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qpawn
25-07-2006, 12:06 PM
r5k1/2r2pP1/2pNb2p/p3P3/1p1P2P1/2q4P/1R3Q2/1K5R b - - 0 35

This position is one that I have been deep analysing with Fritz 8. In the game white has just moved out of check from the queen with 35 Kb1. In the game I continued 35...Qd3+ . Fritz 8 using Crafty engine 19.01 gives other alternatives as 35..a4, 35...Bd5, 35...Rca7, 35...c5.

Clearly [ to the human mind at least!!] black is winning . But the problem for black is which alternative cashes in on the advantage. I might put some of the engine's deep analysis up.

qpawn
25-07-2006, 12:18 PM
Here is some of the analysis using deep position function for Fritz. I might organise it a bit better and wipe out some of the word symbols. For the moment:

[Event "Rated game, 15m + 1s analysed deep"]
[Site "Main Playing Hall"]
[Date "2006.07.23"]
[Round "?"]
[White "Silfour"]
[Black "Qpawn"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "1919"]
[BlackElo "1797"]
[Annotator "THORNTON,ANDREW/Fritz 8 using Hiarcs 9 interface and crafty 19.01 engine "]
[PlyCount "76"]
[EventDate "2006.07.23"]
[TimeControl "900+1"]

1. d4 {1} d5 {2} 2. c4 {2} e6 {1} 3. Nc3 {4} Nf6 {1} 4. Bg5 {2} Be7 {2} 5. e3 {
2} Nbd7 {2} 6. cxd5 {4} exd5 {7} 7. Bd3 {2} h6 {2} 8. Bh4 {2} c6 {2} 9. Qc2 {1}
O-O {3} 10. Nge2 {2} Re8 {50} 11. O-O-O {15} Ng4 {15} 12. Bg3 {34} Nb6 {42} 13.
h3 {18} Nf6 {7} 14. Be5 {44} Bd6 {48} 15. f4 {6} Nc4 {28} 16. Bxc4 {8} dxc4 {8}
17. Bxd6 {20} Qxd6 {4} 18. e4 {2} Qe6 {75} 19. f5 {35} Qd7 {37} 20. g4 {64} b5
{52} 21. Ng3 {26} Qc7 {17} 22. e5 {29} b4 {24} 23. Na4 {19} Nd5 {112} 24. Qf2 {
44} Qa5 {18} 25. b3 {16} cxb3 {14} 26. axb3 {3} Nc3 {8} 27. Rd2 {9} Nxa4 {4}
28. bxa4 {2} Qxa4 {6} 29. Ra2 {3} Qb3 {25} 30. Ne4 {29} a5 {46} 31. Nd6 {35}
Re7 {52} 32. f6 {58} Rc7 {27} 33. fxg7 {10} Be6 {8} 34. Rb2 {9} Qc3+ {11} 35.
Kb1 {13}

