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Andres Rodriguez Vila vs Gustavo Kanefsck
Mar del Plata op 38th (2007), rd 4, Apr-02
Bird Opening: Gunsberg Defense (A02)  ·  1-0



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Kibitzer's Corner
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Premium Chessgames Member
  al wazir: <Cheapo by the Dozen: I'm having difficulties in my first pass at the puzzle, as per: 30 Qb4 Qxb4 31 Rxd8+ Bc8 32 Rxc8+> Don't feel bad. I also missed 32. Bxd5+ Kb8 33. Bf4+ Qd6 34. Bxd6#.

Well, all right. Go ahead and feel bad.

An interesting try is 30...Bc8, which avoids an immediate mate.

Oct-30-14  M.Hassan: "Medium"
White to play 30.?
White is a pawn down and has Bishop pair


31.Rxd8+ Bc8
32.Bxd5+ Kb8
33.Bf4+ Qd6

B) 30..........Qd7
31.Qf8 Nxf6
32.Rxd8+ Qxd8
33.Qxd8+ Rxd8
34.Bxf6 Rg8
and White is a whole piece ahead
checking the game
Game continued like the B) line

Premium Chessgames Member
  An Englishman: Good Evening: Not the hardest puzzle, but aesthetically very impressive. That is paralysis.
Premium Chessgames Member
  agb2002: White has the bishop pair and a pawn for a bishop and a knight.

The black queen protects the rook on d8. Therefore, 30.Qb4:

A) 30... Qxb4 31.Rxd8+ Bc8 32.Bxd5+ Kb8 33.Bf4+ Qd6 34.Bxd6#.

B) 30... Qd7 31.Qf8 Rc8 32.Rxc8+

B.1) 32... Bxc8 33.Bxd5+ Kb8 (33... Qxd5 34.Qxc8#) 34.Bf4+ Qc7 35.Qd6 Qxd6 36.Bxd6#.

B.2) 32... Qxc8 33.Qxc8+ Bxc8 34.Bxd5+ Kb8 (34... Bb7 35.Re8#) 35.Bf4#.

C) 30... Qb8 31.Qf8 Rc8 32.Rxc8 Bxc8 (32... Qxc8 transposes to B.2) 33.Bxd5+ Bb7 34.Re8 wins.

D) 30... Qc7 31.Qf8

D.1) 31... Rb8 32.Rxb8+ Qxb8 33.Re8 wins.

D.2) 31... Rc8 32.Rxc8+ Bxc8 (32... Qxc8 transposes to B.2) 33.Bf4 Qb(d)7 34.Qxc8+ Qxc8 35.Bxd5+ Qb7 (35... Qc6 36.Bxc6#) 36.Re8#.

E) 30... Nh6 31.Qxd6 wins.

Oct-30-14  diagonalley: i think i got it... kinda... sort of... -ish (cool puzzle)
Oct-30-14  morfishine: Positionally, what is evident, is the awkward position of the Black King. Having been maneuvered into the corner, the King has no move available in the event of a check on the back rank due to his WSB occupying <b7>

<30.Qb4> This forcing move aims to break communication between the Black Queen and the rook on <d8>

30...Qxb4 (if 30...Qd7 31.Qf8 is fatal)

31.Rxd8+ Bc8 32.Bxd5+ Kb8 33.Bf4+ Qd6 34.Bxd6#


Oct-30-14  mike1: got it but am completely puzzled by the most moves Black played....
Premium Chessgames Member
  hoodrobin: <An Englishman: Good Evening: Not the hardest puzzle, but aesthetically very impressive. That is paralysis.> Cool.
Oct-30-14  Cheapo by the Dozen: Oh, I see what I missed. Main line:

30 Qb4 Qxb4
31 Rxd8+ Bc8
32 Bxd5+ Kb8
33 Bf4+ and mate next.

If Black tries to avert the diversion, we could get:

30 Qb4 Qd7
31 Qa4 Bc6
32 Rxd8+ Qxd8
33 Qxc6+

and White is up a piece and, more important, about to play Bf4+.

Last line to check is:

30 Qb4 Qc7
31 Bf4 Qd7

and we can transpose into the previous line.

Oct-30-14  Cheapo by the Dozen: I looked at the game line too, but I think mine is fine even so. :)

<al wazir>, I don't feel bad, as I found the line when I returned to the problem. :)

And while you're right about Black averting immediate mate with 30 ... Bc8, he's quickly down two pieces, so he might as well resign.

Oct-30-14  cocker: 31 Qa4 seems better than the move played.
Premium Chessgames Member
  Oxspawn: I kept trying 30. B (or Q) f4 which fails after black plays Q d7. Very nice finish.

