Nice tactical shot

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Vinvin
Posts: 5300
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Nice tactical shot

Post by Vinvin »

White play and win :
Rxh7!!

[d]2r1r1k1/1bq1bppp/p2p1P2/1p4P1/3pP3/P1N4R/1PP4P/1K2Q1R1 w - - 0 23

from this game :

[Event "60m + 15s, rated"]
[Site "?"]
[Date "2008.12.16"]
[Round "?"]
[White "Great Ozzie, Rybka 3 960 32-bit"]
[Black "Junior Test, Thinker_53Bi"]
[Result "*"]
[WhiteElo "2465"]
[BlackElo "2489"]
[PlyCount "55"]
[EventDate "2008.12.16"]
[EventType "rapid"]

1. e4 {B/0 0} c5 {B/0 0} 2. Nf3 {B/0 0} d6 {B/0 0} 3. d4 {B/0 0} cxd4 {B/0 0}
4. Nxd4 {B/0 0} Nf6 {B/0 0} 5. Nc3 {B/0 0} a6 {B/0 0} 6. Be3 {B/0 0} e6 {B/0 0}
7. f3 {B/0 0} b5 {B/0 0} 8. a3 {B/0 0} Bb7 {B/0 0} 9. Qd2 {B/0 0} Nbd7 {B/0 0}
10. g4 {B/0 0} Nb6 {B/0 0} 11. O-O-O {B/0 0} Rc8 {B/0 0} 12. Kb1 {B/0 0} Nfd7 {
B/0 0} 13. Rg1 {B/0 0} Be7 {B/0 0} 14. g5 {B/0 0} Ne5 {B/0 0} 15. f4 {B/0 0}
Nec4 {0.01/1 95} 16. Qe1 {B/0 0} Qc7 {0.01/1 144} 17. Bxc4 {B/0 0} Nxc4 {
0.01/1 104} 18. Rd3 {B/0 0} O-O {0.01/1 118} 19. f5 {0.00/12 142} e5 {0.01/1 96
} 20. f6 {0.39/13 17} Nxe3 {0.01/1 208} 21. Rxe3 {0.96/14 3} exd4 {0.01/1 110}
22. Rh3 {0.95/15 55} Rfe8 {(h6) 0.01/1 120} 23. Rxh7 {1.59/14 207} Kxh7 {
0.01/1 96} 24. Qh4+ {1.73/15 59} Kg6 {(Kg8) 0.01/1 221} 25. fxg7 {1.73/14 0}
Kxg7 {(Bxe4) 0.01/1 106} 26. Qh6+ {1.92/16 738} Kg8 {0.01/1 0} 27. g6 {
1.92/17 160} Bg5 {0.01/1 63} 28. gxf7+ {1.92/17 154} *
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lmader
Posts: 154
Joined: Fri Mar 10, 2006 1:20 am
Location: Sonora, Mexico

Re: Nice tactical shot

Post by lmader »

Yeah, that is a remarkable find.
"The foundation of morality is to have done, once for all, with lying; to give up pretending to believe that for which there is no evidence, and repeating unintelligible propositions about things beyond the possibilities of knowledge." - T. H. Huxley
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lmader
Posts: 154
Joined: Fri Mar 10, 2006 1:20 am
Location: Sonora, Mexico

Re: Nice tactical shot

Post by lmader »

Weird: Deep Fritz 11 doesn't find this move until depth 15. Deep Fritz 10 finds it in seconds.
"The foundation of morality is to have done, once for all, with lying; to give up pretending to believe that for which there is no evidence, and repeating unintelligible propositions about things beyond the possibilities of knowledge." - T. H. Huxley
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lmader
Posts: 154
Joined: Fri Mar 10, 2006 1:20 am
Location: Sonora, Mexico

Re: Nice tactical shot

Post by lmader »

Crikey - I mean Deep Fritz 11 doesn't find the move until depth 25.
"The foundation of morality is to have done, once for all, with lying; to give up pretending to believe that for which there is no evidence, and repeating unintelligible propositions about things beyond the possibilities of knowledge." - T. H. Huxley
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User avatar
michiguel
Posts: 6401
Joined: Thu Mar 09, 2006 8:30 pm
Location: Chicago, Illinois, USA

Re: Nice tactical shot

Post by michiguel »

Vinvin wrote:White play and win :
Rxh7!!