THE FEN POSITION WITH THE NEXT MOVE/ALTERNATIVES ANALYSED Qd3+ {5} (35... a4 36. Qd2 (36. Ne4 Qd3+ 37. Qc2 Qxc2+ 38. Kxc2 b3+
$19 {-3.19/11}) (36. Rc2 Qd3 (36... Qb3+ 37. Ka1 Qa3+ 38. Kb1 Qd3 $19 {-2.94/11
}) 37. Qd2 Qxd2 38. Rxd2 Kxg7 $19 {-3.28/11}) 36... Qxd2 37. Rxd2 Kxg7 38. Rc1
Bd5 $19 {-3.06/11}) (35... Bd5 36. Rg1 (36. Rd1 a4 (36... Qxh3 37. Qf4 Qf3 38.
Qxf3 Bxf3 $19 {-2.74/11}) 37. Qe1 Qxe1 38. Rxe1 b3 $19 {-3.44/11}) (36. Re1 a4
(36... Qd3+ 37. Qc2 Qxc2+ 38. Kxc2 c5 $19 {-2.33/11}) 37. Qe3 Qxe3 38. Rxe3 b3
$19 {-2.94/11}) 36... Qd3+ (36... Qxh3 37. Rg3 Qh1+ 38. Rg1 Qf3 $19 {-1.69/11})
37. Kc1 Qxh3 38. Rg3 Qh1+ $19 {-2.33/11}) (35... Rca7 36. Nf5 (36. Qf6 Qe3 (
36... Qd3+ 37. Ka1 Bd5 38. Qxh6 Qh7 $17 {-1.24/11}) 37. g5 Qxg5 38. Qxg5 hxg5
$19 {-2.44/11}) (36. g5 a4 (36... Qd3+ 37. Qc2 Qxc2+ 38. Rxc2 hxg5 $19 {
-2.44/11}) 37. Rc1 Qd3+ 38. Qc2 Qxc2+ $19 {-2.65/11}) 36... a4 (36... Qd3+) 37.
Nxh6+ Kxg7 38. Qf6+ Kf8 $19 {-1.52/11}) (35... c5) 36. Kc1 (36. Ka1 {18} a4 (
36... Qa3+ {4} 37. Kb1 {4} Qd3+ {5} 38. Ka1 (38. Kc1 {15} a4 $19 {-3.11/11} (
38... Qc3+ {4} 39. Kd1 {36} Bb3+ {3} 40. Ke2 {11} Qxb2+ {2} 41. Ke3 {5} Qxf2+ {
2} 42. Kxf2 {2} Kxg7 {7} 43. Nf5+ {6} Kg6 {6} 44. Nh4+ {21} Kh7 {7} 45. Ke3 {8}
Bd5 {3} 46. Rf1 {12} a4 {4} 47. Rf6 {2} Bb3 {18} 48. Nf5 {4} Bc2 {2} 49. Rxh6+
{5} Kg8 {4} 50. Nd6 {4} a3 {4} 51. e6 {26} fxe6 {5} 52. Rg6+ {4} Kf8 {5} 53.
Rxe6 {4} a2 {4} 54. Rf6+ {1} Ke7 {4} 55. g5 {4} a1=Q {5} 56. Nc4 {20} Qe1+ {4}
57. Kf4 {12} Qf2+ {3} 58. Ke5 {4} Qe2+ {5} 59. Kf4 {9} Qe4+ {2} 60. Kg3 {5}
Qd3+ {2} 61. Kf4 {6} Qxc4 {2} 62. Rh6 {3} Qf1+ {3} 63. Kg3 {2} Ra3+ {3} 64. Kh4
{7} Qxh3# {(Lag: Av=1.08s, max=2.2s) 4})) 38... a4 $19 {-2.00/11}) 37. Qd2 Qxd2
38. Rxd2 b3 $19 {-3.35/11}) 36... a4 37. Qd2 Qxd2+ 38. Kxd2 b3 $19 {-3.33/11}
0-1


Note that for some sweird reason the computer lists how many seconds were taken for each move. Hence the bracketed numbers. Anyway, it does show all of the analysis that I had time to do in 6 hours. I didn't get up to 35...c5.

compchess
25-07-2006, 12:27 PM
r5k1/2r2pP1/2pNb2p/p3P3/1p1P2P1/2q4P/1R3Q2/1K5R b - - 0 35

This position is one that I have been deep analysing with Fritz 8. In the game white has just moved out of check from the queen with 35 Kb1. In the game I continued 35...Qd3+ . Fritz 8 using Crafty engine 19.01 gives other alternatives as 35..a4, 35...Bd5, 35...Rca7, 35...c5.

Clearly [ to the human mind at least!!] black is winning . But the problem for black is which alternative cashes in on the advantage. I might put some of the engine's deep analysis up.

The strongest......



Rybka 1.2a 32-bit:
2 00:00 320 5.371 +0.66 Kxg7
3 00:00 616 6.931 +0.63 Kxg7
4 00:00 1.352 13.707 +0.69 Kxg7 Qd2
4 00:00 2.872 22.449 +0.83 Qd3+ Ka1 Kxg7
5 00:00 4.056 25.797 +0.82 Qd3+ Ka1 Kxg7 Qf6+ Kh7
6 00:00 8.080 32.963 +0.76 Qd3+ Ka1 Kxg7 Rg1 Qxh3
7 00:01 23.328 39.032 +0.76 Qd3+ Ka1 a4 Qd2 Qxd2 Rxd2 Kxg7
8 00:01 57.520 43.857 +0.83 Qd3+ Ka1 Kxg7 Qf4 a4 Qf6+ Kh7 Nf5
9 00:03 130.896 48.829 +0.78 Qd3+ Ka1 a4 Qd2 Qxd2 Rxd2 Kxg7 Rc1 Bd5
10 00:04 182.040 51.551 +0.77 Qd3+ Ka1 a4 Qd2 Qxd2 Rxd2 Kxg7 Rg1 b3 g5
11 00:06 320.720 54.919 +0.70 Qd3+ Ka1 a4 Qd2 Qxd2 Rxd2 Kxg7 Rc1 Bd5 Rf2 a3
11 00:08 462.120 57.268 +0.76 a4 Qd2 Qxd2 Rxd2 Kxg7 Rc1 Bd5 Rg1 a3 g5
12 00:11 641.816 60.478 +0.68 a4 Qd2 Qxd2 Rxd2 Kxg7 Rc1 Bd5 Rf2 Rd8 Rf6 Be6
12 00:16 983.768 61.257 +0.78 Qd3+ Ka1 a4 Qd2 Qxd2 Rxd2 Kxg7 Rc1 Bd5 Rf2 a3 Rf6
13 00:22 1.350.952 61.859 +0.73 Qd3+ Ka1 a4 Qd2 Qxd2 Rxd2 Kxg7 Rc1 Bd5 Rf2 a3 Rf6 b3
14 00:36 2.239.136 62.813 +0.73 Qd3+ Ka1 a4 Qd2 Qxd2 Rxd2 Kxg7 Rc1 Bd5 Rf2 a3 Rf6 b3 Kb1
15 01:04 4.037.472 64.596 +0.79 Qd3+ Ka1 a4 Qd2 Qxd2 Rxd2 Kxg7 Rc1 b3 Nb5 Rcc8 Na3 Ra5 Kb2


And also the very strong.......


