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Sam E Collins vs Dale R Haessel
Berkeley International (2011), Berkeley, CA USA, rd 9, Jan-07
English Opening: Anglo-Indian Defense. Mikenas-Carls Variation (A15)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
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Jun-18-15  wierba: mate in five?
Jun-18-15  wierba: 29. ??? mate in five?
Jun-18-15
Premium Chessgames Member
  patzer2: Here's my look at the game and the Thursday (26. ?) puzzle with the Opening Explorer and Deep Fritz 14:

<1. c4 Nf6 2. g3 c5 3. Bg2 e6 4. Nf3 Be7 5. O-O O-O 6. Nc3 a6> The game transposes into a variation of the Symetrical English.

An alternative I like is 6... d5 as in E Romanov vs V Zvjaginsev, 2009.

<7. b3 Qc7> Another good try is 7... Nc6 as in S Garcia Martinez vs Ulf Andersson, 1975.

<8. Bb2 b6 9. Rc1 Bb7 10. d4 cxd4 11. Qxd4 d6 12. Rfd1 Nbd7 13. e4 Rac8 14. Qe3 Qb8 15. Nd4 Rfe8 16. Re1 Bf8 17. Qd2 Qa8 18. Re2 g6 19. Rce1 Bg7 20. h3 Red8 21. Qe3 d5> This, according to Fritz, concedes the advantage to White after 22. cxd5 exd5 23. e5 (+0.61 @ 22 depth).

Instead, Fritz indicates Black can keep it level with 21... e5 22. Nf3 b5 (-0.07 @ 20 depth).

<22. cxd5 exd5 23. exd5> Fritz indicates this puts it back to level, and instead prefers 23. e5! Re8 24. f4 to (+0.61 @ 22 depth).

<23... Nxd5 24. Nxd5 Bxd5 25. Nf5 Bxg2??> This try, taking the wrong piece, is the losing move.

Instead of taking the Bishop, Black needs to capture the Knight with 25... gxf5 when Fritz indicates play might continue 26. Qg5 f6 27. Bxf6 Nxf6 28. Re7 Ne8 29. Rxg7+ Nxg7 30. Re7 Bf7 31. Bxa8 Rxa8 32. Qf6 Rd1+ 33. Kg2 Rf8 34. Qxb6 Bd5+ 35. f3 Rd3 36. Qxa6 Rxf3 37. Qd6 Ba8 38. Kg1 Be4 39. Ra7 f4 40. Rxg7+ Kxg7 41. Qe5+ Rf6 42. Qe7+ Rf7 43. Qxe4 Rxg3+ 44. Kf1 Rxh3 = (0.00 @ 24 depth).

<26. Nh6+!!> This winning move solves today's Thursday puzzle.

<26...Kh8>

If 26... Kf8, then 27. Qe7#.

If 26... Bxh6, then 27. Qxh6 f6 28. Re7 Re8 29. Qg7#.

<27. Nxf7+ Kg8 28. Nh6+ Kh8>

If 28... Kf8, then 29. Qe7#.

<29. Bxg7+> This wins, but Fritz finds the flashy alternative 29. Qd4! (diagram below)


click for larger view

which forces mate after 29... Nf6 30. Qxf6 Bxf6 (30... Rd7 31. Qxg7+ Rxg7 32. Re7 Rc3 33. Re8+ Qxe8 34. Rxe8+ Rg8 35. Bxc3#) 31. Bxf6#.

<29... Kxg7 30. Qe7+ Kh8>

If 30... Kxh6, then 31. Qh4+ Kg7 32. Re7+ Kf8 33. Qf4+ Nf6 34. Qxf6+ Kg8 35. Qg7#.

<31. Nf7+ Kg8 32. Ng5 Nf8 33. Qf7+ Kh8 34. Re7 1-0>

Black resigns in lieu of 34...Rc7 35. Qg7#.

Jun-18-15  diagonalley: good puzzle... "medium"(?) ... too tricky pour moi :-(
Jun-18-15
Premium Chessgames Member
  patzer2: <al wazir: Very pretty combination. Black is helpless. So was I.> I got as far as guessing the first move 26. Nh6+ and was ready for 26...Kf8 Qe7#.

But otherwise I had to rely on Fritz to see the rest of it.

Jun-18-15
Premium Chessgames Member
  Once: Yup, 29. Qd4 is the prettier of the two possibilities:


click for larger view

The queen is immune because of the threatened bishop and knight mate.

29. Bxg7+ is equally as good pragmatically, but doesn't have that same care-free nonchalance as a queen sac in the middle of the board.

Jun-18-15
Premium Chessgames Member
  offramp: That alternative of 29.Qd4 is really good!
Jun-18-15
Premium Chessgames Member
  morfishine: I became hypnotized by the power in White's position and figured a headlong frontal assault was sufficient. With White tripled on the e-file, its “Hey Diddle-Diddle, Straight up the Middle”

<26.Ne7+> followed by 27.Nxc8

Its strange, pattern recognition revealed the thematic Knight on <h6> coordinating with the DSB, which I pondered for a few seconds, yet I couldn't overcome this hypnosis

*****

Jun-18-15
Premium Chessgames Member
  Oxspawn: This was described as medium so I laid my hands on the keyboard closed my eyes and asked "are you there Bobby? Paul? Emanuel?" There was no answer so I played Ne7 and waited for something to happen. But it never did. Disappointing.
Jun-18-15  gofer: I saw <26 Nh6+ Kh8 27 Nxf7+ Kg8 28 Nh6+ Kh8> and felt back was in serious trouble. I missed <29 Qd4!> which is a pity, but found it later...

