Test Position: Brilliant endgame shot

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Albert Silver
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Test Position: Brilliant endgame shot

Post by Albert Silver »

This position came up in my slow TC Rybka-Robbo match, and at first view it may not seem obvious how white (Robbo) penetrates. Yes, there is an exchange, but black's bishop seems to be able to cover all the right spots. Then comes the zinger ending all doubts. A great shot.

[D]8/5k1p/1p1pRp2/p2P4/P1P3Pp/1P4bP/6K1/8 w - - 0 49
"Tactics are the bricks and sticks that make up a game, but positional play is the architectural blueprint."
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Jouni
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Joined: Wed Mar 08, 2006 8:15 pm

Re: Test Position: Brilliant endgame shot

Post by Jouni »

I quess c5 is winning, because the king can enter black position. But I didn't wait until any engine solution - I was faster :)

Jouni
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Albert Silver
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Re: Test Position: Brilliant endgame shot

Post by Albert Silver »

Jouni wrote:I quess c5 is winning, because the king can enter black position. But I didn't wait until any engine solution - I was faster :)

Jouni
Sorry, that isn't it.
"Tactics are the bricks and sticks that make up a game, but positional play is the architectural blueprint."
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Jouni
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Re: Test Position: Brilliant endgame shot

Post by Jouni »

Really?

1. c5 bxc5 {2.70/14 1} 2. Kf3 {3.23/17 1} Bh2 {3.31/13 1} 3. Ke4 {3.31/14 1}
Be5 {3.55/13 1} 4. Kd3 {2.42/9 1} Kg6 {2.78/11 1} 5. Kc4 {3.67/11 1} h5 {
4.40/13 1} 6. gxh5+ {5.61/16 5} Kxh5 {5.41/9 1} 7. Kb5 {6.62/15 2} Bd4 {
5.73/15 2} 8. Rxd6 {6.58/16 4} Kg6 {6.46/12 1} 9. Kxa5 {7.23/14 1} Kf7 {
6.98/11 1} 10. Kb5 {6.90/9 1} f5 {7.51/14 2} *

Jouni
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Albert Silver
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Re: Test Position: Brilliant endgame shot

Post by Albert Silver »

Jouni wrote:Really?

1. c5 bxc5 {2.70/14 1} 2. Kf3 {3.23/17 1} Bh2 {3.31/13 1} 3. Ke4 {3.31/14 1}
Be5 {3.55/13 1} 4. Kd3 {2.42/9 1} Kg6 {2.78/11 1} 5. Kc4 {3.67/11 1} h5 {
4.40/13 1} 6. gxh5+ {5.61/16 5} Kxh5 {5.41/9 1} 7. Kb5 {6.62/15 2} Bd4 {
5.73/15 2} 8. Rxd6 {6.58/16 4} Kg6 {6.46/12 1} 9. Kxa5 {7.23/14 1} Kf7 {
6.98/11 1} 10. Kb5 {6.90/9 1} f5 {7.51/14 2} *

Jouni
Yes, really. Realize there may be more than one way to win this position. White does have an exchange after all, but there is a shot that decides the game much quicker.
"Tactics are the bricks and sticks that make up a game, but positional play is the architectural blueprint."
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metax
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Re: Test Position: Brilliant endgame shot

Post by metax »

Really nice is 1.b4! ab4 2.c5! bc5 (2...dc5 3.a5 +-) 3.Tb6 +-
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Brunetti
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Full name: Alex Brunetti

Re: Test Position: Brilliant endgame shot

Post by Brunetti »

Albert Silver wrote:there is a shot that decides the game much quicker.
1.b4 followed by Re3-b3, Kd3 and Rxc3 is quicker.

Alex
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zullil
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Full name: Louis Zulli

Re: Test Position: Brilliant endgame shot

Post by zullil »

Albert Silver wrote:This position came up in my slow TC Rybka-Robbo match, and at first view it may not seem obvious how white (Robbo) penetrates. Yes, there is an exchange, but black's bishop seems to be able to cover all the right spots. Then comes the zinger ending all doubts. A great shot.

