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Wilfried Polifka vs Matthew Evans
Prague op-B (2005), Prague CZE, rd 4
Bird Opening: General (A02)  ·  1-0


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sac: 20.Nf6+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Nov-07-16  Nostrils: Is 'EFFULGATED' a word?
Nov-07-16  morfishine: The ole one-two
Nov-07-16  zb2cr: White can discover an attack on h7 thusly: 20. Nf6+.

If Black takes 20. ... Bxf6; 21. Qxh7# with the Queen supported by the White Bishop on d3.

If Black declines with 20. ... Kh8; 21. Qxh7# is still the move, with support from both the White Bishop at d3 and the White Knight at f6.

Premium Chessgames Member
  Once: Nf6 (and its twin Nf3) is such a good move that both white and black should try to play it if they can.
Nov-07-16  awfulhangover: How can black, a 1750 player, play so horribly bad chess? He just allows white to gain total control of the center, and then totally ignores the king's safety. I could do much better, and I am a patzer.:-)
Premium Chessgames Member
  Once: <awfulhangover> Black was playing for a hedgehog style structure. This is where his pieces and pawns are relatively passive to start with but then break out and punish white for over-extending.

When it works, white can end up looking very foolish. It's a crouching dragon, hidden tiger sort of deal. It can be very cool and ninjary. Is that a word? If not, it ought to be.

But sometimes the hedgehog gets squished and turned into roadkill. That can make it seem that the whole idea is suspect, which is probably a little unfair.

All in all, it's probably not as bad as it looks. The hedgehog is one of those hypermodern openings which seems to offend against the classical chess principles that we learn first.

Nov-07-16  goodevans: <awfulhangover> Well we all have our off days but I agree, black's play is surprisingly bad.

His position was already uncomfortable after 15 moves but <16...g6?> introduced a fatal weakness near the king that white exploited most efficiently.

Nov-07-16  psmith: The fact that this was a puzzle made me take longer to find Nf6+ than I would have taken over the board (like others I stared at Qxh7+ for a little while). That's not really a puzzle solution, I'd say, just an ordinary winning move.
Nov-07-16  YetAnotherAmateur: Of course, this surprised everyone by not being queen sac Monday, but the second-most forcing move does the job just fine: 20. Nf6+

A) ... Bxf6
21. Qxh7#

B) ... Kh8
21. Qxh7#

The other surprise was how recent this game was: I would have expected a resignation of Nf6+.

Premium Chessgames Member
  PhilFeeley: I tried to make the queen sac work, but it didn't, so then I saw Nf6+ and that was the end.
Premium Chessgames Member
  kevin86: Instead of the queen sac-white opens a triple attack on h7- then mate with bishop and queen next move.

false-Q sac!

Premium Chessgames Member
  gawain: Very very easy. The first (and last) move I looked at was 20 Nf6+
Premium Chessgames Member
  Peligroso Patzer: Along the lines of the posts by <Phony Benoni> and <lost in space>, I thought this would have been a better “Monday puzzle" if White’s king were on g2.

In that position, although 20. Nf6+ is still the fastest mate, the correct “Monday solution” would be: 20.Qxh7+ Kxh7 21.Nf6+ Kh8 22.Rh1+ Nh5 23.Rxh5+ Kg7 24.Rh7#.

Premium Chessgames Member
  TheFocus: Kindergarten tactics.

If you missed this one, maybe chess is not for you.

Nov-07-16  zanzibar: I thought this one was tricky for a Monday - no queen sac!
Nov-07-16  scholes: <pelligroso> you miss 21 ..Bxf6
Premium Chessgames Member
  HeMateMe: I think it was the "He's too fast for me" polfka.
Nov-07-16  Nullifidian: This was a good puzzle to trip up those of us who always look for a queen sac on Monday. This time it's the straightforward 20. ♘f6+ ♗xf6 (♔h8) 21. ♕xh7#

<scholes> In a scenario where the queen sac comes first, the bishop cannot capture after ♘f6 because it's a double check. The white bishop at d3 is also covering h7.

Nov-07-16  Cheapo by the Dozen: Nf6+ forks the king and the mate square at h7.

Further, it uncovers another attacker of h7, so even capturing the knight doesn't stop mate.

Premium Chessgames Member
  Peligroso Patzer: <scholes: <pelligroso> you miss 21 ..Bxf6>

No, in the variation I posted, 21. Nf6+ is a double check, so 21. ... Bxf6 is not a legal move in response.

(I note that the post by <Nullifidian> already addressed this correction, but it did so midway through a comment that was primarily addressed to another point. I thought the correction of this flawed analysis deserved to be addressed in a post specifically and solely addressed to the illegality of 21. ... Bxf6 in response to 21. Nf6+ in the line from a hypothetical position (with the White king on g2) given in my previous post.)

Nov-07-16  MaczynskiPratten: I do like <Once>'s terminology of the Squished Roadkill variation of the Hedgehog defence. Lol, as they say.
Nov-07-16  erismi: <goodevans> I don't think g6 was a fatal mistake and it does have a logic to it. It's purpose is to create a hole for the E8 knight which give blacks other pieces the freedom to maneuver. I personally would not have played g6 I would have selected f5. Completely disrupt the pawn storm and provide white with a choice a) provide a new home for the knight and release black or b) permanently block the diagonal I am so obviously counting on.

I think 19. ... hg4 was just a good old fashioned one move blunder which revealed a mating pattern. If black would've just started trading off pieces and simplified the board instead I think he could've been ok.

Nov-07-16  JASAHA: Sarcasm alert! The real puzzle is how these games make it to this site.
Nov-07-16  drollere: really, any 20. N move will work just fine.

17. ... Ng7 seems like the final blunder. there's nothing dire about hxg6, provided R or Q can get across the 7th rank. 17. ... f5 might have been better.

Nov-07-16  pajaste: somehow thought the king was already on h8 and thought that this is quite hard to see to the end. 5AM.
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