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Judit Polgar vs Ferdinand Hellers
Biel Interzonal (1993), Biel SUI, rd 5, Jul-20
Sicilian Defense: Najdorf. Amsterdam Variation (B93)  ·  1-0



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Kibitzer's Corner
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Jul-18-07  dzechiel: White to move. Medium difficulty. White has one pawn for the exchange, and black's king is a little exposed.

Of course the move 36 Rxd5 jumps out at you because black can't take the rook with 36...exd5 as 37 Nxd5+ picks up the queen.

But then you see that black has 36...Rg1 pinning the white queen, and you MIGHT be tempted to abandon the line.

But! Don't lose faith in your original move! The line would go: 36 Rxd5 Rg1 37 Rd7+ Kf7 38 Rxf7# and black never gets a chance to take the white queen.

Black has other replies on move 36, but they don't work any better.

Jul-18-07  noTALent: <MostlyAverageJoe:> <noTALent: What's the blunder?>

<Black can play Qc6+, escaping the fork... (C), you forgot... (38 ... exd5).

Except as noted, the following line has to be followed EXACTLY by the white to guarantee a draw (confirmed by backward/forward analysis with Hiarcs):

36. Rxd5 Rxc2+ 37. Kxc2? Qc6+ 38. Kb1 <or Kb2> exd5 39. Nxd5+ <g7 also has a chance> Kf8 40. Nf6 fxg6 41. Qd8+ Kf7 42. Qg8+ Ke7 43. Nd5+ Kd7 >

Didn't see that. What's Hiarc's opinion about 40. Qh1 in the above line?

Jul-18-07  Wolfgang01: 36. Rxd5 Rxc2+???
37. Qxc2!!

37a. … Qg1+
38. Kb2 and black can either pin the Q with Rg2 or take exd5 or fxg6 lost in all variations …

37b. … Rc3
38. Rd7+ and known mates …

Jul-18-07  tallinn: To all those that did not calculate every possible black answer after Rxd5: do not worry. For choosing Rxd5 OTB it is sufficient to see the knight fork (and the fact that black has no zwischenzug to escape it) and the mate threat starting with Rd7+. E.g. after Rxc2+ suggested here white can even play Kb1 (which is in fact stronger then Qxc2) and continue to enjoy the suffering of black looking for an escape from the mate threat - as nothing has really changed. The only reasonable alternatives to exd5 are Rc7, fxg, Rxg6 and Kf8 as all of those moves try to defend mate without loosing the queen. So the other part of the complete solution is to see the rook sac on f7 and the final mate with black king on h6. Then you understand that black is forced to take the rook after Rxd5. In fact I did choose Rxd5 after seeing that black is not really able to defend the d7 square. Is was just a feeling that with a white rook or queen on d7 black would be dead soon.
Jul-18-07  jaykingmusic: I like: 18. RxN, gxR, 19. Qxh5, ???, 20. Rh1
What can Black do?
Jul-18-07  ahmadov: <whatthefat> Ok, then I will be more careful in the future...
Jul-18-07  bettermove: Nice analysis everyone.Thanks.
Rxd5- the start of the solution maybe easy but the rest isn't so easy. This makes chess good fun and tricky! (Why not do away with B20-B99 except for B22?-the best answer to 1.e4 c5(!) I'm sure noone would miss that much! LOL!)
Jul-18-07  VargPOD: This was difficult. As <whatthefat> said, first move was obvious. But it's not so easy to see the line
36...Rxg6 37.Rd7+ Kf8 38.Rxf7+ Kxf7 39.Qd7+ Kf8 40.Qxc8+ Kg7 41.Qg8+ Kh6 42.Qh7# (same with 36...fxg6) and complications following 36...Qe3+ and 36...Rxc2+.
Jul-18-07  TrueBlue: finally something I can solve! I believe the following line is forced ....

36. Rxd5 fxg6 37. Rd7+ Kf8 38. Rf7+
Kxf7 39. Qd7+ Kf8 40. Qxc8+ Kf7 41. Qd7+ Kf8 42. Qe8+ Kg7 43. Qg8+ Kh6 44. Qh8#

Jul-18-07  TrueBlue: of course, there are other lines where black loses his queen of the bat or gets mated even sooner, or are equivalent (e.g., Rxg6), bla, bla, bla.
Jul-18-07  Tactic101: First move is pretty obvious, then the rest is a little tricky. Tough for a Wednesday.
Jul-18-07  Aspirador: <Do you mean to suggest that men and women play against each other?!> Men and women play against each other in a lot more ways than you can imagine.
Jul-18-07  TrueBlue: <<Do you mean to suggest that men and women play against each other?!> Men and women play against each other in a lot more ways than you can imagine> I like it better when they play WITH each other!
Jul-18-07  dghins: Black can salvage a draw.
Instead of 32.....d5 do ....dxe5
33.Rd7...Kf8 and eventually there comes ...e4, Qxe4...Qb5, Nh7...Ke8, Qxe6...fxe6, Nf6+...kf8, Nh7+...kg8 ad nauseum, voila draw
Jul-18-07  MikeChesss: Is there a name for a move where you move a piece to a square where it "can not" be captured because the opponent exposes himself to a tactic like a fork or checkmate? Other than a good move, of course.
Jul-18-07  Fezzik: @<Mikechess>

I can't think of the name of a move right off hand, but the piece is often said to be "immune". That is, it's immune from capture. I hope this helps.

Jul-18-07  Waitaka: Got only the first two moves. Missed 38 Rxf7+...
Jul-18-07  zb2cr: Managed to do this one. Quite proud of myself, given the complexity of the position.
Jul-18-07  RonB52734: <resty: isnt 36...Qe3+ possible?> I also wonder what would follow after 36...Qg1?
Jul-18-07  YouRang: Got it, after a minute or so. I noticed that black was threatening ...Rg1 (pinning our queen), but then I found 36. Rxd5, seeing that 36...Rg1? is met by 37. Rd7+ Kf8 38. Rxf7#.

Of course, the rook is safe from 36...exd5 because of the queen winning knight fork (which also kills the ...Rg1 threat).

Polgar had a mighty resourceful knight there!

Jul-18-07  unsound: After 36...Qg1, 37.Rd7+ Kf8 38. Rxf7 mate is a good follow-up.
Jul-18-07  Jack Kerouac: Check this out, chess community...
Chess on roller coasters!
Jul-18-07  aazqua: Very nice. She is a primo chess vixen.
Jul-18-07  bogo78: <MikeChesss: Is there a name > I believe you can say that the piece in question becomes "taboo", but I am not really sure its chesically correct.
Jul-18-07  YouRang: <MikeChesss: Is there a name for a move where you move a piece to a square where it "can not" be captured because the opponent exposes himself to a tactic like a fork or checkmate? Other than a good move, of course.>

If it's a pawn, it is often called a "poison" pawn. I don't know if the term applies to other pieces, but I don't see why it shouldn't.

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