|Nov-15-14|| ||Cheapo by the Dozen: My first thought was that the solution starts with 21 Qe2/Qe3. That pins the e5 knight, and Black can't defend with ... f6 because of the d6 discovered check. 21 ... Nd6, however, both counterattacks and blockades the d pawn, bringing the ... f6 possibility back into play.|
The other thought is to reverse move order and go with 21 d6 first, but then there's the matter of White's hanging c4 bishop.
|Nov-15-14|| ||Stormbringer: I'm guessing in the final position the bishop is untouchable? - QxB, Re1, Q-anywhere except f5 it can be taken, on f5 it allows for a royal fork with the knight on e7.|
So I got the first move, and (I think) I have come to understand the last move... and that's about it.
|Nov-15-14|| ||MNW: <Stormbringer> Why not Qxe1 instead of retreating? Seems to me that black has really good compensation|
|Nov-15-14|| ||MNW: Never mind, I miscounted material. White just goes up a whole rook. Doh!|
|Nov-15-14|| ||al wazir: I went with 21. Qe2 too. Didn't see 21...Nd6.|
|Nov-15-14|| ||bcokugras: I guessed but not conciously !|
|Nov-15-14|| ||plumbst: Very Difficult. Material is even. White's Bishop is under attack.|
White's loose bishop prevents him from winning material with Rde1, but the e-file is still the Achilles Heel of Black's position.
(21...Qd8 22.Bxe5; 21...Qxd6 22.Qe2, 21...Nxc4 22.dxe7)
The only square; 22.Bd5 runs into a pin on the d-file, 22.Be2 blocks the e-file, and 22.Bb3 c4! opens up c5 for the Queen.
White has a winning advantage after 25...Rfe8 26.f4 Ng4 27.Qxe6 fxe6 28.Bxc4 Ne3 29.Bb5 Nxd1 Rxd1.
|Nov-15-14|| ||plumbst: Missed the 22...c4 line, half-credit I guess.|
|Nov-15-14|| ||gofer: I was looking at the humble pawn-push, which ticks all my boxes and
then thought I had better check the replies for black and saw Nxf6+!
which was an ugly moment. Luckily we have a simple reply Rxf6, without
that life would indeed be <Very Difficult>! So now I am simply deciding
between d6 and Bxe5. The point being that I want to avoid 21 ... Nxc4
unless I am really going to be winning something worth-while!|
<21 d6 ...>
21 ... Nxc4
22 dxe7 Nxd2
23 exf8=Q+ Kxf8
21 ... Qd1/Qd2
21 ... Qxd6
22 Bxe5 Qxe5
23 Rfe1 Qf5
24 Qd5 Bxc3 (Qxd5 Nxd5! )
25 Qxf5 gxf5
26 bxc3 g6
Now we come to the star of the piece!
21 ... Nxd6
At this point, I have given up. I really want to play
22 Nd5, but I dont think it works...
Ah! Okay, I have to play <22 Ba2 >, well that explains a lot.
I really like the chance of playing Nxe7+ forcing the king on the
open H file and then swinging a rook across to give mate, but it
was just wishful thinking, the stolid attack of the knights on
d6 and e5 was the way forward, not the flashy ending I was hoping for...
|Nov-15-14|| ||morfishine: Truly a very difficult position to analyze OTB without actually being Yusupov and knowing what he was thinking to arrive at this point. |
What gives White a pull is the lurking pin vs Knight on <e5>, combined with the fact Black can't very well shore up the Knight with 21...f6 since this opens the a2-g8 diagonal, and finally, the passed d-pawn. These three aspects coordinate wonderfully to give White a winning position.
I first looked at 21.Qe2 (which I think is winning positionally) but settled on 21.d6 which is immediately forcing and more in Yusupov's style
<21.d6> 21...Nxd6 (21...Nxc4?? 22.dxe7 Nxd2 23.exf8=Q+ Kxf8 24.Rxd2 and White is up a rook) 22.Ba2 c4 (necessary to block the diagonal; bad for Black is 22...Nf5? 23.Rde1 Rfe8 24.Bxe5 and White has won a piece)
23.Nd5 Bc5+ 24.Kh1 Qe6 25.Nc7 Qe7 26.Nxa8 Rxa8 27.Qd5 forking the Bishop and Knight::
click for larger view
I don't see a reasonable move or continuation that allows Black to either recover the material or somehow gain a positional edge
Of course, 25.Bxe5 is more to the point since 25...Qxe5 26.Re1 Qf5 27.Ne7+ forks the Black Queen
|Nov-15-14|| ||patzer2: <Cheapo by the Dozen: My first thought was that the solution starts with 21 Qe2/Qe3. That pins the e5 knight, and Black can't defend with ... f6 because of the d6 discovered check.>|
<al wazir: I went with 21. Qe2 too. Didn't see 21...Nd6.>
Also went for 21. Qe2 thinking it's an easy pin 'em and win 'em combination, but missed the neat defense 21. Qe2 Nd6!
