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Aleksander Wojtkiewicz vs Robert Kuczynski
Biel MTO op (1990), Biel SUI, rd 10, Aug-??
Slav Defense: Modern Line (D11)  ·  1-0



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Kibitzer's Corner
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Jun-08-08  LoveThatJoker: And - obviously - after I saw Black's 23rd, ...Qc8, I instantly decided upon 24. Qxd7 (for the Queen is immune due to the Back Rank Mate threat).

After I saw 24...Rd1+, I very quickly decided upon 25. Kg2.


Jun-08-08  Chaoticmaster: With all Honesty i seen d5!! as the best move in about a minute but i had to calculate farther and noticed that the rook and queen is undefended. Took me about 10 min to calculate all the variation but its worth it kinda proud that i solved this insane puzzle.
Jun-08-08  awfulhangover: 22.d5!! is a fantastic move. Stupid me never thought of that. As usual, silent moves are the hardest to find.
Premium Chessgames Member
  Once: The theme for this week is the obvious move, so it does not take long to spot d5.

Black has a number of weaknesses in the position - the knight is pinned, the bank rank is weak and both the rook and queen are unprotected. So white has to look for line opening moves.

On my wishlist - I want to post my inactive rook on an open file to take advantage of the weak back rank. I want to move the c6 pawn so that Qe8+ picks up the undefended rook. I want to attack that knight some more or maybe deflect the queen. Black's e and c pawns seem to stop me from doing all of that. So let's look for ways to shift those pesky pawns. Hey presto - d5 comes into view. The rest is calculation.

I must admit that I did not calculate Rd4 as a possible defence. I had mentally written this off with the logic that "any rook moves allow Ra1 and surely I can engineer a back rank mate".

I did spend some time wondering if black is truly lost when white captures the black rook. Black does have a passed pawn and both queens on the board point to potential drawing chances. So I reckoned that the best defence for black was to give up the exchange for a pawn with de Bxe5 cd Qe8+ Nf8 Qxa4. Black's game is grim, but he is still playing. Rd4 just does not work for me.

<al wazir> I too wondered if black has time to make some luft with 23. ... h6. But I think that this is answered by 24. Ra8+ Kh7 25. Rd8 and the pinned knight falls. I think Qc8 was intended to shore up the back rank. But Rd4 left the a file open and it was too late for black.

But frankly all of this is put into context by dzechiel's message. All of our best wishes and prayers for your son's rapid return to health. He has chessplayers all around the world rooting for him.

Jun-08-08  nikiml: my plan was 22. Rc1 Rxd4 23.Bxc6 bxc6 24 Rxc6 Qxc6 25 Qe8+ which takes the black queen
Jun-08-08  johnlspouge: Sunday (Insane): White to play and win.

Material: B for N+P. The Black K is vulnerable to back-rank mates. Only Nd7 can defend against the threat Qe8#, so it has a burden it cannot relinquish. The White Qe7 pins Nd7 to the unprotected Qc7, and Ra4 is unprotected and vulnerable to the fork Qe8+, if Pc6 and Nd7 were removed from the board. Given White is to win, Bf3 and Rf1 are remarkably undeveloped and require activation. In particular, Bf3 would profit from opening the position up with the mobile center Pd4.

As throughout this week, there is really only one candidate.

Candidates (22.): d5

22.d5 (threatening 23.dxe6 fxe6 24.Rd1, winning Nd7)

Black has 2 obvious P captures, both of which culminate in disaster.

(1) 23…cxd5 24.Qe8+ Nf1 25.Qxa4, leaving White with R for 2Ps

(2) 23…exd5 24.Bxd5, threatening both

25.Qxf7+ Kh8 26.Qg8# and

25.Bxf7+ Kh8 26.Rd1 (threatening 27.Rxd7 and 28.Rd8+)

Unless 24…cxd5 25.Qe8+, forking Ra4 as before and leaving White with R for N+P, Black loses Nd7 outright to the eventual move Be6. Both P captures are therefore infeasible. To prevent the threat in 22.d5, and because of the inadequacy of

(3) 23…Ra8 24.dxe6 fxe6 25.Rd1 Rd8 26.Bg4,

winning Pe6 then Nd7, Black must play

(4) 23…Rd4 24.Qe8+ Nf8 25.Ra1 (threatening 26.Ra8 27.Qxf8+)

25…Qd7 26.Qb8

and now, <I thought> Black has no defense to Ra8.

In a strange fit of blindness, I overlooked that 26.Qe7 holds the Black back rank together. This puzzle is a fitting end to a week of obvious candidates with subtle follow-ups. The path to White victory here was much narrower than I expected.

Jun-08-08  znprdx: Black's Queen is tied up holding its knight so White has time for 22.Rd1 (which will be held by B at f3) ...22Qc8 (frees the Queen) 23. e4 Nf6 seems to yield zilch.

There must be some effective way to exploit Black's back rank weakness. 22.Rb1!? Rxd4? 23. Rxb7 Qx[R]b7 (or drops the knight) 24. Qd8+ Nf8 25. Qx[R]d4 very pretty but seems to be completely unforced since Black only needs to play...22.g6

Equally slow seems 22. Be4 assuming Rxd4 23. Qe8+ Nf8 forced 24. Bxh7+ Kx[B]h7 25. Qx[N]f8 Wait a moment maybe right away 23. Bxh7+ Kx[B]h7 the knight remains pinned but Black has Qd6 24. Qh5+ Kg8 25. Ra1 begins to qualify as 'insane'.

Somehow combining 2 or3 ideas which fail can lead to one which succeeds. These are often very difficult and depend upon the correct move order as well as hoping one's opponent is overwhelmed by the perceptual deception which results from the changing positions.