However, the move that most impressed me was 22. Ng6. It took me ages to see why black could not simply take with the pawn (23. f7). Seeing/not seeing that kind of position in advance is the difference betwen a chess player and me I think.

Oct-30-14  stacase:    

Black's Queen is overworked, and the protecting Rook is pinned. Ha!

Premium Chessgames Member
  patzer2: There's more than one win in today's (30. ?) Thursday puzzle.

My attempt was 30. R1e6! fxe6 31. f7!, which according to Fritz 12 wins after 31...Nf6 (diagram below)

click for larger view

32. Rxe6! Qc7 33. Bxf6 Qxf7 34. Qe3! (+2.73 @ 20 depth per Fritz 12).

However, this win is more complicated and isn't as straightforward or strong as the game continuation with the deflection and pin combination 30. Qb4! Qd7 31. Qf8! (+7.01 @ 20/48 depth per Fritz 12).

Oct-30-14  morfishine: <patser2> I also spent some time musing over <30.R1e6> before finding 30.Qb4

Nice job!

Premium Chessgames Member
  Penguincw: I got 30.Qb4 and 30...Qd7, but 31.Qf8 I might've gotten if I saw the board after move 30.
Oct-30-14  dfcx: White to move
30. Qb4 deflecting the queen
A. 30... Qxb4? 31. Rxd8+ Bc8
32. Bxd5+ Kb8 33. Bf4+ Qd6 33. Bxd6#

B. 30...Qb8 31. Qf8 to be by Rxd8 and Re8 winning the queen for a rook. The best defense is 31...Nxf6 32. Rxd8 Rxf8 33. Rxb8+ Kxb8 34. Bxf6 winning a piece.

C. 30...Qc7/d7 31. Qf8 and black is worse off than case B above

This Thursday puzzle is easier than Wednesday's. Make it two weeks in a row.

Oct-30-14  leow: My idea was Re6 (followed by f7) but it'is to difficul for me
Oct-30-14  Cheapo by the Dozen: The end of the game score above is odd. It says Qf8 or Qa4, almost as if Black resigned a move earlier and neither was played.
Oct-30-14  Cheapo by the Dozen: In the 31 Qf8 line, it looks like 31 ... Nf6 might avert a quick mate, although it leaves Black a fatal piece down.
Premium Chessgames Member
  kevin86: White's queen move at 30 puts BLACK's QUEEN in danger as the rook is pinned. Black must yield and the queen marches in to victory.
Premium Chessgames Member
  doubledrooks: I found 30.Qb4 Qd7 (or Qc7) 31.Qf8
Oct-30-14  AvidChessMan: I was thinking 30.Qf4 instead of b4, which is the better move. I did not see the unprotected f8 square and the advantage of moving the queen there.
Premium Chessgames Member
  Longview: Well I can agree with <AvidChessMan>. I saw neither, either. I looked at 30. Bf4 initially eventually considering R1e5 and R1e6. But then 30 Q f4 was my final consideration primarily trying to remove the guard on the black R(d8) and get the White Queen into the fray more directly. I figured Bxd5 would come into play as key later.

I liked the Qb4 move, initially thinking it would have the reply 30...Qxb4 which took the black queen away and out of the contest. I saw the reply played as best under other scenerios with both of my Bf4 and Qf4 lines as a better defense for Black but I missed the strength of the use of the f8 square entirely.

Well I wrote out 6 lines and didn't get the one used! Well, at least White seemed to stay better....compensation???

Oct-30-14  TheBish: A Rodriguez Vila vs G Kanefsck, 2007

White to play (30.?) "Medium", White is up a pawn.

I recognized this right away as a possible decoy sacrifice, which turned out to be correct.

30. Qb4! Qd7

Or 30...Qxb4 31. Rxd8+ Bc8 32. Bxd5+ Kb8 33. Bxf4+ Qd6 34. Bxd6#. Also losing badly is 30...Rxe8 31. Rxe8+ and Black's queen falls.

31. Qf8 Rc8

Also losing is 31...Rxe8 32. Qxe8+ Qc8 (32...Qxe8 33. Rxe8+ Bc8 34. Bxd5+ Kb8 35. Bf4#; 32...Bc8 33. Bxd5+ Kb8 34. Bf4+ and mate next) 33. Qxc8+ Bxc8 34. Bxd5+ Kb8 (34...Bb7 35. Re8#) 35. Bf4#. Maybe trickiest is 31...Nxf6 when simply 32. Rxd8+ Qxd8 33. Qxd8+ Rxd8 34. Bxf6 wins a piece.

32. Rxc8+ Bxc8

Or 32...Qxc8 33. Re8.

33. Bxd5+ Kb8 34. Bf4+ and wins.

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