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Slobodan Martinovic vs Slavoljub Marjanovic
Yugoslavia (1980)
Formation: King's Indian Attack (A07)  ·  0-1


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sac: 31...Qxh4+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Premium Chessgames Member
  agb2002: Black has a bishop and a knight for the bishop pair and a pawn.

White threatens 32.Rxe7.

The position of the white king invites to play 31... Qxh4+:

A) 32.gxh4 Nxd3+

A.1) 33.Kh1 Nxf2#.

A.2) 33.Bf4 Bxf4+ 34.Kh1 Nxf2#.

A.3) 33.f4 gxf3+ and mate in two.

B) 32.Nh3 Nf3+

B.1) 33.Bxf3 Qxh3+ 34.Kg1 gxf3 35.Qf1 (35.Qxf3 Re1#) 35... Re1 and mate soon.

B.2) 33.Qxf3 gxf3 - + [Q vs B].

B.3) 33.Kh1 Bxg3 (33... Re1+ 34.Qxe1 Nxe1 35.gxh4)

B.3.a) 34.Bxf3 Qxh3+ 35.Kg1 Qh2+ 36.Kf1 Qxf2#.

B.3.b) 34.fxg3 Qxg3 35.Bxf3 Re1+ 36.Qxe1 Qxe1+

B.3.b.i) 37.Ng1 gxf3 - + [Q+2P vs R+B] (38.Bxh6 Qh4+).

B.3.b.ii) 37.Kh2 g3+ 38.Kg2 Qf2+ 39.Kh1 Qh2#.

B.3.b.iii) 37.Kg2 gxf3+ 38.Kxf3 Qh4 39.Nf2 Nf6 - + [Q+P vs R+B].

B.3.c) 34.Rxa7 gxh3 35.Qxf3 Re1+ 36.Bf1 Rxf1#.

C) 32.Bh3 Nf3+

C.1) 33.Nxf3 Qxh3+ 34.Kg1 gxf3 transposes to B.1.

C.2) 33.Kh1 Bxg3 looks similar to B.3.

Premium Chessgames Member
  diagonalley: <ang dalubhasa: that is used for tiebreaks> ... thanks chum, but i am also interested to discover how the scores are calculated ... anybody know(?)
Premium Chessgames Member
  diagonalley: <JimNorCal>...oh, i see now... many thanks :-)
Premium Chessgames Member
  morfishine: <31...Qxh4+>

If White accepts, he's mated on move 33

If White declines, he's mated soon enough


May-21-15  Abdel Irada: Wait. This isn't Monday, so a reflexive, no-look queen sac can't be right.

But of course it is. :-D

May-21-15  arun.pulak: didnot think about the queen sac and the subsequent royal fork but thought there was some future in pushing the f pawn for black since the black queen on h4 meant piece up for black.anyways black has made for himself a winning position i feel..
Premium Chessgames Member
  Penguincw: Damn it, I got the wrong move order: 31...Nf3+ 32.Bxf3 Qxh4+. Unfortunately, 32.Nxf3, and then what?
May-21-15  wooden nickel: Isn't this game similiar to a King's Indian Attack, this could be an interesting line for Black?! 31..Qxh4+! starts the fun, White could try and survive with 32.Bh3, but gxh3 offers another queen sac, if 33.gxh4 then Ng4+

click for larger view

34.Kxh3 Nxf2+ 35.Kg2 NxQd1
and Black wins back the queen and is up a piece!

Premium Chessgames Member
  Longview: got it I think. Queen sac 31....Qxh3+ 32. gxh Nxd3 + (discovered) 33. K-h1 or h3 Nxf2+ forking the Queen regaining the piece and opening the e file for the e8 rook.

Missed the f4 blocking move. Wow, the most moves I have gotten so far!

Premium Chessgames Member
  Sally Simpson: White did indeed play a KIA v the Sicilian, Black hit back with KID type Queen sac.

Oddly enough this KID Queen sac did not involve Rooks, usually you have one ready to skim to the h or g-files, just two minor bits and a pawn.

Bet White thought he was doing OK when he played 30.Nb7 and then getting a Rook on the 7th with tempo.

click for larger view

The Queen sac should be the first you look at, it's the top forcing move.

Minor doubt here. White has just played 33.f4

click for larger view

If White takes E.P then the Black King has h3 to run to too.....No Nf2 covers that as well...and even g5 if the black f-pawn were not there.

click for larger view

Now Thats's an M.P. you don't see everyday

May-21-15  houtenton: <greed and death> if white had to play, what do you think of Rb7xe7?
May-21-15  houtenton: Let's go back one move. Suppose white was aware of the deadly threat, what he should play then? Maybe Bf4 or Rxe5 will be the answer. I hope anyone will look at this.
Premium Chessgames Member
  patzer2: Interesting positional Sicilian game with lots of twists and turns leading to the 31...Qxh4+! Queen sac combination solving today's Thursday puzzle. Here's a look with Deep Fritz 14:

<26...g4?!> Stronger is 26... Qg4! 27. hxg5 Ne5 28. R5b3 Qh5+ 29. Kg1 fxg5 30. Qf1 Nf6 31. Nxe5 Bxe5 (-0.86 @ 21 depth).

<27...f5?!> Better is 27...Ba6! 28. R5b2 Ne5! = (-0.17 @ 26 depth).

<28...Ne5?> Fritz indicates this is a losing move.

Putting up more resistance is 28... a6! when play might continue 29. Nxc5 Qe7 30. Rb6 Qxh4+ 31. Nh3 gxh3 32. Bxc6 Nf6 33. Bf3 Ng4+ 34. Bxg4 Qxg4 35. Qxg4 fxg4 36. Ne4 Bf8 37. Bxh6 Bf5 38. Bg5 Ra8 39. Bf4 to (-1.24 @ 23 depth)

<29. Nxc5! Qe7 30. Nb7 Bxb7>

<31. Rxb7??> This loses and misses a winning move.