<26 Nh6+ Kh8>
<27 Nxf7+ Kg8>
<28 Nh6+ Kh8>
<29 Bxg7+ Kxg7>
<30 Qd4+ ...>

Black has alternatives, but they are all horrible!

30 ... Nf6
31 Re7+ Kxh6
32 Qf4+ mating

30 ... Ne5
31 Qxe5+ Kxh6
32 Qf4+ mating

30 ... Kxh6+
31 Qf4+ g5
32 Re6+ Kg7
33 Re7+ Kh8
33 Qd4+ mating

This is definitely the POTD that keeps on giving!

Jun-18-15  cocker: 26 Nh6+ is an obvious try, but the following eight moves were beyond me.
Jun-18-15  wooden nickel: <morfishine> Don't tell anybody, but after realizing that both 26.Nh6+ and 26.Ne7+ lead to good attacking possibilities, I went for 26.Ne7+ as well. 26... Kf8 wins for White and upon 26... Kh8, I figured 27.Nxc8 Bxh3 28.Qe8+ Rxe8 29.Rxe8+ Nf8 30.Rxf8#


click for larger view

Unfortunately 28... Nf8 saves the day for Black!
In the 26.Nh6+ line, the follow up with 29.Qd4! would have been perfect!

Jun-18-15
Premium Chessgames Member
  morfishine: <wooden nickel> Your secret is safe with me: )
Jun-18-15  Makavelli II: Nh6! and the game is over. I saw it immediately due to my 40+ years experience in the game. Black can play kh8 (STILL!! losing) or kf8?? Nice puzz.
Jun-18-15  CHESSTTCAMPS: White is temporarily down a bishop, with the option of 26.Nxg7 regaining the piece. However, this would give black a chance to counter with mate threats on g2. In such positions, time is often more important than material. Here, white can speed up his mating threats with the forcing

26.Nh6+!

Initially, I preferred 26.Ne7+, but this line has the advantage of exposing the king more by picking up the f7 pawn with check.

A. 26... Kf8? 27.Qe7#

B. 26... Bxh6 27.Qxh6 Ne5 (f6 28.Re7 and black can't stop Qg7#) 28.Rxe5! Qb7 (otherwise, 29.Re8+ forces mate) 29.Re7 wins

C. 26... Kh8 27.Nxf7+ Kg8 28.Nxd8 (Qd6 - to set up a Philidor's Legacy - is met by Bd5) Rxd8 (Bxb2 29.Qe6+ Kg7 30.Qxd7+ Kh6 31.Nf7+ followed by Rxb2 cleans up) 29.Qd6+ Kh8 (Kf8 30.Qe7+ Kg8 31.Qxg7#) 30.Bxg7+ Kxg7 31.Rd1! and now black can't meet the threat of Red1, e.g. 31... N moves 32.Qe7+ wins. The mate threat 31... Bh1 is met by 32.Rxd7+ Rxd7 33.Qxd7+ Kh6 34.Qd2+ Kg7 35.Qd4+ Kh6 36.Qh4+ Kg7 37.Re7+ forces mate.

Time for review...

Jun-18-15  CHESSTTCAMPS: In C I turned "materialist" and missed the stronger 28.Nh6+.
Jun-18-15  newzild: I managed to get this, with the game continuation as my main line (I missed the quicker 29. Qd4! pointed out by <patzer2>).

I'm just commenting because nobody else has mentioned the try 26. Qh6, which was my first candidate.

On 26. Qh6?? Black has 26...Bxh6 27. Nxh6+ Kf8, when the attempted followup 28. Re7 (threatening mate on f7) fails to 28...Bd5.

Jun-18-15
Premium Chessgames Member
  LucB: <<offramp:> That alternative of 29.Qd4 is really good!>

Indeed! That pattern of taking on f7 to weaken the long diagonal is a good one to know.

Jun-18-15
Premium Chessgames Member
  kevin86: White can fork at e7, biut instead finds a better move at f7, thanx to the pin on the long line by the bishop. Mate follows soon.
Jun-18-15  BOSTER: < wooden nickel: 26.Ne7+ Kh8 27.Nxc8 Bxh3>.

27...Bxb2 , and Black is better.

Jun-18-15
Premium Chessgames Member
  Penguincw: Hmm, I went for 26.Ne7+, anticipating 26...Kh8 27.Nxc8. I'm probably missing something obvious, but can someone give me a full analysis of why this line is bad. Thanks. :)
Jun-18-15  wooden nickel: <BOSTER 27...Bxb2 , and Black is better.> yeah, that's another good response for Black and another good reason why 26.Ne7+ isn't as good as it looked at first... good thing nobody saw me do that!
Jun-18-15  bmcniece: Became obsessed with 26.Qh6, the queen is immune to capture because of an eventual checkmate on f7 with the rook. But then realized the simple reply 26...Bxb2 and black wins. Kind of proud of myself because I did find 29.Qd4! in the 26.Nh6+ winning line
Jun-18-15
Premium Chessgames Member
  Mating Net: Tremendous tactical puzzle. Those that solved it (not me) deserve some praise.
Jun-18-15
Premium Chessgames Member
  doubledrooks: I found the line 26. Nh6+ Kh8 27. Nxf7+ Kg8 28. Nh6+ and now:

a. 28...Kh8 29. Qd4, which seems to lead to mate

b. 28...Bxh6 29. Qd4 Ne5 30. Qxe5 Rc7/Rd7 31. Qh8+ Kf7 32. Qxh7+ Bg7 33. Qxg7#

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