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Milan Matulovic vs Hans-Joachim Hecht
EUR-chT (Men) 3rd (1965), Hamburg FRG, rd 10, Jun-16
Spanish Game: Morphy Defense. Mackenzie Variation (C77)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 2 ·  Later Kibitzing>
May-19-15
Premium Chessgames Member
  Check It Out: 35.Qa3 looks like a good shot. Check mates of wins the queen.
May-20-15  lentil: Qa3 is indeed a nice shot. I like the Qf8+ threat.
May-20-15
Premium Chessgames Member
  FSR: Having seen CIO's comment earlier today, I'm going with 35.Qa3.
May-20-15
Premium Chessgames Member
  thegoodanarchist: yeah, 35. Qa3 is fun. So far it's unanimous
May-20-15
Premium Chessgames Member
  An Englishman: Good Evening: All of which makes 33.Rc3 a clever little trap. What impresses me is that White resisted the temptation to play Nxf6+ for so long.
May-20-15  Cheapo by the Dozen: This sure looks like a divert-the-queen/back rank mate puzzle. OK. 35 Qa3 runs afoul of 35 ... Qd1+ -- oh wait, it actually doesn't, because rooks move backwards. On the other hand, 35 ... c2 is a bit hard to deal with -- oh, wait, 36 Qf8+ looks good.

OK. The move is 35 Qa3, with the dual threats of Qf8+ -- with mate next move -- and Qxa4, aka QxQ.

If

35 Qa3 Qxa3
36 Rxe8+ and mate next

And if

35 Qa3 Rxd8
36 Qxa4 Rd1+

it turns out that queens can move backward as well.

May-20-15  lost in space: 35. Qa3 wins. Either mate (Qf8+) or we get a queen for a rook.
May-20-15  M.Hassan: "Medium/Easy"
White to play 35.?
White is a pawn down.

Black King can be mated by one row check of Queen or Rook:

35.Qa3
Black Queen loves to give check and gain tempo but can only check on d1 which is guarded by White Rook <if...Qxa3 36.Rxe8#>

35..........Qc6
36.Qf8+! Rxf8(forced)
37.Rxf8#

May-20-15  dfcx: White would mate with Rxe8 except the black rook is protected by its queen.

35.Qa3! threatening Qxa4/Rxe8/Qf8+

A.35...Qxa3 (or leaving the a4-e8 diagonal) 36.Rxe8 Qf8 37.Rxf8# B.35...Qb5/c6/e7 36.Qf8+ Rxf8 37.Rxf8#
C. 35...Rxd8 36. Qxa4

May-20-15
Premium Chessgames Member
  devere: 35. Qa3 Qd4+ 36. Rxd4 Bxd4+ 37. Kf1 c2 38. Nc5 Rc8 39. Nd3 and while Black will win the White knight for his passed pawn, White can still grind out a win.


click for larger view

But if 39...Be3 40.Nc1?? Bxc1 41.Qxc1 a4! Black wins!


click for larger view

May-20-15
Premium Chessgames Member
  agb2002: White has a knight for a bishop and a pawn.

Black threatens 35... Rxd8.

The black king is in danger, the black queen is defenseless and protects the rook. These details suggest 35.Qa3, threatening 36.Qf8+ and 36.Qxa4:

A) 35... Qxa3 36.Rxe8+ Qf8 37.Rxf8#.

B) 35... Qb5(c6) 36.Qf8+ Rxf8 37.Rxf8#.

C) 35... Rxd8 36.Qxa4

C.1) 36... Rc8 37.Qd7 looks winning. For example, 37... Rb8 38.Qc6 h6 39.Nxc3 + - [Q+N vs R+B].

C.2) 36... Rb8 37.Qc6 as in C.1.

D) 35... Bd4+ 36.Kh1 does not seem to improve Black's position.

E) 35... Qd4+ 36.Rxd4 Bxd4+ 37.Kf1

E.1) 37... Rc8 38.Nd6

E.1.a) 38... Rc7 39.Nb5 with the triple threat Qf8#, Nxc7 and Nxd4.

E.1.b) 38... Rb8 39.Nb5 c2 (39... Bf6 40.Nxc3 + - [Q+N vs R+B]) 40.Nxd4 Rb1+ 41.Ke2 h6 (41... c1=Q 42.Qf8#) 42.Nxc2 wins.

E.2) 37... c2 38.Nc5 (38.Nf2 Bxf2 39.Kxf2 Rc8 40.Qc1 a4 wins for Black) 38... Rc8 39.Nd3 Be3 40.Ke2 c1=Q 41.Nxc1 Bxc1 42.Qxa5 [Q+P vs R+B] although I'm not completely sure that White can win this ending.

May-20-15  HaydenB: Wasn't Matulovic the infamous "J'adoubovic" from the '60s? Did he touch the Rook first and then move his Queen?
May-20-15
Premium Chessgames Member
  perfidious: <HaydenB: Wasn't Matulovic the infamous "J'adoubovic" from the '60s?>

The very man himself.

