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Manfred Keller vs Hans Joachim Jaser
FRG-ch16 sf corr (1977) (correspondence), Germany
King's Indian Defense: Four Pawns Attack. Florentine Gambit (E77)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
May-28-15  SchachMann: Why doesn't 29. Bh6 Rxd8 30. Qxd8++ work?
May-28-15  diagonalley: wow! this position is almost like it had been composed ... there are numerous tries to get at the black K, but black appears to have "all bases covered" ... as usual, <diagonalley>'s efforts shadowed that of <al wazir>, completely missing white's deft 31st move. great puzzle though :-(
May-28-15  get Reti: Got it all the way through. I'm so proud of myself!

To SchachMann: If 29. Bh6 Rxd8 30. Qxd8++ then 30... Nxd8.

May-28-15  morfishine: One Queen eliminates the bishop <29.Qxd4> 29...Nxd4 30.Bh6 Ne6 while the other Queen takes out the Knight <31.Qxe6>

*****

May-28-15  dfcx: The only piece stopping white from play Bh6 is the black bishop. So white wins with
29.Qxd5! Nxd5
30.Bh6 Ne6
31.Qxe6
Now black can't prevent white from playing Qf6 next, forcing mate. A.31...fxe6 32.Rxf8#
B.31...other moves 32.Qf6 with mate to follow
May-28-15  gofer: Bd4 is a pain the butt, so lets get him out the picture...

29 Qdxd4 Nxd4 (cxd4 Bh6 mating)
30 Bh6 ...

White gives up the queen for a mating threat that is just too good.

30 ... Nf5
31 Rxf5

30 ... Ne6
31 Qxe6

~~~

Yep...

May-28-15  Boerboel Guy: <SchachMann: Why doesn't 29. Bh6 Rxd8 30. Qxd8++ work?>

it's not mate....how about 30....Nxd8!!!

May-28-15  Nick46: <Phony Benoni: In the Good Old Days,..> P.B. for me you are one of the "gods" of this site (if not THE god) and it's not often one can "one-upmanship" god .. so forgive me for being the pedant that I am, but the correct spelling is "Gardez!" sans u. Forgive, forgive ...
May-28-15
Premium Chessgames Member
  offramp: The Florentine Gambit. Oh my Gharshk!
May-28-15  Eduardo Leon: Easy! 29.♕dxd4 ♘xd4 30.♗h6 ♘e6 31.♕xe6, and now:

A) 31...fxe6 32.♖xf8#

B) 31...♕b2 32.♕e7

C) 31...(anything else) 32.♕f6

May-28-15
Premium Chessgames Member
  Penguincw: Very interesting. I think this is the first puzzle I ever saw where the side to move has 2 queens.

Anyway, I am now 0/4 this week, but I did consider 29.Qdxd4 Nxd4, and moving the queen to safety.

The line I was hoping for was 29.Qxf8+ Kxf8 30.Bh6+ Kg8 31.Qf3, and trying to battle out this queen ending, where white has a rook for knight and 3 pawns.

May-28-15
Premium Chessgames Member
  Sally Simpson: Two Queens sacs! This should have been a Monday puzzle spread over two weeks.

When I saw the two Queens I was thinking the 'this is too easy' mob will be having a field day in the forum.

Then you spot it's not quite that easy.

But it does go like clockwork and using the look for forcing moves first method works a treat.

May-28-15  YetAnotherAmateur: 29. Qdxd4 seems to do the job.

A) 29. ... Nxd4
30. Bh6 Qxg2+ (because black can get in a spite check) 31. Kxg2 any
32. Qg7#

B) 29. ... cxd4
30. Bh6 any
31. Qg7#

C) 29. ... Ne5
30. Qxe5 Qxg2+
31. Kxg2 any
32. Qh8#

Other responses are pretty much the same as (C).

May-28-15
Premium Chessgames Member
  PawnSac: Hmmm. well, i suppose its a "medium".
It seems to me if the typical monday
puzzle is a 1 star, this would be a 1.5

Nevertheless...
Q8xd4! Nxd4
Bh6
if then ..Nf5 Rxf5 or ..Ne6 Qxe6!

ok now to look at the game and see if black resigned after Qxd4

May-28-15  CHESSTTCAMPS: Black has a knight + three pawns for white's second queen. Initially I was looking at Qxf8+, but soon realized that it is the conventional dark-square weakness of a king-side castle (with missing fianchettoed bishop) that black needs to be worried about:

29.Qdxd4! eliminates the defending DSB and the rest is easy:

29... Nxd4 (cxd4 30.Bh6 forces mate sooner) 30.Bh6 and now

A) 30...Nf5 31.Rxf5 Qb1+ (Qb2 32.Qxb2; all other moves allow 32.Qg7#) 32.Rf1 Qxf1+ 33.Qxf1 with large material advantage.

B) 30... Ne6 31.Qxe6! Qb2 (To prevent 32.Qf6. Of course 31...fxe6 32.Rxf8#) 32.Rxf7! Rxf7 (Qb1|c1+ 33.Rf1+ wins) 33.Qe8+ Rf8 34.Qxf8#

B.1) 31... Qb6 32.Rxf7 wins similarly to B main line, but 32.Qxb6 also wins.

Time for review...

May-28-15  CHESSTTCAMPS: Agree with a number of the pundits that a double-queen sac (especially with the 2nd queen offered twice as in <Jims> illustrated line) is a great rarity, one that all can enjoy.
May-28-15
Premium Chessgames Member
  kevin86: Brilliant! White sacrifices TWO queens. Then he mates with a bishop and rook (the divided functions of a queen)Last round.
May-28-15  fokers13: VERY EASY in comparison to wednesday and tuesday.

hope the rest of the days are like this.

May-28-15  jith1207: <JimfromProvidence> Thanks for the insight, that looks clever and solid approach. On a side note, if you are from Providence, RI, I got to say that I loved visiting your town.
May-28-15  Clodhopper: It always happens this way on Thursday. I see the first couple of moves, and I'm thinking "this ought to go", and then: "damn, 30 ... Ne6 refutes."

The solution ain't 29 Qxd4, it's 31. Qxe6!

May-28-15
Premium Chessgames Member
  Jimfromprovidence: <jith1207> Yes, that is my hometown. You never forget your roots.

However, school and career took me to So Cal; I've been a resident here since 1987.

May-28-15  vajeer: The game continuation is the best but I think 29. Qxf8 should win too. After 29...Kxf8 30. Bh6+

If A. 30...Kg8
31. Re1 Qb1 (Ne7 or moving the queen to 8th rank loses a piece and White should win the end game) 32. Qf1 Qb8
33. Qb5 should win.

If B. 30...Ke8
31. Re1+ Ne5
32. Bf4 and white should again be able to win the piece.

May-28-15
Premium Chessgames Member
  Bubo bubo: That was a perplexing puzzle, at least for me!

I saw the key move nearly immediately (after a very short attempt to set up a pattern akin to yesterday's GOTD). But when I realized that the "unstoppable" mate after 29.Qdxd4 Nxd4 30.Bh6 isn't unstoppable, I hastily rejected this line as a mere try.

Instead I wasted much time on calculating 29.Qxf8+ Kxf8, only to discover that neither 30.Bh6+ Ke8! nor 30.Qd6+ Kg7! works.

Now, on the brink of resigning, I returned to the first line, and at long last I detected the pin of the Pf7, allowing 30...Ne6 31.Qxe6. Black can postpone mate with 31...Qb2, but after 32.Qe7 he is out of luck.

Btw: Is this the first puzzle featuring multiple queens?

May-30-15  patzer2: Here's my look at the game and the Thursday, May 28, 2015 puzzle with Deep Fritz 14:

<14. d6 Be6> Stronger here is 14... c4! when play might continue 15. Qd5 (15. Nd5 Nbc6 16. Bh4 Qc5+ 17. Kh1 Nd3 18. Bxd3 Qxd5 19. Bxg6 Qxd1 20. Bxf7+ Kxf7 21. Raxd1 Bxb2 ) 15... Qb6+ 16. Kh1 Be6 17. Qd2 Nbd7 18. Nxe5 Bxe5 19. Rad1 Qa5 20. Bf3 Rab8 21. Bf4 Bg7 22. Bh6 a6 23. Bxg7 Kxg7 to (-0.57 @ 21 depth).

<22...Qa5??> This is Black's decisive error. Instead, 22...Qxe2 23. Bxe2 = (+0.30 @ 25 depth) keeps it about level.

<23. Bg4!?> This wins, but it's slow & difficult and overlooks a much stronger reply.

A much quicker win here is 23. Rxd7! Bxd7 24. Bd5 Rf8 25. Qe7! (+7.82 @ 24 depth) with the decisive threat 26. Bxf7+ .

<28...Nc6?> This loses immediately.

Putting up much more resistance is 28... Ng4! 29. Qde7 Bxf6 30. Qxb7 Bxg5 31. Qc7 to (+1.47 @ 26 depth)

<29. Qdxd4!> This solves the Thursday, May 28, 2015 puzzle.

Weak and only good for equality is the tempting 29. Qxf8+? Kxf8 30. Bh6+ Ke8 31. Re1+ Ne7 32. Qd6 f6 33. Bc1 a5 =.

<29... Nxd4 30. Bh6 Ne6 31. Qxe6 1-0>

Black resigns in lieu of 31...Qb8 32. Qf6 Qe5 33. Qxe5 f6 34. Qe7 Rf7 35. Qe8+ Rf8 36. Qxf8#.

Jun-05-15  jith1207: <JimfromProvidence> Awesome, yes, you are right, never forget your roots.
search thread:   
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