< Earlier Kibitzing · PAGE 2 OF 2 ·
|Mar-01-16|| ||Penguincw: It's March! That last month felt longer than usual.
Should be a great month of chess with the Candidates tournament (say, when's the Championship).
Tuesday puzzle, and it's a Capablanca puzzle, which means the solution should be a simple one. And indeed, it is.
39...Qxb3, if white doesn't take the queen, they just lost a piece.
If 40.cxb3, then 40...Rxa3+, and the white queen is lost somehow or another (rather right now, or through a skewer).
Since black was already up the exchange and a pawn, this looks like one of those simplification puzzles.
|Mar-01-16|| ||agb2002: Black has a rook and a pawn for a bishop.
Black can reach a won ending with 38... Qxb3 39.cxb3 Rxa3+:
A) 40.Kb1 Ra1+ 41.Kc2 Rxc1+ 42.Kxc1 Ra1+ 43.Kc2 Ra2+ 44.Kxc3 Rxg2 - + [R+P].
B) 40.Qxa3 Rxa3+ 41.Kb1 Rxb3+ - + [R+3P vs B].
|Mar-01-16|| ||stacase: WHAM!
Easier than yesterday.
|Mar-01-16|| ||diagonalley: good puzzle, but requires a bit more calculation than is usual for a tuesday|
|Mar-01-16|| ||saturn2: After QxR black gets the queen back and (in forcing the reexchange Q for R) also the a pawn. This should be enough.|
|Mar-01-16|| ||Cybe: 38. Kb1 is stronger, then 38. Ka1 (Capa can not Q:b3), but Black is still much better.|
|Mar-01-16|| ||morfishine: <38...Qxb3> and Black gets a winning exchange-up endgame|
|Mar-01-16|| ||sfm: Cute little maneuvering by the queen in the last moves.
36.-,Qc4? would be answered by 37.Bc1 and matters are suddenly less clear.|
So first 36.-,Qc5!, forcing the white king to a2, and now 37.-,Qc4, pinning the rook. One threat is 38.-,RxP+ 29.QxR,RxQ+ 30.KxR,Qe2 and the bishop goes, and there is not really anything good to do about that.
|Mar-01-16|| ||Once: A delicious little combination with a little sting in the tail. Black doesn't just win an exchange, he wins a whole rook.|
After 38...Qxb3 39. cxb3 Rxa3+ we get a parting of the ways. White is going to lose his queen, but he can choose whether to lose it immediately or a little later. It doesn't make any difference in the long run because black has a nifty trick up his sleeve.
40. Qxa3 Rxa3+ 41. Kb1
click for larger view
And now the trick is 41...c2!
If white captures the pawn then Ra2+ wins the unprotected bishop on g2. 41. Kc1 Ra1+ 42. Kxc2 Ra2+ is the same thing. After 41. Kb2 black has the pleasant choice between Ra1 and Ra2+.
40. Kb1 Ra1+ 41. Kc2 Rxc1 42. Kxc1 Ra1+ 43. Kc2 Ra2+
click for larger view
And again black wins the Bg2.
|Mar-01-16|| ||Bubo bubo: Black, who is already up the exchange and a pawn, forces a decisive simplification and wins another pawn: 38...Qxb3 39.cxb3 Rxa3+ 40.Kb1 Ra1+.|
|Mar-01-16|| ||whiteshark: It took me a bit longer today, but finally I spotted the justifying <skewer motif> that <Once> visualized quite lively.|
|Mar-01-16|| ||CHESSTTCAMPS: Black is up by an exchange and a pawn, with white attempting to hold what's left of the flimsy king position with a last-stand defense of a3. White may be considering 39.Bf1, an attempt at active defense. Black can simplify with 38... Qxb3 39.cxb3 Rxa3+ and white must return the queen with additional losses:|
A.40.Kb1 Ra1+ 41.Kc2 Rxc1+ 42.Kxc1 Ra1+ 43.Kc2 Ra2+ wins white's remaining piece.
B.40.Qxa3 Rxa3+ 41.Kb1 Rxb3+ is also a slaughter (exchange + 3 pawns).
|Mar-01-16|| ||Eduardo Leon: <Once> Slightly more precise, in the 40.♔b1 ♖a1+ 41.♔c2 line, is <41...♖8a2+> 42.♔d1 ♖xc1+ 43.♔xc1 ♖xg2, keeping the c3 pawn.|
|Mar-01-16|| ||Oxspawn: The irrelevance of the white bishop; the threat of the black c pawn
39. cxb3 Rxa3+
41 Kb1 c2+
42 Kc2 Ra2+
43. king moves Rxg2
Is this it?
|Mar-01-16|| ||LoveThatJoker: I love WC Capablanca!