[d]2r1r1k1/1bq1bppp/p2p1P2/1p4P1/3pP3/P1N4R/1PP4P/1K2Q1R1 w - - 0 23

from this game :

[Event "60m + 15s, rated"]
[Site "?"]
[Date "2008.12.16"]
[Round "?"]
[White "Great Ozzie, Rybka 3 960 32-bit"]
[Black "Junior Test, Thinker_53Bi"]
[Result "*"]
[WhiteElo "2465"]
[BlackElo "2489"]
[PlyCount "55"]
[EventDate "2008.12.16"]
[EventType "rapid"]

1. e4 {B/0 0} c5 {B/0 0} 2. Nf3 {B/0 0} d6 {B/0 0} 3. d4 {B/0 0} cxd4 {B/0 0}
4. Nxd4 {B/0 0} Nf6 {B/0 0} 5. Nc3 {B/0 0} a6 {B/0 0} 6. Be3 {B/0 0} e6 {B/0 0}
7. f3 {B/0 0} b5 {B/0 0} 8. a3 {B/0 0} Bb7 {B/0 0} 9. Qd2 {B/0 0} Nbd7 {B/0 0}
10. g4 {B/0 0} Nb6 {B/0 0} 11. O-O-O {B/0 0} Rc8 {B/0 0} 12. Kb1 {B/0 0} Nfd7 {
B/0 0} 13. Rg1 {B/0 0} Be7 {B/0 0} 14. g5 {B/0 0} Ne5 {B/0 0} 15. f4 {B/0 0}
Nec4 {0.01/1 95} 16. Qe1 {B/0 0} Qc7 {0.01/1 144} 17. Bxc4 {B/0 0} Nxc4 {
0.01/1 104} 18. Rd3 {B/0 0} O-O {0.01/1 118} 19. f5 {0.00/12 142} e5 {0.01/1 96
} 20. f6 {0.39/13 17} Nxe3 {0.01/1 208} 21. Rxe3 {0.96/14 3} exd4 {0.01/1 110}
22. Rh3 {0.95/15 55} Rfe8 {(h6) 0.01/1 120} 23. Rxh7 {1.59/14 207} Kxh7 {
0.01/1 96} 24. Qh4+ {1.73/15 59} Kg6 {(Kg8) 0.01/1 221} 25. fxg7 {1.73/14 0}
Kxg7 {(Bxe4) 0.01/1 106} 26. Qh6+ {1.92/16 738} Kg8 {0.01/1 0} 27. g6 {
1.92/17 160} Bg5 {0.01/1 63} 28. gxf7+ {1.92/17 154} *
I cannot see more than a perpetual after 24... Kg8. What would be the follow up after that?

Miguel
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Vinvin
Posts: 5300
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Nice tactical shot

Post by Vinvin »

michiguel wrote:
Vinvin wrote:White play and win :
Rxh7!!

2r1r1k1/1bq1bppp/p2p1P2/1p4P1/3pP3/P1N4R/1PP4P/1K2Q1R1 w - - 0 23

from this game :

[Event "60m + 15s, rated"]
[Site "?"]
[Date "2008.12.16"]
[Round "?"]
[White "Great Ozzie, Rybka 3 960 32-bit"]
[Black "Junior Test, Thinker_53Bi"]
[Result "*"]
[WhiteElo "2465"]
[BlackElo "2489"]
[PlyCount "55"]
[EventDate "2008.12.16"]
[EventType "rapid"]

