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Daniel Abraham Yanofsky vs Lionel Joyner
CAN-ch (1965), Vancouver, rd 3, Jun-23
Sicilian Defense: Kan. Knight Variation (B43)  ·  1-0



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Kibitzer's Corner
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Mar-17-15  stst: Two main routes:
If (i) ...... Nxg4, 30.Bxf6 Nxf6 White wins the exchange If (ii) ..... f4, 30.Rxe5 dxe5, 31.Bxe5 pins R & K, Kg7 31. Rxf4 and Black lost the R without any compensation

29.Rxe5 right from start dxe5
30.Bxe5 Kg7
31.Rd1 Kf7 or Be6
32.Bxf6 Kxf6
and White wins the exchange, ending with R vs B.

time to check ...

Mar-17-15  Jedzz: <Cheapo by the Dozen>, why take on f6 right away? None of black's pieces are going anywhere soon. You can win both the a- b-pawns by playing 33. Rb6.
Mar-17-15  abuzic: Position on move 24 makes a good problem:

click for larger view

24...Qxb6 25.Bxf5
24...Qb8 25.Rxf5
24...Qc6 25.Bxf5 or 25.Rxf5

Mar-17-15  stst: with Rd6, the net effect would still be R vs B for the ending
Mar-17-15  morfishine: First: <29.Rxe5> forcing 29...dxe5 30.Bxe5 Kg7

and now <31.Rd1> the move that kills; White threatens the undefended Bishop 32.Rxd7+ as well as doubling up on the pinned rook via 32.Rd6


Premium Chessgames Member
  agb2002: White has a rook for a knight and a pawn.

The alignment of the white bishop and Black's king and rook invites to play 29.Rxe5:

A) 29... dxe5 30.Bxe5 Kg7 31.Rd1 Bc6 (say; 31... Kf7 32.Bxf6 wins a rook) 32.Rd6 + - [R vs P].

B) 29... Bb5 30.Rxb5 is a massacre.

Premium Chessgames Member
  Once: Hmm. A little bit trickier than it looks. We start the position with a material imbalance. We are already ahead by the exchange but black has an extra pawn.

We have the fairly obvious forced sequence of 29. Rxe5 dxe5 30. Bxe5 Kg7. That's okay for us - we exchange off a pair of pieces (bishop and rook vs knight and rook) each and white wins a pawn. So we are left with our original exchange advantage.

But that doesn't seem particularly exciting or puzzle-worthy. We've won a pawn and exchanged equal four pieces. We ought to win a bishop versus rook endgame, but they can sometimes be troublesome if the bishop can set up a fortress. There ought to be something more in the position.

That's when we extend the forced sequence to include 31. Rd1.

click for larger view

The threat is Rd6 attacking the pinned rook, so black really has to play 31...Be6. Now we have another little forced sequence of 32. Rd6 Kf7.

It seems as if Black is hanging on to the position by his fingertips. He is about to lose the exchange, but he might yet get frisky if he can park his bishop on c6 and get his kingside pawn majority rolling.

33. Rb6!

click for larger view

This is the move (33. Rxf6 followed by Rb6 also does the trick). Black can't untangle his pieces or save his rook, and white wins both the b and h pawns. 33...g5 34. Rxb7+ Kg6 35. Bxf6 Kxf6 36. Rxh7

A tricky little Tuesday, with a bit more depth than usual. Enjoyed that.

Mar-17-15  Cheapo by the Dozen: <Jedzz>,

I was assuming that Black could move his rook as soon as he broke the pin. But you're right; Black is actually in a rather drastic bind, as <Once> explains later on.

Mar-17-15  TheaN: Tuesday 17 March 2015 <29.?>

White is up the exchange for a pawn. As compensation black can uphold a fortress-like position at the moment and white has to think of a useful break. He can momentarily give up the advantage to create a ♗>♖>♔ pin, which is very strong if the opponent has an opposite colored bishop only.

White wins at least a pawn with <29.Rxe5 dxe5> there are no sensible alternatives because of the discovered attack or check <30.Bxe5 Kg7>. After 31.Bxf6+ Kxf6 white wins the pawn back whilst still up an exchange.

However, that is not satisfying for a Tuesday puzzle. There must be something more, and that's in keeping up the pin on the Rf6. The strong part about a ♗>♖>♔ pin is that it's very hard to break without addtional defenders. Only the king can break it if he's standing close and can continue defending the rook. Black can do that now, but it's white to move.