38...Qxb3! 39. cxb3 Rxa3+ 40. Qxa3 (40. Kb1 Ra1+ ) 40...Rxa3+ 41. Kb1 Rxb3+
|Mar-01-16|| ||dfcx: The a3 pawn is guarded by both queen and rook. Black can break through by taking out a defender.|
38...Qxb3 39.cxb3 Rxa3+
A. 40.Kb1 Ra1+ 41.Kc2 Rxc1+ 42.Kxc1 Ra1+ 43.Kc2 Ra2+ 44.Kxc3 Rxg2
B. 40.Qxa3 Rxa3+ 41.Kb1 c2+ 42.Kb2 (Kxc2 Ra2+ same result as A) Ra1 43.Kxc2 Ra2+
Black ends up with a rook up.
|Mar-01-16|| ||luftforlife: The X-ray attack so capably read by <Once> is similar to, and something of a mirror image of, the X-ray attack so capably read by <kkdogg> in the POTD from February 23rd resulting from H Tikkanen vs K Engstrom, 2014. There, in <kkdogg's> projected line, White's bishop was on b2, his king was on e2, and the Black rook giving check was on g2. Here, in <Once's> projected lines, White's bishop is on g2, his king is on c2, and the Black rook giving check is on a2. Two second-rank X-ray checks by Black's rook leading to capture of White's bishop. This thematic repetition is helpful -- as is the kibitzers' capable analysis. Keep 'em coming!|
Best to all, ~ lufty
|Mar-01-16|| ||YetAnotherAmateur: I should point out here that black already starts out up the exchange by quite a bit - R+2P versus B. All that's left to do is put the nail in the coffin by trading off what's left.|
So ... 38. ... Qxb3 39. cxb3 Rxa3+ 40. Qxa3 Rxa3+ 41. Kb1 and while black hasn't gained any material, he's certainly taken away any counterplay white might have had.
Then comes 41. ... c2+, and white is out of good options:
A) 42. Kxc2 Ra2+ wins the bishop
B) 42. Kc1 Ra1+ and then either Kxc2 transposes into line A, or 43. Kd2 c1=Q+
C) 42. Kb2 Ra2+ and either Kc1 transposes into line B, or black gets c1=Q
|Mar-01-16|| ||Longview: I wondered if the sequence is much different if Black's last move were different. IF he had left the rook pinked on b3 thus defending with the King b3x2 and a3x2 would he have delayed things longer or come out better? The move I thought of was B-f1 which results in rearrangement of the moves and black being left with a queen and winning the bishop to boot. Oh well so much for improvement on a master!|
Good reviews guys.
|Mar-01-16|| ||kevin86: Black will regain the queen and be a rook ahead!|
|Mar-01-16|| ||patzer2: Though I found the 38...Qxb3 39. cxb3 Rxa3+ easy for a Tuesday solution, my two older visiting Grandsons (ages 10 and 7) found it a little difficult.|
In giving them a hint, I put the position into Fritz 15 and flipped the board so they could view it from Black's perspective. Then I asked what captures is Black threatening for possible candidate moves.
The boys immediately eliminated 38...Qxf4?? as simply losing the Queen to 39. Qxf4. They also saw that 38...Rxa3 39. Rxa3 Rxah3 40. Qxa3 dropped a piece as White's two defenders are sufficient to defend the pawn on a3.
That left only 38...Qxb3 as a possibility. At first the older Grandson asked, "but doesn't that just drop the Queen for nothing?" I replied, "visualize the position after 38...Qxb3 39. cxb3 and see what follows." Then the younger Grandson said "I see it now. Black plays 39...Rxa3+ and after 40. Qxa3 Rxa3 wins the White Queen and is a Rook ahead."
I then asked him what happens if White plays 40. Kb1, to which the 7-year-old replied then we play 40...Ra1+ and win the Queen.
I then proceeded to show them that in this line after 40. Kb1 (diagram below)
click for larger view
we not only have a skewer that wins the Queen, but we also have a follow-up skewer than wins the Bishop after 40...Ra1+ 41. Kc2 Rxc1+ 42. Kxc1 Ra1+ 43. Kc2 Ra2+ 44. Kxc3 Rxg2 .
P.S.: For a White improvement the computer suggestion 9. c4 d4 10. Be2 = (-0.07 @ 24 depth) might be worthy of consideration. After 9. h3?! Bxf3 10. gxf3 Qc7 (-0.57 @ 24 depth, Stockfish 6) Capablanca has a slight advantage that he slowly but surely builds upon until he has a decisive result.
|Mar-01-16|| ||Once: <patzer2> Good story! Enjoyed that, and could just picture the scene.|
|Mar-01-16|| ||patzer2: <Once> Enjoyed the 41...c2! trick. I'll make it a point to show it to the boys this afternoon.|
Right now my Grandsons are traveling with their Mom and Dad to a neighboring town to attend their Great Grand Mother's 100th Birthday celebration. She's a great lady who has an active mind and still drives and lives in her own separate apartment adjacent to her son and daughter-in-law.
|Mar-01-16|| ||mikrohaus: I like the trend on CG to have the POD in a traditional way, meaning forced or semi-forced moves to get the solution.|
However, this puzzle is too easy, although making my requierments, and should be a Monday puzzle.
|Mar-01-16|| ||gabriel25: <Chrisowen> I think that some longer words would break the monotony of so many short words. By now you must recognize that the main appeal of your poetry is visual since you don't pay any attention to us who try to understand it.|
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