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Erling Mortensen vs Lars Karlsson
13th North Sea Cup (1988), Esbjerg DEN, Jul-??
French Defense: Winawer. Poisoned Pawn Variation General (C18)  ·  0-1



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sac: 20...Rxf3 PGN: download | view | print Help: general | java-troubleshooting

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Jun-01-08  openingspecialist: <MAJ> oh of course you are right. All my analysis has been on Rxf3
Premium Chessgames Member
  pittpanther: This puzzle was a bit too easy for Sunday in my opinion. I concur with those that say it was Thursday/Friday material. I have played the Winawer a lot over the last 20 years and am familiar with themes attacking the c2 square so I saw it almost instantly (which I rarely do on Sunday!).
Jun-01-08  zooter: I never look at Sundays, but I did see that 20...Rxf3 followed by 21...Nb4 clears the bishop to come to a4 with a mating attack...

didn't look too deep and also may have been tempted to play 21...Nxd4 instead of 21...Nb4 but this off course loses to Qxd4 preventing mate on d1

Premium Chessgames Member
  Willem Wallekers: Indeed, very easy for sunday.
Jun-01-08  RandomVisitor: After the improvement <18.Rh3>:

click for larger view <24-ply>

1. (1.25): 18...Bd7 19.0-0-0 Raf8 20.Kb2 Be8 21.Rdh1 Rxf3 22.gxf3 h5 23.Rg3 Qh7 24.Rhg1 g6 25.Bg5

Premium Chessgames Member
  playground player: This was beyond me. Nevertheless, I did see two things. First, that White's decision to castle Queenside was fraught with danger; and, second, that if Black's light-square Bishop could be activated, it would be the key to attacking White's King--with all potential defenders bottled up on the Kingside and unable to help.

I found the strategy, but couldn't find the tactics. Good way to lose a chess game, or a war.

Jun-01-08  Oliveira: 20...Rf3!! 21.gf3 [21.Rf3 Nb4!! 22.Kd1 (22.cb4, Ba4 ) Qc2 23.Ke1 Nd3 24.Kf1 Qd1#] Nb4!! 22. Kd1 Qc2 23. Ke1 Qd3 Comparative facility of the puzzle is in evidence of White's debilities square 'c2' and diagonal 'd1-a4', beyond the solution lies in the follow-up moves somewhat short.
Jun-01-08  Oliveira: Is interesting to note which Mortensen could be thinking in 21.Kb2 with idea 22.Bh6, so if 22...gh6 23.Rg3 or 22...Qh6 23.Qg4 .
Premium Chessgames Member
  Once: As a puzzle, I would agree with many here that this looks easy for a sunday. The weakness of c2 cries out for a combination. If only we could get rid of knight and rook, then Ba4 would leave c2 undefendable.

So how can we get rid of rook and knight? Nxe5 doesn't quite work, so the only line worth analysing is Rxf3. For a sunday puzzle, there seem to be very few branches in the tree of analysis.

The two weaknesses here for white are the backwards pawn on c2 and the fact that none of his pieces can return quickly to aid his king.

Jun-01-08  pagliacci19: first sunday puzzle that i have ever solved completely. of course, i have to ignore the fact that this is due almost entirely to the fact that chessgames decided to lower the bar, but i am fine with that :)
Jun-01-08  PinnedPiece: <whiteshark: Got it! Once you have spotted the square c2 weakness and it's sole possible defender you find the program flow chart quite easily.>

Couldn't have said it better. Easiest Sunday puzzle ever.

Jun-01-08  turiya: Oops..I was solving for white to play..
I thought of Bxh6. Is this winning?
Premium Chessgames Member
  al wazir: <znprdx: Well now that I'm playing through the game 16.Rh2 seems weak ...simply Rh3 17.Qg6 Qh4>

I'm with you. 16. Rh2 wastes a tempo.

If the game continues 18. O-O-O Bd7 19. Rdh1 h6 (the same moves as those that were played), then white *can* play 20. Rg3, as I originally wanted to, winning!

I claim a point!

Jun-01-08  znprdx: <PinnedPiece: ...Easiest Sunday puzzle ever.> Only when you a) know it is a puzzle b)see the answer

OTB it is almost miraculous - because Black just just looks lost. I find it tiresome to read how so many claimed to have found it - I didn't realize there were so many masters on this site.

