. I did not see the continuation played in the game. Incidentally hello to everybody here!
Jan-24-18  areknames: Got this one almost immediately, imho it was considerably easier than yesterday. In the initial position Black is the exchange up (for a pawn) but forces the win through two <consecutive> exchange sacs of his own (not sure I've ever seen that before) which I found aesthetically quite pleasing!
Premium Chessgames Member
  Richard Taylor: Yes, despite missing yesterday's I found this one. I just tried to exchanges (captures) and then the virtually only tactic, a pin. So "examine all checks and captures" was used here.

Mayankk: Spent 10 minutes trying to figure out a White win, especially how to make the knight fork work as I thought itís White to play and win.

<By the time I realised itís Black to play and win, I was too tired to analyse much beyond the obvious Re4 sac to capture the all-important knight. I think I would have got it if not for the wasted effort earlier...>

I have done things like that a lot. My other problem using a chess board is setting positions up wrongly. It is annoying for sure!

Jan-25-18  eblunt: < Trollking > I had 31... Qb5 as well. It's a lovely quiet move, but tightens the ratchet on White's position by doubling up on the bishop and attacking the weak pawn.

For a puzzle, a bit poor as the end result of the combo is to win N+B for a Rook, hardly a stunning material gain.

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Featured in the Following Game Collections[what is this?]
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