Zappa 1.1:
1 00:00 66 1 +1.43 Kxg7
2 00:00 602 1 +1.19 Qd3+ Kc1 Kxg7
3 00:00 3.458 345.800 +1.23 Kxg7 Rc2 Qd3
4 00:00 13.173 263.460 +0.98 Kxg7 Qd2 Qf3 Rh2 Qf1+ Qc1
5 00:00 34.155 262.730 +1.28 a4 Rf1 a3 Ka1
5 00:00 45.850 254.722 +1.56 a4 Rc2 Qd3 Qd2 Qxd2 Rxd2 Kxg7
6 00:00 73.108 252.096 +1.18 a4 Qd2 Qxd2 Rxd2 a3 Rf1 Kxg7
6 00:00 116.484 247.312 +1.20 Qd3+ Kc1 c5 Rc2 c4 Rf1 c3
6 00:00 146.150 251.549 +1.20 Qd3+ Kc1 c5 Rc2 c4 Rf1 c3
7 00:01 294.066 272.031 +1.03 Qd3+ Kc1 a4 Qd2 Qxd2+ Kxd2 b3 Rf1 Kxg7
7 00:01 415.728 274.952 +1.48 Kxg7 Qd2 Qf3 Qd1 Qa3 Qd2 Kh7
7 00:01 449.699 277.249 +1.48 Kxg7 Qd2 Qf3 Qd1 Qa3 Qd2 Kh7
8 00:03 882.754 284.392 +1.07 Kxg7 g5 Qd3+ Kc1 Qg6 Qf6+ Kh7 Qxg6+ fxg6 Rg2
8 00:06 1.730.002 291.835 +1.46 Qd3+ Ka1 Kxg7 Qd2 Qf3 Rh2 c5 Rc2 c4
8 00:06 1.794.268 292.750 +1.46 Qd3+ Ka1 Kxg7 Qd2 Qf3 Rh2 c5 Rc2 c4
9 00:10 3.086.751 298.380 +1.52 Qd3+ Kc1 c5 Rc2 a4 Rxc5 Rxc5+ dxc5 Qa3+ Qb2 Qe3+ Kb1 Qxc5
9 00:11 3.343.213 299.410 +1.52 Qd3+ Kc1 c5 Rc2 a4 Rxc5 Rxc5+ dxc5 Qa3+ Qb2 Qe3+ Kb1 Qxc5
10 00:22 6.630.688 296.250 +1.70 Qd3+ Ka1 a4 Rc1 Qxh3 Qd2 b3 Rc3 Qh4 Qd3 a3
10 00:26 7.677.426 296.231 +1.70 Qd3+ Ka1 a4 Rc1 Qxh3 Qd2 b3 Rc3 Qh4 Qd3 a3

And even the very.......


Clueless V1.00.00:
5 00:00 110.790 439.642 +1.98 Qd3+ Qc2 Qxc2+ Rxc2 Kxg7
6 00:00 172.065 450.431 +1.98 Qd3+ Qc2 Qxc2+ Kxc2 Kxg7 Kb1
7 00:02 899.006 450.855 +2.20 Qd3+ Qc2 Qxc2+ Rxc2 b3 Rf2 Kxg7
8 00:16 7.456.768 450.152 +2.20 Qd3+ Kc1 Qc3+ Kb1

Still Qd3+ is a nice move for you to think of over the board. a4 is just as ok.

:cool:

Chris

qpawn
25-07-2006, 12:36 PM
I nearly played 35..a4 at the time but my reason for choosing 35...Qd3+ was one a computer will never grasp: making my human opponent sweat a bit over the exposed king before I play the decisive move of ...a4 etc :) It worked because as the game continuation shows he/she blundered by moving the king to d1. :evil:

Bill Gletsos
25-07-2006, 01:23 PM
Why are you apparently using the Crafty engine instead of the Fritz8 engine.

qpawn
25-07-2006, 02:46 PM
There is no particular reason for using the crafty 19.01 engine for the deep position analysis. I was just trying a few of the alternative engines and decided to use crafty.

You are very observant to notice that :D

:clap: :clap: :clap: