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Guenter Steiner vs Norbert Sommerbauer
AUT-chT (1994), Austria
Zukertort Opening: Queen Pawn Defense (A06)  ·  0-1



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Kibitzer's Corner
Jul-23-15  abuzic: 27...Nxh3+ wins the Q or mates:
28.Kf1 Qh2 29.Bxh3 Qh1+ 30.Kh2 Ne4#
Jul-23-15  sushijunkie: A mating pattern I've not seen before, not that that means anything. Even though I got it
Premium Chessgames Member
  agb2002: Black has two knights for a rook and a bishop.

White threatens 28.Qxf2.

The obvious move is 27... Nxh3+ 28.Kf1 (28.Kh1 Qxe1+ wins) 28... Qh2 29.Bxh3 Qh1+ 30.Kf2 Ne4#.

Much slower is 30... Qxh3+:

A) 30.Kf2 Ng4+ 31.Kg1 Qh2+ 32.Kf1 Qh1#.

B) 30.Kg1 Ng4 (threatens mate in two) 32.Qf2 (what else?) 32... Nxf2 - + [Q+P vs R].

Jul-23-15  diagonalley: very pretty...
Jul-23-15  dfcx: Black to move.

27... Nxh3+ 28. Kf1 (Kh1 Qxe1+) Qh2

A. 29. Qf2 Nxf2
B. 29. Bxh3 Qh1+ 30.Kf2 Ne4#

Black either mates or wins the queen.

Jul-23-15  jith1207: Moral of the day, for me: in fact, same moral for 1000th time for me : if you think you got it, still go through every move to look for a better move. If you think you got a piece, you might actually have to look if you would even get opponent's king instead.
Premium Chessgames Member
  Gregor Samsa Mendel: A beautiful mating pattern, which reminds me of Bogoljubov vs M Monticelli, 1930.
Premium Chessgames Member
  An Englishman: Good Evening: A beautiful mating pattern, and I believe the problem composers call this a "pure" mate, in that every possible flight square for the King is covered by only one piece.
Jul-23-15  vodkaboris: Surely two pieces cover the flight squares? The queen has all but g3, which is the knight's.
Jul-23-15  gofer: Snaffling Ph3 doesn't seem to do much. Black is an exchange down, has a loose pawn on b7 and a weak back rank, so needs to sort out these before attempting any small gains...

White threatens to play e4 or Rcd2, black would prefer to not to allow e4, so lets look at N6e4... ...BUT only after we look at the most forcing sequence which brings us back to Nxh3+...

<27 ... Nxh3+>

27 Kh1 Qxd1+ mating soon

<28 Kf1 Qh2!>
<29 Bxh3 Qxh3+>

30 Kf2 Ng4+
31 Kg1 Qh2+
32 Kf1 Qh1#

<30 Kg1 Ng4>

Game over! The same combination is available and it is unavoidable...

31 Qh4 Qxh4
32 Kg2 Qf2+
33 Kh3 f5 lining up Qh2#

click for larger view

So snaffling the pawn was a good idea after all!!!



Jul-23-15  fokers13: really easy for a thursday.


Premium Chessgames Member
  Oxspawn: Well I got the first move and white's forced reply but for me that is where the puzzle really started. The position felt good but which way to go? Frankly, I did not see the mate coming and it took me a moment or two to realise it had happened. I wonder if that was also the experience for Steiner.

By the way <fokers13> - if you get something it is generally 'easy'. If you don't, it isn't. Any day of the week.

Premium Chessgames Member
  whiteshark: Me thinks White is not a <Cross of Iron> Steiner descendant.
Jul-23-15  saturn2: I finished when I verified ..30 QxBh3 works. The other solution is more elegant of course.
Jul-23-15  morfishine: FWIW: Taking the Bishop wins too: <29...Qxh3+> 30.Kf2 Ng4+ 31.Kg1 Qh2+ 32.Kf1 Qh1# or <29...Qxh3+> 30.Kg1 Ng4 31.Qf2 Nxf2


Jul-23-15  wooden nickel: Since it's a bit easy, how about trying it the hard way: 27... N6e4, protecting the knight and causing other trouble! 28.Kf1 f5 (or Qh2!, but this gives a different approach) 29.Bxe4 fxe4 30.Qxf2 Rf8

click for larger view

It's probably only a draw!

<Gregor Samsa Mendel: A beautiful mating pattern, which reminds me of Bogoljubov vs M Monticelli, 1930> Good example!

Jul-23-15  CHESSTTCAMPS: Black has 2 active knights for a rook and a bishop, with a big advantage in king safety and queen mobility. White threatens 28.Qxf2, which might tempt 27... N6e4, where the knights protect each other and tie up the white position. However, black has a much stronger, forcing continuation available:

27... Nxh6+ 28.Kf1 (Kh1 Qxe1+) Qh2! 29.Bxh3 (otherwise 29... Qg1#) Qxh3+ 30.Kg1 (Kf2 Ng5+ forces mate) Ng5 and now white must give up queen for knight with Qf2 to avoid 30... Qh2+ 31.Kf1 Qh1#

Jul-23-15  CHESSTTCAMPS: Missed the simpler, quicker, prettier mate.
Premium Chessgames Member
  Penguincw: Ooh, I came close to getting this one. 27...Nxh3+ 28.Kf1 (otherwise queen hangs) Qh2, although I couldn't calculate what white might play next.

