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Jonas Wyss vs Bilel Bellahcene
Mulhouse IM (2012), Mulhouse FRA, rd 7, Jul-06
Sicilian Defense: Old Sicilian. Open (B32)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Oct-24-12
Premium Chessgames Member
  whiteshark: <Djoker: Looks like monday.> My thought, exactly.
Oct-24-12  Abdel Irada: <Djoker: Looks like monday.>

Shh! Don't tell anyone! It's Groundhog Day.

Oct-24-12  zb2cr: Found this one quickly.
Oct-24-12  JG27Pyth: Alternate move order, 25...b3 before Rxa4 works as well.
Oct-24-12
Premium Chessgames Member
  Phony Benoni: <JG27Pyth> After <24...Qxa4+ 25.bxa4 b3>:


click for larger view

Can White survive with 26.Qf4 exf4 27.Rd4?

<Cibator, Abdel Irada> Corrections acknowledged.

Oct-24-12  Harvestman: <<Phony Benoni>Can White survive with 26.Qf4 exf4 27.Rd4?>

Interesting. I'm playing with the idea of responding 27..Rd8 and picking off the d-pawn and tryng to double rooks on the a-file together with Bc2 if I need it. I haven't yet decided if white can defend against this idea without losing at least an exchange.

I'm not using a board or computer, and I'm pretty rubbish, so my ideas should be treated as suspect.

Oct-24-12  Harvestman: Hmm, looks like 27...Bc2 first is better, then 28...Rd8.
Oct-24-12  standardwisdom: Straight forward. I mean it.
Oct-24-12
Premium Chessgames Member
  Oxspawn: I wrote this down as I thought this through and I am posting it in case anyone cares about the processes that led me to what I hope is the right sequence via a less than fruitful detour.

Both sides have potential attacks. However, I note that if the white knight was absent, black could bludgeon the way to victory by

<24. Qxa4+,
25. Bxa4 Rxa4++>

Since the white knight is there, I am tempted by
<24. ...Rc8>
thinking that if the knight stays in position, black can take it, and even if white retakes with its rook, the queen sacrifice on a4 still works. And because 25 ….Rxc1 delivers check, 25. g4 does not help white. But what to do after

<24. ...Rc8
25. Na2 ?>

Now the rook cannot go to c3 and threaten to undermine the white pawn defence without being taken. …

<25. ...Rc3
26. bxc3 bxc3
27. Re2 b2
28. g4 >

not sure if any of these moves are optimal but don’t think black quite pulls this off, especially as the white king now has b2 to run to. How about attack first and follow up with the back ran rook afterwards

<24. …….. Qxa4+
25. bxa4 Rxa4+
26. Na2 b3! (!)>
this move surprises and delights me – I didn’t see this coming…. Now I don’t see that anything can stop
<27 Rxa2++>
In this sequence the white pawn on b2 prevents any defenders from coming to the rescue and 27. Rd3 just delays things by one move, as do any of the various white queen suicide attacks. So this is my submission… and I never needed the back rank rook. I spent a half hour on this position and felt like I was peeling away layers of obfuscation to arrive at some understanding. Probably means I missed something!

Oct-24-12
Premium Chessgames Member
  Oxspawn: Well lots of others got it quicker than I did, but I got it. And <Abdel> it's not groundhog day; and <Djoker> and <White shark> it's not Monday. It's blooming well, Wednesday, halfway to 'insanity'. Yea.... If I wasn't on a diet I'd award myself a cream bun. As it is an apple will have to do.
Oct-24-12  chesskidnate: by the way, alternate move order of 26...b3 appears to fail due to 27.Nd3 where white blocks the bishops control
Oct-24-12
Premium Chessgames Member
  Phony Benoni: <chesskidnate: by the way, alternate move order of 26...b3 appears to fail due to 27.Nd3 where white blocks the bishops control>

Oh....

I shall be quiet now.

Oct-24-12
Premium Chessgames Member
  playground player: Sometimes the best way in is just to break the door down.
Oct-24-12
Premium Chessgames Member
  chrisowen: Bind along queen a-line should be quite straight forward ad libs 24.Qxa4+ king apparently stuck for room so enable 25.bxa4 Rxa4+ inter-juxtapose nc1 preventing immediate mate sigh all forlorn it ok in solder 26.na2 b3 0l.
Oct-24-12
Premium Chessgames Member
  kevin86: the little pawn move decides it...black will deliver mate on the a-file...THERE IS no escape.
Oct-24-12  ranzo77333: Got it easily but I was wondering, would the move of white to a3 instead of a4 be better off for him?? Just looking through what happens after that move I see white ending up a rook and queen.
Oct-24-12  ranzo77333: Crap I meant I see white ahead a rook and or queen.
Oct-24-12  Castleinthesky: This was a Monday-ish puzzle, because there was really only one possible move and then everything was forced.
Oct-24-12  BOSTER: <Phony Benoni> < Basically an Anastasia Mate set-up>.

"Anastasia's Mate-is a variation on the simple Rook-knight checkmating pattern and mating net with an open h file."

I don't think when <escape> square under control the bishop -this is Anastasia's mate.

Oct-24-12  waustad: Wyss he Bellahcene about it? Since this has been a puzzle, it probably won't be a GOTD, despite the pun potential.
Oct-24-12  geeker: Kind of easy for Wednesday, but the slight subtlety with 26...b3 was nice.
Oct-24-12  EXIDE: At first tried very hard to trap the white Queen. If the black pawn on g file could be moved the black rook could attack the Queen. However that obviously does not work, so then that left the Queen sacrifice to try out. Not sure I would have seen this on the board in actual play.
Oct-24-12
Premium Chessgames Member
  Jambow: Ok I'm on a roll here another sum minute solution. ;0]
Oct-24-12  rudiment: Too easy for Wednesday! But I will wilfully ignore objective analysis and take this as evidence of progress. Dissenters: shhh...
Oct-24-12  Abdel Irada: <chesskidnate>: I see you beat me to the punch. :-)
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