<31.Rd1!> Δ Rxd7+ & Rd6. If white can get Rd6 out whilst attacking the rook on f6, it's down and out for black. So, <31....Be6>. Ironically, blocking the white rook's scope on d6 also blocks the black rook of f6, so if black were to break the pin with 32....Kf7, the rook still can't move.

Given that, white wins crucial pawns in this ending with <32.Rd6 Kf7 33.Rb6! > and white will capture on b6, h7 and eventually a6, all while still gaining back the exchange on f6. This in total makes this a Tuesday puzzle.

Mar-17-15  TheaN: One other crucial point I forgot to mention is that after 32.Rd6, white is not just threatening Rb6 but also Rxe6, so it makes Kf7 forced. Otherwise black might be able to stick to the kingside majority with g5 and Kg6. Even that would still be lost, but a tad bit harder to win for white.
Premium Chessgames Member
  Bubo bubo: White already has the exchange for a pawn, and he soon wins more material:

29.Rxe5 dxe5 (otherwise Black has simply lost a knight) 30.Bxe5 Kg7 (only way to protect the pinned rook) 31.Rd1, and the double threat of Rxd7 and Rd6 will lead to a net gain of a rook for White.

Mar-17-15  CHESSTTCAMPS: In this endgame position, black has knight plus pawn for a rook. This might give fighting chances for a draw in some circumstances, but the lineup of king, rook, and knight on the diagonal of white's bishop is unfortunate. White can finish decisively with 29.Rxe5! (Bxe5 dxe5 30.Rxe5 Bc6 31.Re7 should be won but would take longer) dxe5 30.Bxe5 Kg7 31.Rd1 Bc6 (Kf7 32.Bxf6) 32.Rd6 and black is done.
Mar-17-15  CHESSTTCAMPS: Good for <stst> ,<once>, and TheN for pointing out 31.Be6, which I missed.
Mar-17-15  zb2cr: <Once>, good explanation.
Mar-17-15  eblunt: Slightly disappointing puzzle, since even without the real point of the puzzle - 31 ♖d1, white could just play 31 ♗xf6 and has a very straightforward endgame win with a ♖ for ♗ advantage.
Premium Chessgames Member
  Penguincw: My first thought was 29.Bxe5 dxe5 30.Rxe5, and white is up the exchange. However, it would be a lot easier if white can exchange off black's rook, so I found 29.Rxe5 dxe5 30.Rxe5 Kg7. I didn't see 31.Rd1, but 31.Bxf6+ right away would win as well.
Premium Chessgames Member
  doubledrooks: 29. Rxe5 dxe5 30. Bxe5 Kg7 31. Rd1 Be6 looks winning to me.
Premium Chessgames Member
  kevin86: White will be up the exchange. the text gains the bishop for a rook up.

My move is flawed: 29 ♖xe5 dxe5 30 ♗xe5 ♔g7 31 g4 and black replies g5

Premium Chessgames Member
  sfm: <eblunt: Slightly disappointing puzzle, since even without the real point of the puzzle - 31 ♖d1, white could just play 31 ♗xf6 and has a very straightforward endgame win with a ♖ for ♗ advantage.>

Well, but not nearly as straightforward as with 31.Rd1, that grabs an extra pawn (on b7).

It is also educational: if you pin a piece you should consider not grabbing it at first - let your opponent lose a tempo stepping out of the pin.

So - also a good puzzle! :-)

Mar-17-15  eblunt: <sfm> good point, whilst not a good "pure puzzle" with a black and white answer, it's a very instructive passage of play.
Premium Chessgames Member
  Mating Net: I looked at the position and it seemed as if the dark squares from e3-h8 were illuminated by neon. This immediately suggested Rxe5.
Mar-17-15  Halldor: The deadly pin! I saw the exchange sacrifice right away, but had to think for a while what to do with it. Then I saw it was a killer!
Mar-17-15  olinart: Abe taught me and my friends to play chess at an elementary school in Winnipeg. Nice to see one of his games featured here. This one is so typical - develop in the center, get through the middle and get your advantage in exchanging to the end game. His observation was that most players were weakest in the endgame, so if you had solid skills there you had a good shot.
Premium Chessgames Member
  gawain: Thanks, <Once>! I was stuck after 30 ...Kg7.

This seems rather subtle for a Tuesday. Good puzzle, though.

Mar-17-15  dfcx: looked for a forced mate/win right off, did not find any.

Settle down with
29.Rxe5 dxe5 30.Bxe5 Kg7 31.Rd1 Be6 32.Rd6 Kf7 33.Rb6

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