Might get this OTB.

Premium Chessgames Member
  kevin86: I think this is the kind of puzzle that actually easier to play through rather than puzzle through. The moves are pretty easy, but it is easy for me to "outguess" myself and muddy the waters.
Premium Chessgames Member
  patzer2: Here's my look at the game and today's Thursday puzzle (27...?) with Deep Fritz 14 x 64:

<1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. b3 Bg4 5. Bb2 Nbd7 6. d3 e6 7. c4 Bd6 8. O-O O-O 9. Qc2 Qe7 10. Nbd2 Ba3 11. Rfe1 Rfe8 12. h3 Bh5 13. Rab1 Bxb2 14. Qxb2 Bxf3 15. Bxf3 e5 16. Bg2 Qd6 17. Rbc1 Rac8 18. Rc2 e4 19. dxe4 dxe4 20. Nf1 e3 21. Nxe3 Rxe3 22. fxe3?!> Up until now White's game is fine. Fritz indicates 22. fxe3 is level, but IMO it concedes too much active play to Black and makes it much more difficult for White to hold the position.

Instead, White can safely win the exchange with 22. Rd2! when play might continue 22... Qc7 23. fxe3 Qxg3 24. Red1 Qxe3+ 25. Kh2 Qe7 26. Qd4 (+0.29 @ 22 depth, Deep Fritz 14) with much better chances than in the game continuation.

<22... Qxg3 23. Qc1 Ne4 24. Rd1?> This is a mistake which concedes Black a strong advantage.

Instead White can hold with 24. Rf1! when Fritz indicates play might continue 24...Rd8 25. Rf3 Qe5 26. b4 h6 27. Rf4 Ndf6 28. Qe1 Rd7 29. a4 Nd2 30. b5 Nfe4 31. Rxd2 Nxd2 32. bxc6 Qxe3+ 33. Qf2 Qxf2+ 34. Kxf2 bxc6 35. Bxc6 Rc7 36. Bd5 Nb3 37. Rf3 Nc5 38. a5 Re7 39. Rg3 Kf8 = (-0.07 @ 23 depth, Deep Fritz 14).

<24... Ndf6 25. Rd4?> This is the decisive error.

Instead, White should play 25. Rf1! when play might continue 25...Rd8 26. Rf3 Qe5 27. Rf4 g5 28. Rf3 Rd7 29. Rf1 Ng3 30. Rf2 h5 31. c5 a5 32. Rc4 Nge4 33. Bxe4 Nxe4 34. Rg2 Rd5 35. Rd4 Rxd4 36. exd4 Qxd4+ 37. e3 Qd5 38. Qc4 Qxc4 39. bxc4 f6 40. Rb2 Nxc5 41. Rd2 Kf7 42. Rd8 = (-0.12 @ 22 depth, Deep Fritz 14x64).

<25... c5!> This is the winning deflection move which sets up today's puzzle position (27...?).

<26. Rd3> If 26. Rd1 then it's mate after 26...Nf2 27. Rdd2 Nxh3+ 28. Kh1 Ng4 29. Qg1 Qh2+ 30. Qxh2 Ngf2#.

<26... Nf2 27. Qe1 Nxh3+> This solves today's Thursday puzzle.

<28. Kf1> If 28. Kh1 White mates after 28... Qxe1+ 29. Kh2 Nf2 30. Rd6 N6g4+ 31. Kg3 Nh1+ 32. Kxg4 Qg3+ 33. Kf5 (33. Kh5 g6+ 34. Rxg6+ fxg6+ 35. Kh6 Qh4#) 33... Re8 34. Re6 Rxe6 35. Bh3 Re5#.

<28... Qh2 29. Bxh3 Qh1+> Initiating mate-in-two is quickest and best.

Black can still win, albeit more slowly, with 29... Qxh3+ when play might continue 30. Kf2 (30. Kg1 Ng4 31. e4 Qh2+ 32. Kf1 Qh1#) 30... Ng4+ 31. Kg1 Qh2+ 32. Kf1 Qh1#.

<30. Kf2 Ne4#>

Jul-23-15  BOSTER: Maybe, only maybe, non-forced moves win also.

27...N6e4 28.Kf1 Qh2
if 29.Bxe4 Nxe4 with mate (diagram).

click for larger view

if 29.Bf3 Ng3#.

if 29.Qc1 Nxh3 with mate.

So, white has to play 29.Qxf2 Nxf2 30.Kxf2 Kf8.

This is obvious that <forced marriage> with 27...Nxh3+ is more strong.

Jul-23-15  BOSTER: <fokers13: 4/4>. Something is wrong here.
Try again.
Jul-23-15  Moszkowski012273: Got it!

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