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|Nov-23-14|| ||al wazir: I looked at 47...Ba4, but missed the point.|
|Nov-23-14|| ||morfishine: At least for me, one of those strange optical nuances where its difficult to see from the White side, but when I flipped the board around, I quickly found <47...Ba4>|
47...Ba4 48.bxa4 b3 49.Kf3 bxc2
|Nov-23-14|| ||devere: <chessgames.com: Honestly, we're not 100% sure if there aren't alternate methods, but if it's true that the variation with 50...Bd1+ is critical to the combination, then we think it qualifies as a Sunday stumper.>|
47...Ba4!! is essential to the win, but 50...Bd1+!! while very pretty and best, is not essential, and 48.Re2 isn't White's best try, so it is difficult to foresee the beautiful move 50...Bd1+.
White's best try seems to me to be 47...Ba4 48.h5 Bxb3 49.h6 Bxc2 50.Rg2 Rb3+ 51.Kd2 Bxe4 52.h7 Rd3+ 53.Ke2 Bxg2 54.Kxd3 Bf1+ 55.Ke3 b3 56.h8=Q b2 and Black is winning
click for larger view
I guess that's complex enough for a weekend puzzle.
|Nov-23-14|| ||plumbst: Insane. Material is even.
Endgame puzzle, it's been a while. Black's advanced g-pawn is the key here since White must keep watch over it with at least one of his pieces. This suggests
(If 48.Bd1 Rxd2; 48.bxa4 b3 49.Rg2 Rxc2 50.Rg1 b2 51.Rb1 g2 and a pawn promotes.)
With no way to defend the b3 pawn, White has to counter with his own passed pawn.
Black has to let White's pawn go if he wants to force his own pawns through.
(50.h7 Rc3+ 51.Ke2 g2 52.Kf2 Rh3 stops the pawn)
Other moves are no better; Black escapes after 53.Qxf6 b1=Q 54.Qxf7+ Kb6 or 53.Qa8 b1=Q 54.Qa7+ Qb7 55.Qa5 Qb6+.
|Nov-23-14|| ||plumbst: Hmm, I guess I should've mentioned the line played in the game since 50...Bd1+! is a nice find.|
Overall, a very nice, study-like puzzle. It reminds me of Endgame Challenge by John Nunn which is one of my favorite books.
|Nov-23-14|| ||morfishine: <devere> Nice variation|
|Nov-23-14|| ||M.Hassan: "Insane"
Black to move 47...?
Black is a pawn up that is a passed pawn on g file
A) 49.Bxb3 Rxd2
50.Kxd2 g2 ---> promotes
B) 49.Bd1 Rxd2
50.Kxd2 g2 ----> promotes
One of the pawns will be promoted.
Time to check
|Nov-23-14|| ||diagonalley: <morfishine> ...agreed... actually not quite 'insane' once the idea is spotted (though - needless to say - yours truly failed to do so!) ...excellent end game study|
|Nov-23-14|| ||Geronimo: ...the kind of endgame I wake up in a cold sweat shaking about.|
|Nov-23-14|| ||daveinsatiable: <devere> it seems to me that after:|
57. Qe8/Qxf6 b1=Q
white either has a perpetual or a check along the b file to capture the queen on b1.
|Nov-23-14|| ||patzer2: The difficulty in this Sunday puzzle is not so much in finding the initial move 47...Ba4!|
After all, it's the only way for Black to make any progress, or counter the threat of 48. h5.
The real difficulty in the position is finding the best follow-up moves after the strongest line of play 47...Ba4! 48. h5.
Fritz 12 gives a complicated winning line after 47...Ba4! 48. h5:
47...Ba4! 48. h5 Bxb3! 49. h6 Bxc4! 50. h7 b3! 51. h8=Q bxc2 52. Rxc2
Rxc2 53. Kf3 g2 54. Qg8 Ra2! 55. Qg7 Rd2 56. Qg8 d5! 57. Qxf7+ Kb6 58. Qxf6+ Kb5 59. Qg6 dxe4+ 60. Kxe4 Rd1 61. Qe8+ Ka5 62. Qa8+ Ba6 63. Qg8 g1=Q 64. Qxg1 Rxg1
In solving the puzzle, I followed the game up until 49...Rxe2 . Here I deviated with 49...g2 , which Fritz 12 indicates transposes after a few moves into the winning line after 49...Rxe2 (-8.57 @ 23 depth).