[D]8/5k1p/1p1pRp2/p2P4/P1P3Pp/1P4bP/6K1/8 w - - 0 49
Stockfish-1.6.2 (8 threads) instantly chooses Kf3 (to be followed later by b4, it seems):

Code: Select all

Searching: 8/5k1p/1p1pRp2/p2P4/P1P3Pp/1P4bP/6K1/8 w - -
infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0
 2     +3.15   00:00       56 Kf3 Be5 
 3     +3.35   00:00      190 Kf3 Be5 Ke4 
 4     +3.43   00:00      374 Kf3 Be5 Ke4 h6 
 5     +3.19   00:00      611 Kf3 Be5 Ke4 h6 Kf5 
 6     +3.31   00:00     1257 Kf3 Be5 Ke4 Bg3 Kf5 Be5 
 7     +3.19   00:00     2138 Kf3 Be5 Ke4 Bg3 Ke3 Be5 Kd3 
 8  >  +3.56   00:00     4789 Kf3 Be5 Ke4 Bg3 Kf5 Be5 g5 fxg5 Rh6 
 9     +3.56   00:00     6671 Kf3 Be5 Ke4 Bg3 Ke3 Be5 Kd3 Bf4 Re4 
10     +3.56   00:00    12141 Kf3 Be5 Ke4 Bg3 Ke3 Be5 Kf3 Bg3 Re2 Be5 Ke4 Ke7 
11     +3.56   00:00    17625 Kf3 Be5 Ke4 Bg3 Ke3 Be5 Kf3 Bg3 Re2 Be5 Ke4 Ke7 
12     +3.52   00:00    33102 Kf3 Be5 Ke4 Bg3 Ke3 Be5 Kf3 h6 Ke4 Kg6 Re8 Kf7 
                              Rb8 
13  <  +3.31   00&#58;00   110997 Kf3 h6 Ke4 Bh2 Kf5 Be5 
14     +3.31   00&#58;00   210953 Kf3 Bh2 Re2 Be5 Ke3 h6 Ke4 Kg6 Rf2 h5 gxh5+ Kxh5 
                              Rg2 Bg3 Kf5 Be5 
15     +3.39   00&#58;00   327065 Kf3 h6 Ke4 Bh2 Ke3 Be5 Kd3 Bh2 Re2 Bg3 Kd2 Be5 
                              Rf2 Kg6 Rf1 h5 
16     +3.31   00&#58;00   417256 Kf3 h6 Ke4 Bh2 Ke3 Bg3 Kd4 Bf4 Re2 Bg3 Ke4 Kg6 
                              Ke3 f5 Kf3 fxg4+ Kxg4 
17  >  +3.56   00&#58;00   762401 Kf3 h6 Ke4 Be5 Kd3 Bh2 Re3 Be5 Rf3 Ke7 Ke4 Kf7 
                              Rf1 Ke7 Rf5 Kf7 Rh5 Kg6 Rxh4 
18     +3.52   00&#58;00    1320k Kf3 h6 Ke4 Bh2 Kd4 Be5+ Kd3 Bg3 Re3 Be5 Rf3 Kg6 
                              Rf5 Kg7 Ke3 Kg6 Rh5 Bg3 Rf5 Kf7 Rf1 Be5 Kd3 Kg7 
                              Ke4 Kg6 Rf5 Kf7 Rh5 Kg7 Rf5 Kg6 Rf2 h5 gxh5+ Kxh5 
                              Rg2 Bg3 Kf5 Be5 Ke6 
19     +3.52   00&#58;00    1812k Kf3 h6 Ke4 Bh2 Kd4 Be5+ Kd3 Bg3 Re3 Be5 Rf3 Kg6 
                              Rf5 Kg7 Ke3 Kh7 Rh5 Bg3 Ke4 Kg6 Rf5 Be5 Kd3 
20     +3.52   00&#58;01    2622k Kf3 h6 Ke4 Bh2 Kd4 Be5+ Kd3 Bg3 Re3 Be5 Rf3 Kg6 
                              Rf5 Kg7 Ke3 Kh7 Rh5 Bg3 Ke4 Kg7 Kf3 Kg6 Rf5 Be5 
                              Ke4 Kf7 Rh5 Kg7 Rxh4 Bg3 Rh5 
21  >  +3.72   00&#58;02   13127k Kf3 Be5 Ke4 Bg3 Kf5 Be5 g5 fxg5 Kxg5 Bg3 Kf5 Kf8 
                              Kg4 Kf7 Kg5 Kf8 Kf5 Kf7 Rf6+ Kg7 Kg5 Kg8 Kf5 Kg7 