Jun-01-08  Lightboxes: As some people have said, this one is not so difficult as other Sundays. I usually miss the weekday puzzles but this one took me less than 5 minutes.

The only way black can create some good attacks is to check mate the lonely king. But White's knight is in the way. So the rook move is first. Then black's bishop teaming up with black's queen is perfect for ending the game. But black's knight is in the way, so you move somewhere forceful where white is not able to respond with a free move. Thus, ending with:

22. axb4, Ba4
23. Kb1, Qxc2+
24. Ka1, Qxc3+
25. Ka2, Bb3+
26. Ka3, Bc2+
27. Ka2, Qb3+
28. Ka1, c3
29. Bc1, Qb1#

Jun-01-08  Lightboxes: <znprdx: I didn't realize there were so many masters on this site.>

I actually admitted on my last post I miss weekday puzzles. I believe this puzzle to be so easy because even I got it!

Jun-01-08  dzechiel: Reading over the posts today I note that many contributors commented on the fact that this appeared to be "white to play" instead of "black to play".

I confess that when I started to solve today's position, I carefully wrote "Black to move (20...?)" in my Notepad window, then proceeded to look at the position and try to find the best move for white.

I shortly had settled on Rg3 and convinced myself that this would be a romp. It was at that point that I thought, "This is too easy, what's going on?" Then I looked again and saw that it was black on the move.

"OK, that's why this one is easy, let's gird our loins and look for a move for black!" Of course, I found the key move for black even quicker, as the weak point at c2 can be attacked with obvious moves.

Strange that white didn't sense what was coming and take precautions.

Jun-01-08  jadedpawn: Thought this was pretty simple after seeing the queen's discovered attack on c2 and blacks other pieces coordinating on that square but i didn't see further than

Rxf3 21. gxf3 Nb4 22. Kd1 Qxc2+ 23. Ke1 Qb1+ 24. Bc1 Qxc1+ 25. Ke2 Qxc3 26. Kf1 when black has 2 pieces and 2 pawns for the rook and a dangerous looking attack.

Jun-01-08  Marmot PFL: Way cool attacking idea which I found only by knowing it was a puzzle. c2 can be attacked by Q+B, but the knight is in the way so sac it (this is fantasy), but wait the white knight can defend c2 with Ne1, so get rid of that first with Rxf3. Even than to see that mate is forced is not so easy. Would I find this in a game? Maybe, with 2 weeks per move. (Was this a correspondence game?)
Jun-01-08  Marmot PFL: <jadedpawn> In your line 23...Nd3+ is mate in 2. However the line you give is farther than i would be able to see from the starting position.
Jun-01-08  Dnunez: I can't believe I got this one, perfectly. It's the first time I solve a sunday puzzle! whooopiii!!
Jun-01-08  thitho: i guess it was an easy one: i found it too... this is not normal :-)
Jun-01-08  messachess: I don't know if this deserves 'insane' designation, but it's not easy to see the 3-move combination with the attack on c2 with Bishop and Queen. I think a master might miss this over the board.
Premium Chessgames Member
  kevin86: Funny,I saw the move of Rxf3 almost instantly. I just didn't inderstand the rams of the move.
Jun-02-08  PinnedPiece: <znprdx: <PinnedPiece: ...Easiest Sunday puzzle ever.> Only when you a) know it is a puzzle b)see the answer OTB it is almost miraculous - because Black just just looks lost. I find it tiresome to read how so many claimed to have found it - I didn't realize there were so many masters on this site.> Too True! I've said as much myself many times. However!!! I Got IT! and I NEVER come close on Sundays.

It makes a huge difference to know that a position is a puzzle position and that a certain move, if found RIGHT NOW will win the day for the stated side to move. In a middle game position, its the difference between talented and trained players, and wannabes, to be able to spot such a combination.

Certainly I could only get this correct answer by knowing in advance that the right move is there to be made.

In plenty of my games, I THINK I see a winning move, try it, and find it sadly deficient....I WASN'T AT A PUZZLE POSITION!!!!

But, that's what makes puzzles fun, and different, <znprdx>. I don't know that the atmosphere of the puzzle room is improved by complaining that people found the solution!!!!

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