P.S.: White's decisive mistake in the game was 47. h4?? Instead, Fritz 12 indicates 47. hxg3 = gives White fully level chances (0.00 @ 29/47 depth).
|Nov-23-14|| ||vajeer: Another variation to consider may be:
Black can force win with 50...g2
51. Kf2 Bc2
52. h5 b3
53. h6 b2
54. Kxg2 b1(Q)
55. h7 Bxd4+
56. Bf3 Bxf3
57. Kxf3 Qh1+ etc.
|Nov-23-14|| ||agb2002: Black is one pawn ahead.
White threatens 48.h5, etc.
Black has two advanced pawns on b4 and g3. This suggests 47... Ba4 to remove or divert the defenders:
A) 48.bxa4 b3
A.1) 49.Bd1 Rxd2 50.Bf3 (else 50... g2 promotes) 50... g2 51.Bxg2 Rxg2 wins.
A.2) 49.h5 Rxc2 50.h6 g2 51.h7 g1=Q+ wins.
A.3) 49.Bxb3 Rxd2 as in A.1.
B) 48.h5 Bxb3
B.1) 49.h6 Bxc2 (49... Rxc2 50.Rxc2 (50.h7 g2 51.Rxg2 (51.h8=Q g1=Q+ with a mate attack) 51... Rc3+ followed by 52... Rh2 with decisive material advantage) 50... Bxc2 51.h7 + -)
B.1.a) 50.h7 Rb3+ 51.Ke2 (51.Rd3 Rxd3+ 52.Ke2 g2 53.h8=Q (53.Kf2 Rh2 - +) 53... g1=Q with a mate attack) 51... g2 52.Kf2 (52.h8=Q g1=Q 53.Qh6 Qg2+ 54.Ke1 Rb1+ 55.Rd1 Rxd1#) 52... Rh3 53.Rxc2 Rxh7 54.Kxg2 Kc6 with two extra pawns and a won ending.
B.1.b) 50.Kf3 Bxe4+ 51.Ke3 Rxd2 52.Kxd2 g2 wins.
B.1.c) 50.Ke2 g2 51.Kf2 Rb1 52.Kxg2 Bxe4+ 53.Kg3 Bxf5 with decisive material advantage.
B.2) 49.Bxb3 Rxb3+ 50.Ke2 (50.Rd3 Rxd3+ 51.Kxd3 g2 wins) 50... g2 followed by 51... Rh3 again with two extra pawns and a won ending.
B.3) 49.Kf3 Rxc2 50.Rxc2 (50.Rd1 Rc3+ wins because the rook can stop the h-pawn via a3-a8; 50.Rd3 g2 51.Rd1 Rc3+, etc.) 50... Bxc2
B.3.a) 51.h6 g2 52.h7 (52.Kxg2 Bxe4+ 53.Kf2 Bxf5 wins) 52... g1=Q 53.h8=Q Bd1#.
B.3.b) 51.Kxg3 Bxe4 52.Kg4 b3 53.h6 b2 54.h7 b1=Q 55.h8=Q Qg1+ 56.Kh3(4,5) Qh1+ wins the queen.
C) 48.Kf3 Bxb3 49.Kxg3 (other moves seem to transpose to previous lines) 49... Rxc2
C.1) 50.Rh2 Rxh2 51.Kxh2 Bd1 wins.
C.2) 50.Rxc2 Bxc2 51.h5 (else 51... Bd1 - +) 51... Bxe4 52.Kg4 b3 transposes to B.3.b.
|Nov-23-14|| ||IMRKs: haha, we all got this one|
|Nov-23-14|| ||chrisowen: Pins advance da spread spaced out a4 in,
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|Nov-23-14|| ||chrisowen: Am riff hand hash pawns hall-way save head and hand heapful of sugar field pawn am g3 engine hent up hint we b3 have clearance for angles son slide c6 arm in chair over hoop rung it eddy am wave in route c6 one hunt
hugs again honour and hope kings out ave free to dry head he define hoof dead diffuse have he found fed it hook in hope i think got rudder just about mind jangle over tickled it dog in dig as tendered it down in |
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fade free good first black won game fag try dip da fog dug affable miss-hap h4 and a4 in stadium filler key believe in d1 house.
