|Oct-10-14|| ||Bobby Spassky: First.|
|Oct-10-14|| ||Steve.Patzer: Does 22. Rg1 hold out just a little bit longer?|
|Oct-10-14|| ||The17thPawn: A bit but 22..., Rxf2 23. Bxf2, Qf3+ 24. Rg2,Qxg2# seems to finish things.|
|Oct-10-14|| ||Ray C: <The17thPawn> If 22 ...Rxf2, then 23. Rxf2 and the Black queen has no immediate way in.|
|Oct-10-14|| ||plumbst: Difficult. Material is even. Black's g4 Bishop is under attack.|
Black has a worse endgame pawn structure, so he must go for the attack with his better development.
19...Bxf3! Smashing the position open.
23.Nxf3 R8xf3. Black has too many threats such as Rh3, e4, or Re2 followed by Rff2.
|Oct-10-14|| ||plumbst: Ah, in the last line 21...Bxg2+ 22.Kg1 Bxe4+ 23.Kf1 Bc5 wins faster.|
|Oct-10-14|| ||The17thPawn: <Ray C> That would work if there was a rook on F1 but <Steve.Patzer> was asking about 22. Rg1 results.|
|Oct-10-14|| ||al wazir: The first three moves were easy. But what does black do after 22. Rg1 ? If 22...Rxg1+, then 23. Kxg1 Rxf3 or if 22...Rxf2, then 23. Rxg6 Rf1+ 24. Bg1 Qf3+ Rf2. Now I don't see anything better for black than grinding out a win by virtue of his two-♙ advantage.|
|Oct-10-14|| ||al wazir: I see <Steve.Patzer> got there ahead of me.|
|Oct-10-14|| ||agb2002: Black has the bishop pair for a bishop and a knight.|
White threatens 20.fxg4.
The white queen cannot take part in the defense of the king. The obvious move to start the assault is 19... Bxf3:
A) 20.gxf3 Qh3
A.1) 21.Rg1 Qxf3+ 22.Rg2 Qxg2#.
A.2) 21.Rf2 Rxf3
A.2.a) 22.Rxf3 Qg2#.
A.2.b) 22.Raf1 Qxf1+ 23.Rxf1 Rxf1+ 24.Bg1 Rf(g)xg1#.
A.2.c) 22.Ng5 Rxg5 23.Bxg5 Rxf2 24.Rg1 Qf3+ 25.Rg2 Qxg2#.
A.2.d) 22.Rg1 Rxf2 23.Rxg6 (24.B(N)xf2 Qf3+ 25.Rg2 Qxg2#) 23... Qf3+ and mate next.
A.3) 21.Ng3 Rxg3
A.3.a) 22.Rg1 Rgxf3 23.Bxa2 e4 24.Rg2 e3 looks winning. For example, 25.Rg1 Rf2 26.c3 Qxh2+ 27.Rxh2 Rxh2#.
A.3.a) 22.Rf2 Rfxf3 23.Raf1 Qxf1+ and mate in two.
A.4) 21.B(N)xg5 hxg5 wins a pawn without losing the attack (Rh6, g4, etc.).
B) 20.Rxf3 Rxf3 21.gxf3 Qh3
B.1) 22.Rg1 Qxf3+ 23.Rg2 Qxg2#.
B.2) 22.Ng3 Rxg3 23.Rg1 Rxf3 wins two pawns.
B.3) 22.Ng5 hxg5 as in A.4.
B.4) 22.Bg5 Qxf3+ 23.Kg1 Bc5+ and mate soon.
C) 20.Rg1 Rxg2 21.Rxg2 Bxg2+ 22.Kxg2 Qg4+ followed by 23... Qf3+ and 24... Qxe3, winning two pawns.
|Oct-10-14|| ||David2009: I suppose it is a question of spotting that after 19....Bxf3 20.Rxf3 Rxf3 21.gxf3 Qh3 reaching
click for larger view
White has no defence.
|Oct-10-14|| ||cocker: Giving the piece back with 21 Bg5 would have prolonged the game.|
|Oct-10-14|| ||greenfield67: Hmm. Missed the counterplay with Rf8+ and Qg8, so my planned line ended with Black taking back the bishop on e3 - and promptly getting checkmated. Over the board, I'd have readjusted and found something else, but I guess better chessplayers have to do that less often...|
|Oct-10-14|| ||gofer: White Ne4 and Be3 are doing a fantastic job of stopping black's
infiltration on the dark sqaures, but the light ones are weak!|
<19 ... Bxf3>
Black cannot re-capture with the pawn...
20 gxf3 Qh3
21 Rf2 Rxf3
22 Raf1 Qxf1+
23 Rxf1 Rxf1+
24 Bg1 Rxg1#
But black can re-capture with the rook!!!
<20 Rxf3 Rxf3>
<21 gxf3 Qh3>
<22 Bg5 ...>
click for larger view
White gives back the piece to try to blockade the g file. From here there are lots
of choices for white and black. White's best bet is to play Qf2 at some point and try for a perpetual check on e8 and h5.
If black has some balls he might try...
23 ... Rxg5!
23 Nxg5 hxg5
24 Rg1 ...
The only way for white to stop mate...
24 ... e4
25 f4 e3!