1. e4 {B/0 0} c5 {B/0 0} 2. Nf3 {B/0 0} d6 {B/0 0} 3. d4 {B/0 0} cxd4 {B/0 0}
4. Nxd4 {B/0 0} Nf6 {B/0 0} 5. Nc3 {B/0 0} a6 {B/0 0} 6. Be3 {B/0 0} e6 {B/0 0}
7. f3 {B/0 0} b5 {B/0 0} 8. a3 {B/0 0} Bb7 {B/0 0} 9. Qd2 {B/0 0} Nbd7 {B/0 0}
10. g4 {B/0 0} Nb6 {B/0 0} 11. O-O-O {B/0 0} Rc8 {B/0 0} 12. Kb1 {B/0 0} Nfd7 {
B/0 0} 13. Rg1 {B/0 0} Be7 {B/0 0} 14. g5 {B/0 0} Ne5 {B/0 0} 15. f4 {B/0 0}
Nec4 {0.01/1 95} 16. Qe1 {B/0 0} Qc7 {0.01/1 144} 17. Bxc4 {B/0 0} Nxc4 {
0.01/1 104} 18. Rd3 {B/0 0} O-O {0.01/1 118} 19. f5 {0.00/12 142} e5 {0.01/1 96
} 20. f6 {0.39/13 17} Nxe3 {0.01/1 208} 21. Rxe3 {0.96/14 3} exd4 {0.01/1 110}
22. Rh3 {0.95/15 55} Rfe8 {(h6) 0.01/1 120} 23. Rxh7 {1.59/14 207} Kxh7 {
0.01/1 96} 24. Qh4+ {1.73/15 59} Kg6 {(Kg8) 0.01/1 221} 25. fxg7 {1.73/14 0}
Kxg7 {(Bxe4) 0.01/1 106} 26. Qh6+ {1.92/16 738} Kg8 {0.01/1 0} 27. g6 {
1.92/17 160} Bg5 {0.01/1 63} 28. gxf7+ {1.92/17 154} *
I cannot see more than a perpetual after 24... Kg8. What would be the follow up after that?

Miguel

24. Qh4+ Kg8 25. fxg7 Kxg7 26. Qh6+ Kg8 27. g6 Bg5 28. gxf7+ Kxf7 29. Rxg5 Ke7 30. Rg7+ Kd8 31. Rxc7 +-
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User avatar
michiguel
Posts: 6401
Joined: Thu Mar 09, 2006 8:30 pm
Location: Chicago, Illinois, USA

Re: Nice tactical shot

Post by michiguel »

Vinvin wrote:
michiguel wrote:
Vinvin wrote:White play and win :
Rxh7!!

2r1r1k1/1bq1bppp/p2p1P2/1p4P1/3pP3/P1N4R/1PP4P/1K2Q1R1 w - - 0 23

from this game :

[Event "60m + 15s, rated"]
[Site "?"]
[Date "2008.12.16"]
[Round "?"]
[White "Great Ozzie, Rybka 3 960 32-bit"]
[Black "Junior Test, Thinker_53Bi"]
[Result "*"]
[WhiteElo "2465"]
[BlackElo "2489"]
[PlyCount "55"]
[EventDate "2008.12.16"]
[EventType "rapid"]