Instead White has 31. Bxb7! (+1.71 @ 21 depth) for the win as 31...Qxh4+?? is now refuted by 32. gxh4 Nxd3+ 33. Kg2 (+13.59 @ 18 depth).

<31...Qxh4+!> After white's 31. Rxb7?? blunder (overlooking 31. Bxb7! ) , Black pulls off a swindle with 31...Qxh4+!

<32. gxh3> This allows mate-in-four.

Putting up more resistance but still losing is 32.Bh3 gxh3 33.R7b2 Ng4+ 34.Kh1 Qh5 35.Qf1 Bxa3 36.Rd2 Bxc1 37.Rxc1 h2 38.Nh3 Ne7 39.Nf4 Qg5 40.Ra2 Ng6 41.Nxg6+ Qxg6 42.Rxa7 Qc6+ 43.f3 Re3 (-3.28 @ 23 depth).

<32...Nxd3+ 33. f4 gxf3+ 0-1> White resigns in lieu of 34.Bf4 Bxf4+ 35.Kh3 Nf2#.

P.S.: Quickly saw 31...Qxh4+ 32. gxh4 Nxd3+ led to mate for my Thursday puzzle solution, but pondered a while trying to figure out the possibilities after 32. Bh3 or 32. Nh3.

May-21-15  LIzzard: I'm embarrassed to say I got it by accident today. I was so enamored with Nf2+ creating a fork after the queen sacrifice, that I didn't realize it was mate as well!
May-21-15  BOSTER: <hadi706>, < M.Hassan>. 31...Qxh4+
32.Nh3 Nf3 +
What about 33 Kh1?.
If Bxg3 fxg3 Qxg3 Bf4
After <PB> 33...Qh5 white has a tempo playing Bb2.
Premium Chessgames Member
  Jimfromprovidence: There is an interesting swindle chance after 31...Qxh4+ 32 Nh3 Nf3+ 33 Kh1 Qh5 34 Bb2!

click for larger view

The tempting 34...Re1+? seeing 35 Qxe1 Nxe1 loses immediately to 36 Bxd4+.

click for larger view

Instead black has to play either 34...Bxg3 or 34...Nf6.

May-21-15  fenno: I found 31. - Qxh4+ almost immediately, but did not find the best (wooden nickel's) line for 32. Bh3.
Premium Chessgames Member
  thegoodanarchist: Wow, one move by Black and White's position collapses!

He then proceeds to walk into checkmate, but even 32.Nh3 drops a piece or more.

Premium Chessgames Member
  kevin86: How about this one! A queen sad, double check, en passant capture...need I say more!
Premium Chessgames Member
  chrisowen: Biffed e7 around ash h4 am flumed:

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Premium Chessgames Member
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Premium Chessgames Member
  CHESSTTCAMPS: White has a material of the bishop pair plus an extra pawn for B+N. White has also has a protected rook on the 7th rank that looks strong, but there is a major vulnerability.

31... Qxh4+!!

.... shows that the white pieces do not defend the king effectively against a sneaky minor piece attack:

A) 32.gxh4 Nxd3+! 33.f4 (Bf4 Bxf4+ 34.Kh1 Nf2#!) gxf3+ 34.Bf4 Bxf4+ 35.Kh1(|h3) Nf2#!

B) 32.Bh3 Nf3+ (gxh3 winning a piece is simplest) 33.Nxf3 Qxh3+ 34.Kg1 gxf3 35.Qf1 (Qxf3 Re1#) Re1 36.Qxe1 Qg2#

B.1) 33.Kh1 Bxg3 34.fxg3 Qxg3 35.Nxf3 gxf3 and the double threat of 36... Re1+ and Qxh3+ can't be met.

C) 32.Nh3 Nf3+ 33.Kh1 (Bxf3 Qxh3+ etc) Bxg3 34.fxg3 Qxg3 35.Bxf3 (otherwise Qh2#) Qxh3+ 36.Kg1 gxf3 37.Qf1 Re1 wins

Time for review....

Premium Chessgames Member
  Bubo bubo: With the B-N-battery aiming at the white king, 31...Qxh4+ looks promising:

A) 32.gxh4 Nxd3+ 33.f4 gxf3+ ep 34.Bf4 Bxf4+ 35.K~ Nf2#

B) 32.Nh3 Nf3+ and now

B1) 33.Bxf3 Qxh3+ 34.Kg1 gxf3 and mate after either 35.Qxf3 Re1+ or 35.Qf1 Re1.

or B2) 33.Kh1 Bxg3 34.fxg3 Qxg3, and White can avoid a mate as in line B1) only by sacrificing his queen with 35.Qg1.

C) 32.Bh3 Nf3+, with C1) 33.Nxf3 Qxg3+ as in B1) or C2) 33.Kh1 Bxg3 as in B2) or finally C3) 33.Kg2 Qh5!, and White has no sufficient defense against the threat of Nxg1, as 34.Nxf3 Qxh3+ or 34.Bxg4 fxg4 35.Nxf3 Qh3+ fail as in B1).

A nice non-trivial but not too difficult puzzle!

Premium Chessgames Member
  Jimfromprovidence: <Bubo bubo> and <CHESSTTCAMPS> In Your respective B2 and C lines, white has 35 Bf4.

click for larger view

May-22-15  sp12: <agb2002> a little change to one of your analysis:

B.3.b) 34.fxg3 Qxg3 35.Bf4

seems to stop further attacks as Black has to save his queen.

e.g. 35... Qh4 36. Bxf3 wins for White

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