< Earlier Kibitzing · PAGE 2 OF 2 ·
|Jul-12-16|| ||stacase: 20.Bxd5+ was straight forward, Black's response was not, so I stewed for a while looking to see if Black could pull a fast one if he refused the Bishop. It looked pretty bleak.|
|Jul-12-16|| ||Oxspawn: <lost in space> <"trivial"!!??>. Speak for yourself, please! For some of us getting the Tueday puzzle is a cause for celebration and a cup of coffee. I am drinking mine now. Cheers.|
|Jul-12-16|| ||cocker: Easy if Black takes the bishop, not so obvious if the king runs away.|
|Jul-12-16|| ||Lambda: I don't think this is a position where you calculate all the lines other than the recapture. I think you just reason "since black can't recapture, this clearly makes progress in the attack, let's allow black to pick a square to put his king and then calculate only that line once he does".|
|Jul-12-16|| ||morfishine: <20.Bxd5+> and White wins: 20...exd5 21.Qxd5+ Kb6 22.Nc4+ and mate next move|
Sure, Black can deny recapture and run with his king with 20...Kb6 or 20...Kb5 or 20...Kc5 or 20...Kd6, but well, its time to go to work
|Jul-12-16|| ||saturn2: White can sacrifice rook, knight or bishop on d5. Me too I choose the bishop. If black retakes the end is obvious. Otherwise the black king will be out in the fresh air I dont see any need to calculate all details to justify the bishopsacrifice.|
|Jul-12-16|| ||steinitzfan: Declining the bishop is essential. Off hand moving to b6 looks best. If so, 21Qf2 looks interesting. I think the threat to win the queen with Nf5 or g4 gains an important tempo to transfer the queen to the king's sector.|
|Jul-12-16|| ||saturn2: Also 20 Rd3 seems playable.|
|Jul-12-16|| ||zb2cr: 20. Bxd5+ starts matters. 20. ... exd5; 21. Qxd5+, Kb6; 22. Nc4+, Ka6; 23. Qa5# is the main line. |
Moving the King onto the d-file is simply fatuous; White has his choice of discovered checks.
20. ... Kc5 has been ably covered above by <Penguincw> and 20. ... Kb5 by <Fish55> and <dfcx>.
|Jul-12-16|| ||Patriot: <Lambda> That line of logic works well in short time controls. In longer controls you want to be sure that black cannot wriggle out somehow and there isn't a better way. But I do like the way you think!|
|Jul-12-16|| ||Patriot: <saturn2> I also wondered about 20.Rd3. I'm always concerned about these quiet moves though because black could have quite a few replies. Consider Na6, Nd7, Bd7.|
|Jul-12-16|| ||YetAnotherAmateur: This is one of those cases where I'm not entirely convinced CG bothered to work out the declining lines ( 20. ... Kd6, 20. ... Kc5, 20. ... Kb5), which are a lot more interesting than the game line. If they had, they might have bumped this up from "Easy" to "Medium".|
We've had more than a few puzzles where that happens: the game has a dramatic sacrifice near the end, but the hapless victim doesn't really have to take the sac and can just accept the loss of a pawn somewhere.
|Jul-12-16|| ||Jack Kerouac: In the current vernacular, the King was a Pokeman 'hit'.|
|Jul-12-16|| ||The Kings Domain: Nice puzzle. Had black known how the game would turn out, he would have accepted white's sacrifice in the 12th move and settled for the draw.|
|Jul-12-16|| ||kevin86: Black looked lost from the start. It only needed a few fine touches to end hi misery.|
|Jul-12-16|| ||beenthere240: The comment "And if Kb6? Well, it's just way too long to type out," reminded me of Fermat's annotation to his last conjecture/theorem. I suspect that solution begins with 21. Nc4+ (if only because the W N needs to move before the B Q takes it with check.)|
|Jul-12-16|| ||PawnSac: < YouRang: FWIW, I didn't think it was necessary to calculate all the variations if black plays something other than 20...exd5.
For example, 20...Kb5
Material is even, but the black king is running around naked and surrounded by laughing enemy forces.
Simply 21.Rd3 (guarding Nf3 and ready to attack the king), and it's resignable. >
When I look at this position I first considered Qf1+! as it seems the Q can get in there faster than the rook.
click for larger view
The possible flight squares are a4, a5, b4, b6, c5.
It seemed that the best chance of flight would be ..c5 since the other direction
leaves the white king hopelessly trapped.