1. e4 {B/0 0} c5 {B/0 0} 2. Nf3 {B/0 0} d6 {B/0 0} 3. d4 {B/0 0} cxd4 {B/0 0}
4. Nxd4 {B/0 0} Nf6 {B/0 0} 5. Nc3 {B/0 0} a6 {B/0 0} 6. Be3 {B/0 0} e6 {B/0 0}
7. f3 {B/0 0} b5 {B/0 0} 8. a3 {B/0 0} Bb7 {B/0 0} 9. Qd2 {B/0 0} Nbd7 {B/0 0}
10. g4 {B/0 0} Nb6 {B/0 0} 11. O-O-O {B/0 0} Rc8 {B/0 0} 12. Kb1 {B/0 0} Nfd7 {
B/0 0} 13. Rg1 {B/0 0} Be7 {B/0 0} 14. g5 {B/0 0} Ne5 {B/0 0} 15. f4 {B/0 0}
Nec4 {0.01/1 95} 16. Qe1 {B/0 0} Qc7 {0.01/1 144} 17. Bxc4 {B/0 0} Nxc4 {
0.01/1 104} 18. Rd3 {B/0 0} O-O {0.01/1 118} 19. f5 {0.00/12 142} e5 {0.01/1 96
} 20. f6 {0.39/13 17} Nxe3 {0.01/1 208} 21. Rxe3 {0.96/14 3} exd4 {0.01/1 110}
22. Rh3 {0.95/15 55} Rfe8 {(h6) 0.01/1 120} 23. Rxh7 {1.59/14 207} Kxh7 {
0.01/1 96} 24. Qh4+ {1.73/15 59} Kg6 {(Kg8) 0.01/1 221} 25. fxg7 {1.73/14 0}
Kxg7 {(Bxe4) 0.01/1 106} 26. Qh6+ {1.92/16 738} Kg8 {0.01/1 0} 27. g6 {
1.92/17 160} Bg5 {0.01/1 63} 28. gxf7+ {1.92/17 154} *
I cannot see more than a perpetual after 24... Kg8. What would be the follow up after that?

Miguel

24. Qh4+ Kg8 25. fxg7 Kxg7 26. Qh6+ Kg8 27. g6 Bg5 28. gxf7+ Kxf7 29. Rxg5 Ke7 30. Rg7+ Kd8 31. Rxc7 +-
Yes, that is straightforward, but what if I play 25. fxg7 f5!? I see white has good chances but it is still not defined.

Miguel
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Vinvin
Posts: 5300
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Nice tactical shot

Post by Vinvin »

michiguel wrote:
Vinvin wrote:
michiguel wrote:
Vinvin wrote:White play and win :
Rxh7!!

2r1r1k1/1bq1bppp/p2p1P2/1p4P1/3pP3/P1N4R/1PP4P/1K2Q1R1 w - - 0 23

from this game :

[Event "60m + 15s, rated"]
[Site "?"]
[Date "2008.12.16"]
[Round "?"]
[White "Great Ozzie, Rybka 3 960 32-bit"]
[Black "Junior Test, Thinker_53Bi"]
[Result "*"]
[WhiteElo "2465"]
[BlackElo "2489"]
[PlyCount "55"]
[EventDate "2008.12.16"]
[EventType "rapid"]

1. e4 {B/0 0} c5 {B/0 0} 2. Nf3 {B/0 0} d6 {B/0 0} 3. d4 {B/0 0} cxd4 {B/0 0}
4. Nxd4 {B/0 0} Nf6 {B/0 0} 5. Nc3 {B/0 0} a6 {B/0 0} 6. Be3 {B/0 0} e6 {B/0 0}
7. f3 {B/0 0} b5 {B/0 0} 8. a3 {B/0 0} Bb7 {B/0 0} 9. Qd2 {B/0 0} Nbd7 {B/0 0}
10. g4 {B/0 0} Nb6 {B/0 0} 11. O-O-O {B/0 0} Rc8 {B/0 0} 12. Kb1 {B/0 0} Nfd7 {
B/0 0} 13. Rg1 {B/0 0} Be7 {B/0 0} 14. g5 {B/0 0} Ne5 {B/0 0} 15. f4 {B/0 0}
Nec4 {0.01/1 95} 16. Qe1 {B/0 0} Qc7 {0.01/1 144} 17. Bxc4 {B/0 0} Nxc4 {
0.01/1 104} 18. Rd3 {B/0 0} O-O {0.01/1 118} 19. f5 {0.00/12 142} e5 {0.01/1 96
} 20. f6 {0.39/13 17} Nxe3 {0.01/1 208} 21. Rxe3 {0.96/14 3} exd4 {0.01/1 110}
22. Rh3 {0.95/15 55} Rfe8 {(h6) 0.01/1 120} 23. Rxh7 {1.59/14 207} Kxh7 {
0.01/1 96} 24. Qh4+ {1.73/15 59} Kg6 {(Kg8) 0.01/1 221} 25. fxg7 {1.73/14 0}
Kxg7 {(Bxe4) 0.01/1 106} 26. Qh6+ {1.92/16 738} Kg8 {0.01/1 0} 27. g6 {
1.92/17 160} Bg5 {0.01/1 63} 28. gxf7+ {1.92/17 154} *
I cannot see more than a perpetual after 24... Kg8. What would be the follow up after that?