|Nov-23-14|| ||JointheArmy: Way too easy for a Sunday puzzle.|
|Nov-23-14|| ||GoldenKnight: Got this one in a couple of minutes. The trick here was to notice that Black could not force much on the K-side alone, but that if he could produce a passer on the Q-side as well, he would score the point. The Bishop sacrifice then becomes pretty obvious when you couple the above with the fact that White's mobility is quite limited.|
|Nov-23-14|| ||TheBish: Timman vs Salov, 1991|
Black to play (47...?) "Insane"
Black has an extra pawn, but it's doubled, so material is essentially even. The pawns that really matter are the b-pawns, and especially Black's very advanced g-pawn! But White's h-pawn is a concern too.
47...Ba4! and now:
(a) 48. bxa4 b3 49. Bxb3 (49. Kd3 bxc2! 50. Rxc2 Rxc2 51. Kxc2 g2 and wins) 49...Rxd2! 50. Kxd2 g2 and the pawn queens.
(b) 48. Rd3 Rxc2 49. bxa4 Rc3! 50. h4 (50. Rxc3 bxc3 and one of Black's pawns will queen soon) 50...Rxd3+ 51. Kxd3 g2 52. h6 g1=Q 53. h7 Qh2 and Black wins.
(c) 48. h5 Bxb3 49. h6 (49. Bxb3 Rxd2 50. Kxd2 g2 51. h6 g1=Q 52. h7 Qh2+) 49...Rxc2 50. h7 (50. Rxc2 Bxc2 51. h7 b3 52. Kd2 g2 53. h8=Q g1=Q and Black is winning) 50...Rxd2 51. h8=Q (51. Kxd2 g2 52. h8=Q g1=Q wins) 51...Ra2 52. Qxf6 Bxc4 53. Qg7 g2 and Black will advance his b-pawn for the win.
(d) 48. Re2 Bxb3 49. Bd3 Rxe2+ 50. Kxe2 (50. Bxe2 g2! 51. Kf2 Bc2 52. h5 b3 53. h6 b2 54. h7 b1=Q 55. h8=Q g1=Q+ -- that's 3 promotions in a row! -- 56. Kf3 Bxe4#) 50...Bd1+! 51. Kf1 (51. Kxd1 g2 is easy) 51...b3 52. Kg2 Bc2 53. h5 Bxd3 54. h6 Bxe4+ and 55...Bxf5 for an easy win.
Very complicated! I suppose it earns the "insane" moniker.
|Mar-03-16|| ||cunctatorg: Now that is a masterpiece, a tactical-strategical one, proving once more what a great and deepest SuperGrandMaster Valery Salov was!!|
|Mar-03-16|| ||Howard: For those of you who are wondering what event this took place at, it was Amsterdam 1991. Salov and Short tied for first place ahead of eight others. Those other eight players included two individuals who would have been heavy favorites to win this event, but it didn't exactly work out that way.|
|May-08-17|| ||Ironmanth: Clever finish!|
|May-08-17|| ||RandomVisitor: After 24...d5!
click for larger view
Komodo-10.1-64bit: <4 minutes computer time>