So in addition to another deep, attacking Saturday puzzle combination, we also get a lesson on using a counter attack to defend against a pin.
|Nov-15-14|| ||Penguincw: Well that was the shortest Saturday puzzle I've ever seen; I only got 21.d6. Is it Monday yet?|
|Nov-15-14|| ||Cheapo by the Dozen: I don't see anything better than:
21 Qe2 Nd6
22 Ba2 Bxc3
23 bxc3 f6
24 gf gf
The dual threat of Bxf8 and f4 seems to win material.
|Nov-15-14|| ||Cheapo by the Dozen: Well, if my line really wins the exchange or better like I think it does, I'll claim some reasonable degree of success on this puzzle. :) But I certainly missed the best line.|
|Nov-15-14|| ||kevin86: A quick win for white...just a very faint whiff of Legal in the ending.|
|Nov-15-14|| ||patzer2: <Cheapo by the Dozen> In the line from your post (diagram below)|
click for larger view
Fritz has it dead even after 25...R(f)e8. If after 25...R(f)e8, White tries 26. f4?? Black replies 26...Nef7 and traps the Bishop.
|Nov-15-14|| ||Jimfromprovidence: <morf> <21.d6> <21...Nxd6 22.Ba2 c4 (necessary to block the diagonal; bad for Black is 22...Nf5? 23.Rde1 Rfe8 24.Bxe5 and White has won a piece)>|
Morf, black can play 23...Rad8 in this line.
click for larger view
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advise e7 deal g5 found out life to drift safe to decant carafe pour on scourn it was in would plies driven screw you do then dank and dusty d6
sprung forth da da dum ball etc engine drive in to 22.Bd5 Nec4 23.Qc1 Rfd8 24.Na2 Nb6 25.Nxb4 cb4 26.Bxd6 Rxd6 27.Bxf7+ wins right d6 rook a f6 swallow tail over and excahnge up ride a lion in jail as hive check out c4 ash in so 22...c4 soluable ride i prefer tile a nice pick to be 22...Nf5 23.Rde1 Rad8 24.Bd5 Nxf3+ at focus again focal point coffer tile ground flock around clod flow face over off occular eye fob in f3 at catch dock found off came sac in f3 ogle inch of again 25.Bxf3 Rxd2 26.Rxe7 Rxb2 material equal has two bishops and 3 pawns in for a piece should win
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win 23...Qxg5+ wins a piece i d2 rook up 1 pawn ahead win c4 too add rook bishop at hack 24.Kh1 Qe6 25.Bxe5 Rfe8 26.Bxd6 Bxd6 27.Bxc4 Qf5 in team
either bind again hands e6 take e5 or rook slide
at e8 piece ahead win c4 and d6 if i culture bus enough at ja ship to dock doth a macks lack sac c4 caddy in light got hind black on the ropes again we hint as a loon a g2 and alf inside e8 skim palm cone at b3 sure up ride a feed f5 in tinkle bells are ringing men band cow patch in e8 to be lovely inter d6 missed lade to rest d5 knight surveys all time chain slim man c4 pop fane i shape d6 to a bind leaf had goof etc c4.
|Nov-15-14|| ||eblunt: <chrisowen> I'm sorry, but I don't really understand the point of all that incoherent drivel.|
|Nov-15-14|| ||agb2002: White has the bishop pair for a bishop and a knight.|
Black threatens 21... Nxc4.
White can pin the knight on e5 with 21.Re1 but Black simply plays 21... Nxc4. In the case of 21.Qe2 or 21.Qe3 the answer 21... Nd6 seems to solve Black's problems (22.Bxe5 Nxc4; 22.Qxe5 Qxe5 23.Bxe5 Nxc4).
Another possibility is 21.Bxe5 Qxe5 22.d6, menacing 23.d7, but 22... Qd4+ 23.Qxd4 (else 23... Qxc4) 23... cxd4 24.d7 Nd6 and 25.Rxd4 is met with 25... Bc5.
The last line suggests 21.d6 Nxd6 (21... Nxc4 22.dxe7 Nxd2 23.exf8=Q+ Kxf8 24.Rxd2 + - [R vs P]) 22.Ba2 (22.Qxd6 Qxd6 23.Rxd6 Nxc4 White has lost a pawn and the bishop pair) with the threats Qxd6, Rfe1, Nd5, etc:
A) 22... Ndc4 23.Qe2 seems to win a piece (23... f6 24.Bxe5 followed by Qxc4+).