21.Qf1+ Kb4 (or ..Ka4) 22.Qc4+ Ka5 23.Qc5+ b5 24.Nc4+ Ka6 25.Qa3#
21.Qf1+ Kc5 22.Qf8+ Kb5 23. c4+ Ka6 24.Qa3+ Kb6 25.Qb4+ Ka6 26.Qb5#
21.Qf1+ Ka5 22.Nc4+ Ka4 23. b3+ Kb4 24.Qe1+ Qd2 25.Qxd2+ Kc5 26.Qa5+ b5 27.b4#
After 21. Qf1+ Kc5 i first considered 22. Qc4+ and saw that
if ..Kd6 23. Bxe6+ and both ..Ke7 24. Nf5+ or ..Ke5 24.Ng4+ wins the Q.
But mate is what i wanted. Then it was clear that Qf8+ keeps the K
from running to the center. So here's the line...
21.Qf1+ Kb6 22.Nc4+ Kc5 23.Qf8+ Kb5 24.Na3+ Ka4 25.Bb3+ Ka5 26.Qc5+ Ka6 27.Qb5#
Your suggestion Rd3 looks like it has to win, but was not as clear to me, so i just plugged it into Stockfish and out popped...
21. Rd3 Qxe3+ 22. Rxe3 Na6 23. Bf3 Ka5 24. Ra3+ Kb6 25. Rb3+ Nb4 26. Rxb4+ Ka5 27. Qe7 b6 28. Ra4+ Kxa4 29. Bc6+ Ka5 30. Qa3#
|Jul-12-16|| ||Olsonist: Easy if Black takes the bishop. Looks obvious but not quite obvious if the king declines. So I wonder why declining wasn't played OTB. If you're gonna take the bishop why not just resign and save us the trouble?|
|Jul-12-16|| ||agb2002: White is one pawn down.
Black threatens 20... Qxe3+.
White can resume the attack with 20.Bxd5+:
A) 20... exd5 21.Qxd5+ Kb6 22.Nc4+ Ka6 23.Qa5#.
B) 20... Kb6 21.Nc4+ (21.Qf2 Qf6) looks very good for White. For example, 21... Ka6 22.Qf1 exd5 23.Nd6+ and mate next.
C) 20... Kb5 21.Qf1+ seems to win. For exanple, 21... Kb6 22.Nc4+ Kc5 23.Qf2+ Kb5 24.Na3+ Ka5 25.Qe1+ and mate in three.
D) 20... Kc5 21.Qe7+ Kb5 (21... Kb6 22.Qb4+ Ka6 23.Bc4+ b5 24.Qxb5#) 22.c4+ and mate in two.
Another option is 20.Nxd5:
A) 20... exd5 21.Qxd5+ Kb6 22.Qb3+
A.1) 22... Ka6 23.Bd3+ and mate next.
A.2) 22... Ka5 23.Rd5+ and mate next.
A.3) 22... Kc5 23.Rd5+ Kc6 24.Qb5#.
B) 20... Na6 21.Nxc7+ Kc5 (21... Kb6 22.Nxa8+ wins) 22.Qf2+ Kb4 (22... Kc4 23.Qd4#) 23.Nxa6+ wins (23... bxa6 24.Bxa8).
C) 20... Nd7 21.Nf6+
C.1) 21... Kb6 22.Qxe6+ wins a pawn at least (22... c6 23.Qb3+).
C.2) 21... Kb5 22.Bd3+ followed by 23.Nxd7 wins a piece.
C.3) 21... Kc5 22.Nxd7+ Bxd7 23.Qf2+ followed by 24.Qe1+ or 24.Qe2+ and 25.Rxd7 wins a piece.
I don't know. I'd probably play 20.Bxd5+.
|Jul-12-16|| ||Patriot: <agb2002> What about 20.Rd3? There are a lot of options in that position.|
|Jul-12-16|| ||Cheapo by the Dozen: <drollere>,
Hmm. I forgot that the g5 pawn is defended. So your move order works.
(By the way, you made a typo -- h6/g6).
|Jul-12-16|| ||thegoodanarchist: My first thought was to play the line in the actual game, when Black's only legal 22nd move leads to mate next|
Then I thought there might be multiple ways to win for White. Heck, I am not like Nakamura - if I find ONE forced mate I play it and don't worry if there was a "more beautiful" one available.
|Jul-12-16|| ||gawain: Everything falls into place nicely after 20 Bxd5+ exd5 21 Qxd5+ This being a Tuesday, I naturally assumed that if Black declined the bishop he would be soon mated. However I was too lazy to confirm this.|
|Jul-12-16|| ||thegoodanarchist: <However I was too lazy to confirm this.>|
Wow, my respect for you has grown! I mean that sincerely. Really!
|Jul-13-16|| ||agb2002: <Patriot: <agb2002> What about 20.Rd3? There are a lot of options in that position.>|
I'm afraid I didn't even considered 20.Rd3 although it looks interesting.
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