<-0.92/35 25.Bd3 Rd6> 26.Ne3 Bc6 27.Nxd5+ Bxd5 28.exd5 Rcxd5 29.Be4 Rd2 30.Rb1 Rd1+ 31.Rxd1 Rxd1+ 32.Kf2 Rd2+ 33.Ke1 Rxb2 34.Rd3 Bg5 35.Kd1 Kf8 36.Rd7 Kg7 37.Rb7 h3 38.gxh3 Rd2+ 39.Ke1 Rxh2 40.Rxb5 Bd2+ 41.Kd1 Bxc3 42.Rb3 Bd4 43.Bd5 Kh6 44.Rg3 Rf2 45.Rf3 Rg2 46.Rd3 Rg1+ 47.Ke2 Kg5 48.Rd1 Rxd1 49.Kxd1 Bc5 50.a4
|May-08-17|| ||botvinnik64: Wow! What a nice old gem from...Salov! He was championship material for a while in the 90s, then just...where did he go? He wrote some really crazy analysis of his games for New In Chess. He hated Kasparov and the whole PCA crowd. Anyone know anything about this?|
|May-08-17|| ||RandomVisitor: After 47...Ba4 white is toast
click for larger view
Komodo-10.1-64bit: <3 1/2 hours computer time>
-15.27/36 48.bxa4 b3 49.Bxb3 Rxd2 50.Kxd2 g2 51.Bc2 g1Q 52.Bd3 Qf2+ 53.Kc3 Qxh4 54.Kc2 Qf2+ 55.Kc3 Qe1+ 56.Kc2 Qb4 57.Kd1 Qxa4+ 58.Ke2 Qa1 59.Kf3 Qa3 60.Ke2 Qc3 61.Ke3 Qb2 62.Kf3 Qd2 63.Bf1 Qf4+ 64.Kg2 Qxe4+ 65.Kh2 Qf4+ 66.Kg1 Qxf5 67.Be2 e4 68.c5 e3 69.Bb5 Qxc5 70.Be2 Qf5 71.Kh1 Qh3+ 72.Kg1 Qg3+ 73.Kh1
-18.91/36 48.h5 Bxb3 49.h6 Bxc2 50.Rg2 Rb3+ 51.Kd2 Bxe4 52.h7 Rd3+ 53.Kc2 Bxg2 54.h8Q Be4 55.Qxf6 g2 56.Qe7+ Kb6 57.Qd8+ Ka6 58.Qc8+ Bb7 59.Qd7 g1Q 60.Qb5+ Ka7 61.Qa5+ Kb8 62.Qd8+ Bc8 63.Kxd3 Qd1+ 64.Ke3 Qd4+ 65.Kf3 b3 66.c5 Qxc5 67.Qh4 Bb7+ 68.Kg4 Qb4+ 69.Kh5 Bf3+ 70.Kg5 Qxh4+ 71.Kxh4 b2 72.Kg5 b1Q 73.Kf6 Qxf5+ 74.Kg7 e4 75.Kf8 e3 76.Ke7 Kc7 77.Kf8
-250.00/36 48.c5 Bxb3 49.Rd1 Bxc2 50.Re1 Rb1 51.Re2 Rb3+ 52.Kd2 Bd3 53.Re3 Rb2+ 54.Kxd3 Rb3+ 55.Kd2 Rxe3 56.Kxe3 b3 57.cxd6+ Kxd6 58.Kd2 g2 59.Kc3 g1Q 60.Kxb3 Qg3+ 61.Kb2 Qxh4 62.Kc2 Qxe4+ 63.Kd2 Qxf5
-250.00/36 48.Rd1 Rxc2 49.h5 Bxb3 50.Rg1 Rh2 51.Kf3 Bc2 52.Kxg3 Rxh5 53.Ra1 b3 54.Ra7+ Kc6 55.Ra6+ Kc5 56.Ra5+ Kxc4 57.Ra4+ Kc3 58.Ra3 Bxe4 59.Kg4 Rxf5 60.Kh4 d5 61.Kg3 d4 62.Kg4 d3 63.Ra6 d2 64.Rd6 b2 65.Rc6+ Bxc6 66.Kxf5 b1Q+ 67.Kxf6 Qg6+ 68.Kxe5
-250.00/36 48.Rg2 Bxb3 49.h5 Rxc2 50.Rg1 Rh2 51.Kf3 Bc2 52.Kxg3 Rxh5 53.Ra1 b3 54.Ra7+ Kc6 55.Ra6+ Kc5 56.Ra5+ Kxc4 57.Ra4+ Kc3 58.Ra3 Bxe4 59.Kg4 Rxf5 60.Kh4 d5 61.Kg3 d4 62.Kg4 d3 63.Ra6 d2 64.Rd6 b2 65.Rc6+ Bxc6 66.Kxf5 b1Q+ 67.Kxf6 Qf5+ 68.Kxf5
-250.00/36 48.Re2 Bxb3 49.Bd3 Rxe2+ 50.Bxe2 g2 51.Kf2 Bc2 52.c5 b3 53.cxd6+ Kxd6 54.Bc4 b2 55.Ba2 Bxe4 56.h5 Kc5 57.h6 Bxf5 58.Kxg2 Kb4 59.Kf2 Ka3 60.Bd5 b1Q 61.Bf3 Qd3 62.Bb7 Be4 63.h7 Qf3+ 64.Ke1 Bxb7 65.h8Q Qh1+ 66.Ke2 Qxh8 67.Kd1 Qd8+ 68.Ke1 Qd2+ 69.Kxd2
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