26 d4 Qf3+
27 Rg2 Qf1+
28 Rg1 Qxf4
29 Rg2 Qe4
click for larger view
<David2009: I suppose it is a question of spotting that
after 19....Bxf3 20.Rxf3 Rxf3 21.gxf3 Qh3 reaching... White has no defence.>
Errr, yes he does!!!
|Oct-10-14|| ||morfishine: 19...Bxf3 20.gxf3 (not 20.Rxf3 Rxf3 21.gxf3 Qh3)
20...Qh3 21.Rf2 Rxf3 22.Raf1 Qxf1+ 23.Rxf1 Rxf1+ 24.Bg1 Rgxg1#
At least for me, the hardest part was seeing the laser 22...Qxf1+
|Oct-10-14|| ||consul: @<al wazir>:
After 22. Rg1 .. Rxf2, if White plays Rxg6 is mated with Qxh2#, whereas after N/Bxf2 Black replies with Qf3+ (which leads to mate).
|Oct-10-14|| ||patzer2: Analysis verified (move by move) with Fritz 12:
<19. Be3?> The losing move. Necessary here is 19. Bg5! Rxg5 20. fxg4 Rxf1+ 21. Rxf1 Rxg4 22. g3 Qe7 23. Qc3 .
<19... Bxf3!! 20. gxf3> Black wins with 19...Bxf3!!, which solves today's Friday puzzle.
If 20. Rxf3, then 20...Rxf3 21. gxf3 Qh3 22. Bg5 Qxf3+ 23. Kg1 Rxg5+ 24. Nxg5 Bc5+ 25. d4 Bxd4+ 26. Qe3 Bxe3#.
<20... Qh3 21. Rf2>
If 21. Bg5, then 21...Rxf3 22. Rg1 Bc5 23. Rg2 Qf5 24. Ng3 (24. Nxc5 Rf1+ 25. Rxf1 Qxf1+ 26. Rg1 Qf3+ 27. Rg2 Rxg5 ) 24... Qxg5 25. Qc3 Bf2
26. Rf1 Qf4 27. Rfxf2 Rxf2 28. Qe1 Rxg2 29. Kxg2 h5 30. h4 Rg4 31. d4 g5 32. Qxe5+ Qxe5 33. dxe5 gxh4 34. e6 Kg8 .
<21... Rxf3 22. Raf1>
If 22. Ng3, then 22...Rgxg3 23. Rg1 Rxg1+ 24. Kxg1 e4 25. Rxf3 exf3 26. Kf2 Qg2+ 27. Ke1 Qe2#.
<22... Qxf1+! 0-1> White resigns in lieu of 23. Rxf1 Rxf1+ 24. Bg1 Rfxg1#.
|Oct-10-14|| ||patzer2: <Steve.Patzer: Does 22. Rg1 hold out just a little bit longer?> <Consul> is correct in observing 22. Rg1 loses quickly to 22...Rxf2 .|
Fritz 12 shows it's mate-in-four after 22. Rg1 Rxf2 23. Qg8+
(23. Nxf2 Qf3+ 24. Rg2 Qxg2#; 23. Bf4 Qf3+ 24. Rg2 Qxg2#; 23. Bxf2
23... Qf3+ 24. Rg2 Qxg2#)
23...Kxg8 24. Nxf2 Qf3+ 25. Rg2 Qxg2#.
|Oct-10-14|| ||kevin86: Mate will be forced by the sheer power of the rooks!|
|Oct-10-14|| ||M.Hassan: "Difficult"
Black to play 19...?
Black has a Bishop for a Knight.
21.Rf2(not g1) Rxf3
If Rook on f2 is taken by either Knight or Bishop, mate can come through by checking on f3
Black is now stronger, should win
19....Bxf3 was the first move that cought my eyes, but did not see the continuation
|Oct-10-14|| ||M.Hassan: Correction:
I now see that in my line:
Brings about complications that I had not thought of. My line may not work.
|Oct-10-14|| ||al wazir: <consul: After 22. Rg1 .. Rxf2, if White plays Rxg6 is mated with Qxh2#> Of course. |
|Oct-10-14|| ||Penguincw: Woah. I nearly solved a Friday puzzle in 15 seconds! I got 19...Bxf3 20.gxf3 Qh3, but had I spent more time, I might have been able to solve it. :o|
|Oct-10-14|| ||Longview: I need some better glasses. I get the first move but cannot find the follow on moves. I missed the two important things in the follow on moves: Q-h3 challenging the f3 pawn with 21.... Rxf3 but also controlling the g2 square for the g6 rook with a threat of 21 ....Rg2. The other aspect I overlooked in my mental calculations was the black rook's g-file control when the g2 pawn moved! This closed off escapes but also opened a path for checks. I never got to consideration of Q-f1 and the sandwiching of white's last rook on f2. It is paralyzed with only one move left and that lead to mate. I could not see how the second white rook was going to be taken out. I kept thinking it would come in to thwart Black's chances so anything that lead to a Rook movement to f1 caused me start my hunt over. |
This is another good reason to look at past games. Perfecto!
|Oct-10-14|| ||TheBish: H Nagel vs A Lenz, 1994|
Black to play (19...?) "Difficult", material is even.
19...Rxf3!! and now:
(a) 20. Rxf3 Bxf3 21. gxf3 Qh3 22. Ng3 (or 22. Rg1 Qxf3+) Rxg3 and Black is winning.
(b) 20. gxf3 Qh3! 21. Ng3 (or 21. fxg4 Rxf1+ 22. Rxf1 Qxf1+ 23. Bg1 Qf3#; 21. Nd2 Bxf3+ 22. Nxf3 Qg2#) Bxf3+ 22. Rxf3 Rxf3 23. Rg1 Rxe3 and Black wins.
Hmmm. I did look at the game possibility, but didn't analyze it all the way to the flashy queen sac at the end. I thought my way (rook sac instead of the bishop) was flashier, but my line didn't end in a queen sac, so no full credit I guess. On the other hand, a win is a win, which I believe I found, and that's all that really matters in the end -- unless you're playing for a brilliancy prize!