B) 22... Nec4 23.Bxd6 Nxd2 24.Bxd2 Nxf1 (24... Rfe8 25.Rxd2 + - [N vs P]) 25.Bxf8 + - [N vs P].
C) 22... Rad8 23.Nd5 Bxd2 (23... Qd7 24.Bxe5; 23... Qe6 24.Nxb4) 24.Nxe7+ Ke8 25.Rxd2 + - [2B vs N +P].
D) 22... Nf5 23.Re1 seems to win the knight on e5.
|Nov-15-14|| ||TheBish: Yusupov vs E Torre, 1987|
White to play (21.?) "Very Difficult"
First of all, I arrived at my solution by more or less a process of elimination. Not 21. Rfe1? Nxf3+, or 21. Rde1 Nxc4 22. Rxe7 Nxd2. Also the try 21. Qe2 (hoping for 21...f6?? 22. d6+) is well answered by 21...Nd6! (blockading the d-pawn) and neither 22. Bxe5 Nxc4 23. Qxc4 Qxe5 or 22. Qxe5 Qxe5 23. Bxe5 Nxc4 satisfies, and if 21. Qe2 Nd6 22. Ba2 Rae8 23. Rde1 f6! is now possible, and all of Black's problems are solved. So I thought, "What if we sacrifice a pawn so there is no blockade?"
21. d6! Nxd6
Clearly forced, otherwise Black loses the Ne5. If 21...Qxd6 simply 22. Qe2 wins the knight. If 21...Nxc4 22. dxe7 Nxd2 23. exf8=Q+ Kxf8 24. Rxd2 and White is up a rook.
Necessary, as 22. Qe2 Ndxc4 leaves Black ahead.
Alternatives: 22...Nf5 23. Rde1 Rad8 24. Qf2 and the knight will fall; 22...c4 23. Nd5! Bc5+ (23...Bxd2 24. Nxe7+ and 25. Rxd2 wins a piece) 24. Kh1 Qe6 25. Bxe5! wins a piece since 25...Qxe5 26. Rfe1 Qf5 27. Ne7+ wins the queen.
23. Qe2! Rfe8
As 23...Nc6 24. Qxe7 Nxe7 25. Bxd6 wins a piece.
24. Nd5 Qd7
Or 24...Qe6 25. Nf6+, winning the queen.
25. Bxe5 and White has won a piece, as 25...f6?? is not possible due to 26. Nxf6++.
|Nov-16-14|| ||patzer2: Here's a deep look at (21?) with Fritz 12:
<21. d6!!> White's strongest winning chance (+1.28 @ 21 depth).
The tempting 21. Qe2 is White's second best, but it's worth only a slight advantage (. Fritz's third choice is 21. Rde1 which also fizzles to only a slight advantage (0.59 @ 21 depth).
<21...Nxd6> Best and forced. Others lose decisively.
For example if 21...Qxd6 (other tries are worse), then 22. Qc1!
(not 22. Qxd6?? Nxd6 23. Ba2 Bxc3 24. bxc3 Ndc4! 25. Bxe5 Nxe5 26. f4! Ng4! 27. Rd7 with White's win dwindling to only a slight advantage)
22...Qb8 23.Nd5 Kh7 24. bg3! Ba5 25. Qe3 Nd6 26. Qxe5! Nf5 (26...Nxc4 27. Qe4 Qd8 28. Ne7 ) 27. Qxb8 Raxb8 28. Bxb8 (+6.46 @ 21 depth)
<22. Ba2> Until the search depth reaches 20, Fritz initially prefers 22. Bd5!? (+1.36 @ 21 depth). However, at 21 depth, 22. Ba2! (+1.45 @ 20 depth) is preferred.
<22...c4?> This is the losing move.
Black can complicate and leave the outcome in doubt with 22...Nd5 23. Rde1! Rad8 24. Bd5! Nxf3+ 25. Bxf3 Rxd2 26. Rxe7 Rxb2 27. Nd1! Rxh2! 28. Rxb7 (+1.29 @ 29 depth).
<23. Nd5!> (+3.50 @ 20/41 depth) Black's previous move overlooks this surprise Knight Fork, which exposes both Queens to attack but wins on the spot.
<23...Bc5+> Black's resistance is futile, but he still plays on for a few moves.
If 23...Bxd2, then 24. Nxe7+ Kh7 25. Rxd2 (+7.79 @ 2/45 depth) leaves White a piece up for an easy win.
<24. Kh1 Qe6 25. Bxe5!> (+4.36 @ 20 depth)
Black resigns as 25...Qxe5 26. Rfe1 wins with the threat of a royal fork after 26...Qf5 27. Ne7+ .
P.S.: Since best play doesn't result in a clear win for 21. d6! , perhaps 21. Qe2 or 21. Rde1 can be considered for at least partial credit toward yesterday's Saturday (21. ?) puzzle.