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Paul Motwani vs Petronio Roca
Dubai Olympiad (1986), Dubai UAE, rd 14, Dec-01
Sicilian Defense: Scheveningen Variation. Keres Attack (B81)  ·  1/2-1/2



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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 4 ·  Later Kibitzing>
Apr-08-18  sudoplatov: I also saw Qc3+ and Qc7 followed by d7. I saw Re7 for the first move but that wasn't a check; then I forgot about after Qc3 so I didn't find the other trap.
Premium Chessgames Member
  WorstPlayerEver: 33. Qc3+ Kb8 34. Qc7+ Ka8 35. Re7?

Was my guess too. Not bad for a minute ;)

Premium Chessgames Member
  whiteshark: I've found the right idea <<32...Qxg2 33.Qc3+ Kb8 34.Qc7+ Ka8 > only to blunder it immediately afterwards with <35.Re7??>

click for larger view

Black to move

-5.89 (27 ply) 35...Qg1+ 36.Kb2 Qd4+ 37.Ka2 Qc4+ 38.Qxc4 bxc4 39.d7 Rd8 40.Re8 Rh8 etc

D'oh! D'oh! D'oh!

Apr-08-18  Jack0909: Qc3!! What is wrong with it?
Apr-08-18  Walter Glattke: 37.Kb3 Rh3+ 38.Kc2 R1h2+ 39.Kd1 Rh1+ 40.Re1 +-
Apr-08-18  yadasampati: What is so "insane" about 33. Qc3+ ? It looks completely obvious to me, and i am definitely not an insane player :-)
Premium Chessgames Member
  WorstPlayerEver: The insanity lies in the fact how hard it is to win a winning position.

I mean.. look at the guy's rating and compare it with yours ;)

Premium Chessgames Member
  malt: Started with 33.d7+?, Thought I had it with
33.Rc5+?, Kb7 34.d7 f5 35.d8/Q R:d8 36.Q:d8 Q:g5+ then tried 33.Qc3+ Kb8 34.Qc7+ Ka8 35.d7

Like Motwani, fell for the swindle.

Apr-08-18  gofer: I rejected <33 Qc3 Kb8 34 Qb8 Qc7 35 Re7> as I saw the swindle starting with <35 ... Qg1+>. But, like <Al Wazir>, I didn't see what was wrong with <33 d7+ Kd8 34 Rc5 ...>. It looks fine and really difficult to defend against...

click for larger view

What did I miss!?

<35 ... Qf1+!!!>


click for larger view



Apr-08-18  Cheapo by the Dozen: I was one of those who made the 35 Re7??? error.
Apr-08-18  Cheapo by the Dozen: On the plus side, I did quickly see that a key issue was avoiding the ... Qxc2+ draw threat.
Apr-08-18  Andrew Chapman: Stockfish's second choice is Kb2 followed by a knight promotion and a small advantage. Andrew
Premium Chessgames Member
  agb2002: White has a pawn for a rook.

Black threatens Qg1+ followed by Qb6.

White has the queen, a rook and a pawn to attack the black king, starting with 33.Qc3+ Kb7(8) (33... Kd7(8) 34.Qc7#) 34.Qc7+ (34.Re7 Qg1+ 35.Kb2 Qb6 36.d7 Rd8 37.Re8 Rhh8) 34... Ka8 35.d7 looks winning. For example, 35... Qg1+ 36.Kb2 Qd4+ 37.Ka2 Qc4+ 38.Qxc4 bxc4 39.Re8+ wins.

Apr-08-18  FlashinthePan: <patzer2> If 37...Qxd5 instead of Qc4+ as in your analysis, 38.Qxd5 Rd8 and, after 39.Qe5+ Kg8, 40.Qe6+ Kg7, White apparently can't win, or am I missing something?
Apr-08-18  pajaste: Qc3+ and trying to avoid checkmate..
Premium Chessgames Member
  Jimfromprovidence: An interesting line and a <really good side puzzle> comes after 33 Qc3+ Kb7 34 Re7+ (a nice alternative to 34 Qc7+) 34...Ka8.

click for larger view

White to play and win.

Apr-08-18  Walter Glattke: agb 2002: a grandmaster possibly would play 37.-Rb8 instead 37.-Qc4+, but white could wins then by 38.Qc6+ Ka7 39.Re8 Rh8
Looks like a Fisher book, 40.d8Q Rxd8
41.Re7+ Rd7 42.Rxd7+ Qxd7 43.Qxd7+, and then a pupil still would win this.
Apr-08-18  Walter Glattke: Jimfromprovidence: 35.Qc7 is the position of whiteshark above, where black wins with 35.-Qg1+!, 35.d7 Qg5+ 36.Kb2 Qxe7 / 35.Qe3 wins by threatening Qa7# 35.-Qb7 36.Rxb7 Kxb7 37.d7 Rh1+ 38.Kb2 Rd1 39.Qe8+ Kd7 40.Qxh8 - ... I think so, but my thinking time is short, the players have several hours to think.
Premium Chessgames Member
  Jimfromprovidence: <WalterGlattke> <Jimfromprovidence: 35.Qc7 is the position of whiteshark above, where black wins with 35.-Qg1+!>

No, Walter, look and try again. The white queen is on c3 not c7. And it is white to move, not black. White must not play 35 Qc7 here.

Premium Chessgames Member
  sjunto: I didn't even consider d7; I had 33. Qc3+ Kb7 or 8 34.Qc7+ Ka8 and then nothing better than d7, which means I got a Sunday puzzle, although I was sure I'd screwed up, like I ususally do by Wednesday or Thursday.
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  sjunto: Or when spelling usually.
Premium Chessgames Member
  agb2002: <Walter Glattke: agb 2002: a grandmaster possibly would play 37.-Rb8 instead 37.-Qc4+, but white could wins then by 38.Qc6+ Ka7 39.Re8 Rh8>

Black can play 39... Rh1 to trade this rook for the d-pawn.

However, 39.Re7 looks winning (39... Rb7 40.Qxb7+ Kxb7 41.d8=Q+ and mate in two).

Premium Chessgames Member
  agb2002: <Jimfromprovidence> 35.Qd4 stops Qg1+ and threatens Qa7#. The only defense is 35... Qxg5+ 36.Kb2 Qxe7 but after 37.dxe7 the e-pawn will cost a rook.
Premium Chessgames Member
  Jimfromprovidence: <agb2002> <35.Qd4 stops Qg1+ and threatens Qa7#. The only defense is 35... Qxg5+ 36.Kb2 Qxe7 but after 37.dxe7 the e-pawn will cost a rook.>

Yes. Quite correct.

White also has 35 Kb2 below, with the threat of 36 Qd4 or 36 Qc5, seeing 37 Qa7#

click for larger view

Premium Chessgames Member
  agb2002: <Jimfromprovidence: ...
White also has 35 Kb2>

Most elegant. Black only seems to have 35... Rb8 to cover a7, but 36.Qd4 Rb7 37.d7 wins.

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