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Gerd Roeder vs Detlef Heinbuch
Bundesliga (1981/82), FRG, rd 13, May-16
Sicilian Defense: Alapin Variation. Barmen Defense (B22)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Dec-17-13
Premium Chessgames Member
  LucB: <Once>

That was good; very entertaining!

:D

Dec-17-13  pericles of athens: Oh my Gerd!

Looked at Rh8+ first and sure enough that's it.

Dec-17-13  Marmot PFL: Way too easy. Black had to be really greedy to play 13...hg5?
Dec-17-13
Premium Chessgames Member
  kevin86: I saw an immediate mate in four:16 ♖h8+ ♔xh8 17 ♕h5+ ♔g8 18 ♕h7+ ♔f8 19 ♕h8#

easy as pie (not pi,which is VERY complicated:3.1415926535897932384626433...)

Dec-17-13
Premium Chessgames Member
  PawnSac: <Marmot PFL: Way too easy.>

agreed. its a monday problem on tuesday, and i don't usually bother with mondays any more. Just give it a quick glance on the front page and move on. But the Rh8+ play is a typical idea to get the Q to h5 with tempo. An idea that all should know. And if they didn't before, now they do.

<Black had to be really greedy to play 13...hg5?>

worse yet was 15...Nxe5??
for better or worse he had to try something like g6 or f5 to blunt the attack (block the diagonal and take h5 away from the Q) but of course white can still demolish the defense with..

15. Ne5 g6 16. Nxg6 fxg6 17. Bxg6 Rf8 18. Qh5 or

15. Ne5 g6 16. Nxg6 fxg6 17. Bxg6 Bxg5 18. Qh5 Kf8 19. Qh8+ Ke7 20. Rh7+ Kd6 21. Nb5#

15. Ne5 f5 16. gxf6 Bxf6 17. Rh8+ Kxh8 18. Qh5+ Kg8 19. Qf7+ Kh8 20. Ng6+ Kh7 21. Ne7+ Kh8 22. Qh5#

15. Ne5 Bxg5 16. Qh5 Bh6 17. Qxf7+ Kh8 18. Rxh6+ gxh6 19. Ng6#

there really is no defense. The position is totally lost because of so many blunders. white simply smashes his way thru.

Dec-17-13  FlashinthePan: <NewLine> Thanks for this continuation, which I didn't see.
Dec-17-13  JG27Pyth: Cybe:<First serious white’s error was 13. a3. If 13… hg, 14. hg, 14… Ng4! (not Nd5), the game is hard for both sides, but black wins.>

Accepting the sac with hg looks really strange to me from a 2300 player. It looks like the famous "fishing pole" sac with a 2300 on the line! I don't see your improvement -- 14...Ng4 --leaving Black winning.

White has 15.Bh7+ (which should win back the piece with an attacking initiative.) 15...Kf8 16.Bf5 (16...exf5?? 17.Rh8#) Nh6 17.gxh6 gxh6 (...exf5? 18.h7) unless I'm much mistaken white is better.

I'm not convinced I've found the best continuation for white, either.

Dec-17-13
Premium Chessgames Member
  FSR: <chesssalamander: ... I thought about 16. Qh5 first, but 16....Ng6 saves Black.>

I think that Black would have to try 16...f5 in that case. Your 16...Ng6? doesn't help: 17.Qh7+ Kf8 18.Qh8+ Nxh8 19.Qxh8#.

Dec-17-13  BOSTER: <PB The rook sacr it is the only way to win>. is This is not easy to prove after 16.Nxd5 B xg5 17.Qh5
Dec-17-13  Morttuus: A bit too fast,aint it, for the highest competition in Germany? (At least I guess it is the highest one:-) ) But why not,it can happen.This puzzle is great for beginners and patzers like me,to realise,how worthy such a free highway to the king can be.

Poor black king.So many pieces and no one to protect him...

Dec-17-13  YouRang: <Once> Exactly right, but alas, not everyone appreciates the delicacies of sadistic chess.
Dec-17-13  MiCrooks: Hmmm...Black has a comfortable game here...he can take the piece with Ng4 instead of Nd5, or he can just let it sit there and make a more useful move than White's silly a3! What's the point? Please take my piece oh please oh please oh please!!! :)
Dec-17-13  BOSTER: <Marmot PFL really greedy 13...hxg5?> Ng4 is an answer.
Dec-17-13
Premium Chessgames Member
  whiteshark: Monday-like
Dec-17-13  MountainMatt: This is a Monday-level puzzle that just takes one move more than usual to complete. 16. Rh8+ Kxh8 17. Qh5+ Kg8 18. Qh7+ Kf8 19. Qh8#
Dec-17-13
Premium Chessgames Member
  Penguincw: This puzzle is easier than yesterday's.
Dec-17-13  lost in space: <<whiteshark:> Monday-like>

I love Mondays!

16. Rh8+ Kxh8 (only move) 17. Qh5+ Kg8 (only move) 18. Qh7+ Kf8 (only move) 19. Qh8#

Dec-17-13  Nullifidian: Mate in 4: 16. ♖h8+ ♔xh8 17. ♕h5+ ♔g8 18. ♕h7+ ♔f8 19. ♕h8#
Dec-17-13
Premium Chessgames Member
  Domdaniel: When I first looked at the puzzle diagram position, I assumed Black was a weak player. But no: he had a 2300 rating, which in 1982 was close to IM strength. How could a Master-level player get into such a mess in 16 moves?
Dec-17-13
Premium Chessgames Member
  Once: <Domdaniel: How could a Master-level player get into such a mess in 16 moves?>

According to my mate Fritz, the turning point comes after 14. hxg5


click for larger view

Fritzie claims that black is comfortably ahead by -1.33. In other words, white's bishop sac was not sound. But it takes nerves of steel (or silicon) to defend the mate threats whilst still hanging on to the extra material.

Black goes wrong with the natural looking 14...Nd5. Fritz reckons that he would have kept his advantage with 14...Ng4. This looks like a precarious post for the knight, but apparently it's quite safe. If white tries to dislodge the Ng4 with 15. Ne5 black has either 15...Ncxe5 or 15...Bxg5.

So how did a strong player get into this mess? I think he was objectively right to grab the white bishop because the sac was unsound. But then the follow up requires precise moves. 14...Ng4 seems a very counter-intuitive move to me, so perhaps it's not too surprising that he missed it.

Reminds me a little of Simon Webb's advice on how to trap heffalumps - lead them into a complex position where there are chances for them to go wrong.

Dec-17-13  BOSTER: <Domdaniel. How get into such a mess.> Chess demands exceptional concentration, otherwise we are ready to get into a mess.
Dec-17-13  dark.horse: “The most powerful weapon in Chess is to have the next move.” --David Bronstein

Here White sacs a rook to have the next move.

Dec-17-13  Sequoia: <chesssalamander: I thought about 16. Qh5 first, but 16....Ng6 saves Black. If Bxg6, fxg6, giving the King a flight square.>

Nope. 17. Qh7+ Kf8 18. Qh8+ and mate next move.

Dec-17-13  M.Hassan: White is down by a Bishop & a Knight for a pawn

16.Rh8+ Kxh8 (forced)
17.Qh5+ Kg8
18.Qh7+ Kf8
19.Qh8#

Dec-17-13
Premium Chessgames Member
  Gilmoy: It's Pipe Sac Week! Marshall vs Burn, 1900

(and by Sunday night Burns still won't have his lit)

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