All this to say...I quite possibly do not have a clue. This is sure to be interesting.

Jun-08-08  johnlspouge: <<stukkenjager>: If you didn't see this line, you are no way near a solution [snip] >

I agree this line is critical. In fact, Toga II 1.3.1 gives a variant as best play, leading to a modest winning advantage for White:

24…Qc8 24.dxe6 Ne5 [fxe6 25.Rd1]

25.Rd1 Ra8 26.exf7+ Nxf7 27.Rd7 Qe8 28.Rxb7

Jun-08-08  Quad Fifties: Dzechiel,my brother...I hope all the best for your son and your family.
Jun-08-08  Sularus: I believe this is the first time i have ever solved an INSANE puzzle. in less than five minutes too !

(though i failed to consider black's reply Rd4)

Jun-08-08  hedgeh0g: Got it. Surprisingly easy for an Insane.
Premium Chessgames Member
  al wazir: <stukkenjager: If you didn't see this line, you are no way near a solution:

22.d5 Qc8 23.dxe6 Ne5 24.Bg4! f6 25.Rd1 Ra8 26.Bh5! Kh8 28.Bf7+ Kh8 29.Qxc5) 27.f4 Ng6> 28.Bxg6 hxg6 29. Rd7 Qg8 (29...Qf8? 30. Qxf8 Rxf8 31. e7) 30. Rxb7 Rc8 31. Qf7 c5 32. Qxg6 c4.

I'll bet dollars to doughnuts that Wojtkiewicz didn't see it ahead of time either.

Jun-08-08  WickedPawn: Dzechiel, we are all hoping for your son's speedy recovery. In the meantime, thank you once more for your always entertaining and instructional analyses.
Premium Chessgames Member
  playground player: <dzechiel> I join the others in praying for your son's recovery.
Jun-08-08  skemup: I was thinking about 22Rc1 Rxd4 23Ra1 Qc8 24e3 Rd2 and King moves to go away black rook from d line. Probably not good..
Jun-08-08  crwynn: I guess the difficulty of a puzzle can depend on how many moves you have to find to claim a "solution". To me, if 22.d5 cannot be met by xd5 or some kind of counterplay, then Black is clearly lost, no more moves are needed. Except maybe a response to 22...e5, which is just 23.bc bc 24.Bc6. Endgame puzzles, or puzzles where material is very uneven, are different because a position can "look bad" but still be drawn or even winning, so you have to work everything out. I thought this was one of the easier Sunday puzzles.
Jun-08-08  Samagonka: <dzechiel> I pray for your son's quick and sure recovery in the mighty name of our Lord Jesus Christ. I have personally experienced the healing powers that are in prayer, so be assured that your faith is not in vain.

PS. Thanks again for your elaborative contributions...always a pleasure for me to read through. Hope you stay with CG long enough.

Premium Chessgames Member
  al wazir: <Once: 23...h6 . . . is answered by 24. Ra8+ Kh7 25. Rd8 and the pinned knight falls>

You're right. (But black is arguably better a ♘ down than the outcome in the game.)

Jun-08-08  MiCrooks: Rd4 not a particularly good try at a defense. Ra1 is crushing. But other tries pretty lame as well. After Qc8 all you really need to see is that dxe6 nets you your pawn back in a much superior position. Even with Ne5 you can still simply play exf7 Nxf7 Rd1 (obvious at that point) with Rd7 coming and a dominant position. The other moves dropping the exchange or full rook are pretty clear as well.

One of the easier insane positions we've had for a while. There really was no other tries than d5 in the position, so given it was a problem it was not hard to find. If it had been my game on the other hand I'm not so sure I would have found it, though on move 22 it may well have been home preperation.

Jun-08-08  JG27Pyth: JG27Pyth: Nice puzzle... seemed on the easy side for an insane sunday, not that I got it...but I gave up quick because it's Sunday... awww who am I kidding, I wasn't going to get this in a million years... funny how completely ineffective Rd1+ was... when black played 24... Rd1+ I thought, my god, how does he answer this... then 25.Kg2 "oh, right, of course, Rd1+ solves _nothing_"

All the best to your son Dzechiel. Wishing him a speedy recovery.

Jun-08-08  apple pi: First move wasn't bad, but then...
Jun-08-08  zenpharaohs: Insane all right. I didn't get far. I spent a lot of time trying to find a way to make 22 Qf8 work. Then I looked at 22 e3 and 22 Rd1 and 22 d5. Nothing really worked out.

So I threw in the towel and fired up Rybka, who informs us:

22 d5 Qc8
23 dxe6 Ne5
24 Rd1 Ra8
25 exf7+ Nxf7
26 Rd7 Qe8
27 Rxb7 Qxe7
28 Rxe7 Kf8
29 Rc7 Nd8
30 Bxc6 Ra1+
31 Kg2 Rc1
32 Rc8 Rxc6
33 Rxd8 Ke7

with a value of +2.15.

Well OK, it's a good advantage for white. I still don't "get" this as a problem outcome, but that can happen with these game derived problems.

Jun-09-08  234: Saturday puzzle <30. ?> Jun-07-08 Judit Polgar vs Anand, 1991
Premium Chessgames Member
  kevin86: After the final moves,in the immortal words of Victor Borge's inflationary language-

Black's position was "UN-ELEVEN-ABLE

Premium Chessgames Member
  patzer2: For the difficult Sunday, June 10, 2008 puzzle solution, White plays 22. d5!! See <johnlspouge>'s Toga II analysis as well as <zenpharaohs> Rybka analysis for suggested "best play" lines.
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