22     +3.76   00&#58;02   15381k Kf3 Be5 Ke4 Bg3 Kf5 Be5 g5 fxg5 Kxg5 Bg3 Kf5 Kf8 
                              Kg4 Kg7 Re8 Kh6 Kf5 Kh5 Ke4 h6 Rb8 Bf2 
23  >  +4.48   00&#58;03   25343k Kf3 h6 Ke4 Bh2 Kf3 Kg6 Re8 f5 Re6+ Kg5 gxf5 Kxf5 
                              Rxh6 Bg3 Rh7 Kg5 Rb7 
24     +4.48   00&#58;05   42399k Kf3 Be5 Ke4 Bg3 Kf5 Be5 g5 fxg5 Kxg5 Bg3 Rf6+ Kg7 
                              Kf5 Be5 Re6 Kf7 Rh6 Kg7 Rxh4 Kg8 Ke6 Kg7 Rh5 Kg6 
                              Rxe5 dxe5 Kxe5 
25     +4.57   00&#58;08   71724k Kf3 Be5 Ke4 Bg3 Kf5 Be5 g5 fxg5 Kxg5 Bg3 Rf6+ Kg7 
                              Kf5 Be5 Re6 Kf7 Rh6 Kg7 Rxh4 Bb2 Ke6 Ba3 Rg4+ Kh6 
                              Kf5 Bb4 Re4 Kh5 Re7 h6 Re6 
26  >  +5.45   00&#58;13  114335k Kf3 Kg6 Re8 h5 gxh5+ Kxh5 Rb8 Kg6 Rxb6 Kf5 Ra6 
                              Ke5 Rxa5 
27     +7.31   01&#58;09  664514k Kf3 Be5 Ke4 Bg3 Kd3 Kg6 b4 Kf7 bxa5 bxa5 Ke4 Kg7 
                              Kf5 Kf7 Rxf6+ Kg8 Re6 Kf7 c5 dxc5 d6 h6 Rxh6 c4 
                              Rh7+ Kg8 d7 Bc7 Rxh4 c3 Rh6 Kf7 Rh7+ Kf8 
28     +8.28   03&#58;24    1910M Kf3 Be5 Ke4 Bg3 Kd3 Kg6 b4 Kf7 bxa5 bxa5 Ke4 Kg6 
                              c5 dxc5 d6 Kf7 Kd5 c4 d7 Bc7 Kc6 Bd8 Re8 c3 Rxd8 
                              c2 Rf8+ Kg7 Rg8+ Kf7 d8=Q c1=Q+ Kb5 Qb2+ Kxa5 
                              Qe5+ Ka6 Qe6+ Kb5 Qe5+ Kb6 Qb2+ Kc5 Qe5+ Kc4 Qe6+ 
                              Kb4 Qe7+ Qxe7+ Kxe7 
Nodes&#58; 1977212118
Nodes/second&#58; 9337924
Best move&#58; Kf3
Ponder move&#58; Be5
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Albert Silver
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Joined: Wed Mar 08, 2006 9:57 pm
Location: Rio de Janeiro, Brazil

Re: Test Position: Brilliant endgame shot

Post by Albert Silver »

metax wrote:Really nice is 1.b4! ab4 2.c5! bc5 (2...dc5 3.a5 +-) 3.Tb6 +-
Yes, b4! is the shot.

Brilliant, and quite tough for the engines on average. If it weren't such a slow TC, Robbo probably would never have found it in the game, but it did, and kudos for crowning its win with such a nice shot.
"Tactics are the bricks and sticks that make up a game, but positional play is the architectural blueprint."
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Oratios

Re: Test Position: Brilliant endgame shot

Post by Oratios »

Nice position !
Stockfish, Fruit and Deep Junior doing well !
[4 threads, x64]
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