Miguel

24. Qh4+ Kg8 25. fxg7 Kxg7 26. Qh6+ Kg8 27. g6 Bg5 28. gxf7+ Kxf7 29. Rxg5 Ke7 30. Rg7+ Kd8 31. Rxc7 +-
Yes, that is straightforward, but what if I play 25. fxg7 f5!? I see white has good chances but it is still not defined.

Miguel
Rybka give +3.50 after : f5 26. Qh8+ Kf7 27. Qh7 Rg8 28. exf5 Rxg7 29. g6+ Ke8 30. Qxg7 dxc3 31. Qf7+ Kd7 32. Re1 Qd8 33. f6
Bd5 34. Qxe7+ Kc6 35. Qxd8 Rxd8
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User avatar
michiguel
Posts: 6401
Joined: Thu Mar 09, 2006 8:30 pm
Location: Chicago, Illinois, USA

Re: Nice tactical shot

Post by michiguel »

Vinvin wrote:
michiguel wrote:
Vinvin wrote:
michiguel wrote:
Vinvin wrote:White play and win :
Rxh7!!

2r1r1k1/1bq1bppp/p2p1P2/1p4P1/3pP3/P1N4R/1PP4P/1K2Q1R1 w - - 0 23

from this game :

[Event "60m + 15s, rated"]
[Site "?"]
[Date "2008.12.16"]
[Round "?"]
[White "Great Ozzie, Rybka 3 960 32-bit"]
[Black "Junior Test, Thinker_53Bi"]
[Result "*"]
[WhiteElo "2465"]
[BlackElo "2489"]
[PlyCount "55"]
[EventDate "2008.12.16"]
[EventType "rapid"]

1. e4 {B/0 0} c5 {B/0 0} 2. Nf3 {B/0 0} d6 {B/0 0} 3. d4 {B/0 0} cxd4 {B/0 0}
4. Nxd4 {B/0 0} Nf6 {B/0 0} 5. Nc3 {B/0 0} a6 {B/0 0} 6. Be3 {B/0 0} e6 {B/0 0}
7. f3 {B/0 0} b5 {B/0 0} 8. a3 {B/0 0} Bb7 {B/0 0} 9. Qd2 {B/0 0} Nbd7 {B/0 0}
10. g4 {B/0 0} Nb6 {B/0 0} 11. O-O-O {B/0 0} Rc8 {B/0 0} 12. Kb1 {B/0 0} Nfd7 {
B/0 0} 13. Rg1 {B/0 0} Be7 {B/0 0} 14. g5 {B/0 0} Ne5 {B/0 0} 15. f4 {B/0 0}
Nec4 {0.01/1 95} 16. Qe1 {B/0 0} Qc7 {0.01/1 144} 17. Bxc4 {B/0 0} Nxc4 {
0.01/1 104} 18. Rd3 {B/0 0} O-O {0.01/1 118} 19. f5 {0.00/12 142} e5 {0.01/1 96
} 20. f6 {0.39/13 17} Nxe3 {0.01/1 208} 21. Rxe3 {0.96/14 3} exd4 {0.01/1 110}
22. Rh3 {0.95/15 55} Rfe8 {(h6) 0.01/1 120} 23. Rxh7 {1.59/14 207} Kxh7 {
0.01/1 96} 24. Qh4+ {1.73/15 59} Kg6 {(Kg8) 0.01/1 221} 25. fxg7 {1.73/14 0}
Kxg7 {(Bxe4) 0.01/1 106} 26. Qh6+ {1.92/16 738} Kg8 {0.01/1 0} 27. g6 {
1.92/17 160} Bg5 {0.01/1 63} 28. gxf7+ {1.92/17 154} *
I cannot see more than a perpetual after 24... Kg8. What would be the follow up after that?