May-20-15  fenno: I found 35. Qa3 quickly, but was too hasty to judge it as a winning move. I have no excuse why I did not check what happens after 35. - Qd4+ nor 35. - Rxd8...
May-20-15  Steve.Patzer: I am with the move 35....Qd4+ after Qa3
May-20-15
Premium Chessgames Member
  piltdown man: Easy today.
May-20-15
Premium Chessgames Member
  patzer2: Some Chess tactics are like old friends. You recognize them immediately and feel comfortable being with them.

Today's Wednesday 35. Qa3! immediately jumped out as a tactic, which, like an old friend, was very familiar to me. "Hey there Queen deflection and back rank mate threat. Haven't seen you in a while. What's new?"

In this case, what's new was the interesting follow-up after the expected 35.Qa3! Rxd8 36. Qxa4 Rc8 with 37. Qd7! .

I would have played the slightly weaker, but still winning, 37. Qc2 .

Both moves (either 37. Qd7!or 37. Qc2) win, but Fritz indicates stopping the passed pawn without the blockade after 37. Qd7! Rb8 (37...Ra8 38. Qd5! ) 38. Qc6! is stronger.

White can muck it up with 37. Qxa5?? (diagram below):


click for larger view

Here, after 37. Qxa5?? (diagram above), Black turns the tables and snatches victory from the jaws of defeat with 37...Bd4+! (not 37...c7? 38. Qxf5 ) 38. Kh2 c2 .

Black's decisive mistake was 33...dxc3?? Instead, 33...Qd7! to (diagram below)


click for larger view

was strong and likely winning for Black. Play after 33...Qd7! (diagram above) might continue 34. Rc5 Qxf5! 35. Qa3 (not 35...Rxa5?? 36. Bh2+ ) 35...h6 36. Rxa5 Rde8 to with an extra pawn and the initiative for Black.

P.S.: <devere><agb2002> Thanks for the analysis of 35...Qd4+! which, according to Fritz, is the strongest defense. I didn't consider 35...Qd4+ in my initial calculations, but after 35...Qd4+ 36. Rxd4 Bxd4 37. Kf1! c2 38. Nc5! (+3.42 @ 20 depth, Fritz 12) White has it under control.

May-20-15  kelu: @agb2002: if d) 35... Bd4+ 36.Kh1? Qd1+ (and saves the game). 36.Kh2 is correct
May-20-15  wooden nickel: <An Englishman: Good Evening: All of which makes 33.Rc3 a clever little trap...> Yes indeed... on the other hand, what if Black doesn't fall for it? ... for instance after 33... Qd7, I'd prefer Black!
May-20-15  morfishine: <35.Qa3> wins on the spot; if 35...Qb5, White mates with the laser 36.Qf8+

*****

May-20-15  Bubo bubo: The <free-floating queen motif> again:

White plays 35.Qa3!, attacking the unguarded black queen and threatening Qf8+ with mate next move. Black has no way to cope with these threats, since his queen has to protect the Re8. He may try 35...Bd4+ (hoping for 36.Kf1?? Qd1#), but after 36.Kh2 Be5+ 37.Kh1 he has run out of checks and out of luck.

Not as clear as the prototype of this motif O Bernstein vs Capablanca, 1914, but nevertheless very nice!

May-20-15  CHESSTTCAMPS: Black has bishop+pawn for a knight and may feel good about his prospects with the advanced, protected passed pawn on c3. But there is a little back rank problem to deal with...

35.Qa3!!

A) 35... Qxa3? 36.Rxe8#

B) 35... Qb5|c6 (or c2) 36.Qf8+ forces mate.

C) 35... Rxd8 36.Qxa4 and black can't hang on to the passed pawns, e.g. 36...Rc8 37.Qd7 Ra8 38.Qc6 and c3 must fall.

D) 35... Bd4+ 36.Kh2! (Kf1?? Qd1#) Be5+ 37.Ng3! (g3?? Qc2+ followed by 38... Rxd8) Bxg3+ 38.Kxg3 and black is out of tricks.

Time for review...

May-20-15  arun.pulak: black could have drawn by shuttling between a4 and c6...i feel
May-20-15
Premium Chessgames Member
  Penguincw: 35.Qa3, and if black takes the queen, then white takes the rook. If black takes the rook, white takes the queen. Also, the queen is guarding d1, so there is no mate threat on d1.

Seems easier than yesterday IMO.

May-20-15
Premium Chessgames Member
  Sally Simpson: Like FSR I too checked out Check It Out's post from yesterday so no need to solve today. I have a day off.

Check It Out is obviously the seventh son of a seventh son and is using his psychic powers to post solutions to the puzzles before they appear.

Check It Out if you are reading this post six number between 1 and 49. I'll use them in the next UK lottery and split the winnings 50/50 - go for it.

(and whilst you are here give us the solution to tomorrow's puzzle.)

Thank You.

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