Miguel

24. Qh4+ Kg8 25. fxg7 Kxg7 26. Qh6+ Kg8 27. g6 Bg5 28. gxf7+ Kxf7 29. Rxg5 Ke7 30. Rg7+ Kd8 31. Rxc7 +-
Yes, that is straightforward, but what if I play 25. fxg7 f5!? I see white has good chances but it is still not defined.

Miguel
Rybka give +3.50 after : f5 26. Qh8+ Kf7 27. Qh7 Rg8 28. exf5 Rxg7 29. g6+ Ke8 30. Qxg7 dxc3 31. Qf7+ Kd7 32. Re1 Qd8 33. f6
Bd5 34. Qxe7+ Kc6 35. Qxd8 Rxd8
I am analyzing blinfold, so I may be wrong, but... is the final position +3.50? after f7, Kd7, it looks like black contains the white passed pawns with Be6 -Ke7-Kf6. I have to say that white's h4-h5-h6 looks dangerous. Is is possible that Rybka's evaluation here is too speculative? There is more chances that I am missing a tactical shot tough. Can you analyze this final position to see what Rybka is really thinking? I still do not see a clear win.

Miguel
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Vinvin
Posts: 5300
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Nice tactical shot

Post by Vinvin »

michiguel wrote:
I am analyzing blinfold, so I may be wrong, but... is the final position +3.50? after f7, Kd7, it looks like black contains the white passed pawns with Be6 -Ke7-Kf6. I have to say that white's h4-h5-h6 looks dangerous. Is is possible that Rybka's evaluation here is too speculative? There is more chances that I am missing a tactical shot tough. Can you analyze this final position to see what Rybka is really thinking? I still do not see a clear win.

Miguel
[Event "60m + 15s, rated"]
[Site "?"]
[Date "2008.12.16"]
[Round "?"]
[White "Great Ozzie, Rybka 3 960 32-bit"]
[Black "Junior Test, Thinker_53Bi"]
[Result "*"]
[WhiteElo "2465"]
[BlackElo "2489"]
[PlyCount "73"]
[EventDate "2008.12.16"]
[EventType "rapid"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. f3 b5 8. a3 Bb7 9. Qd2 Nbd7 10. g4 Nb6 11. O-O-O Rc8 12. Kb1 Nfd7 13. Rg1 Be7 14. g5 Ne5 15. f4 Nec4 16. Qe1 Qc7 17. Bxc4 Nxc4 18. Rd3 O-O 19. f5 e5 20. f6 Nxe3 21.Rxe3 exd4 22. Rh3 Rfe8 23. Rxh7 Kxh7 24. Qh4+ Kg8 25. fxg7 f5 26. Qh8+ Kf7 27.Qh7 Rg8 28. exf5 Rxg7 29. g6+ Ke8 30. Qxg7 dxc3 31. Qf7+ Kd7 32. Re1 Qd8 33. f6 Bd5 34. Qxe7+ Kc6 35. Qxd8 Rxd8 36. g7 Bg8 37. h4 *

The 3 passed pawns are strong :

[d]3r2b1/6P1/p1kp1P2/1p6/7P/P1p5/1PP5/1K2R3 b - h3 0 37

Analysis by Rybka 3 32-bit :

1. +- (5.08): 37...b4 38.axb4 Tb8 39.bxc3 a5 40.h5 axb4 41.Rb2 bxc3+ 42.Rxc3 d5 43.h6 d4+ 44.Rxd4 Tb4+ 45.Rc3 Tc4+ 46.Rb2 Tb4+ 47.Ra3
2. +- (5.68): 37...Tb8 38.bxc3
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