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Previous Next Up Topic Rybka Support & Discussion / Rybka Discussion / Nice Position (1081 hits)
- - By InspectorGadget (****) [za] Date 2010-02-05 21:45
This game was played by Larry Christiansen against Chessmaster 9000. Larry played a mouth-watering move Rg3, but in a few moves later he lost the game due to incorrect follow up. Fritz 10 and Rybka 3 can see Rg3. Which other engines can see Rg3?

8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 53


Analysis by Rybka 3 :

1. =/+  (-0.47): 53...Rg3 54.hxg3 hxg3 55.Ra2 Rg4 56.Kg1 Qh5 57.Kf1 Qh1+ 58.Ke2 Qxg2+ 59.Kd3 Qf3+ 60.Kc2 Qxb3+ 61.Kxb3 f3 62.e5 Nxe5 63.Rf1 f2 64.Kc3 Ng6 65.Raxf2 gxf2 66.Rxf2 Nf4 67.Rh2+ Kg7 68.Rh1 Nxd5+
2. =  (-0.08): 53...Rh5 54.Rf3 Qf6 55.Rdf1 Rhg5 56.R3f2 Rg3
3. =  (-0.01): 53...Qf6 54.Bb7 Rh5 55.Rdf1 h3 56.gxh3 Rgg5 57.Bc8 Qd4 58.Bf5 Rh4 59.Qb1
4. =  (0.00): 53...Kg7 54.Qh3 Qf6 55.e5 Nxe5 56.Bf3 Nxf3 57.Qxf3 Qf7 58.Rd4 Qf6 59.Rd1 Qf7 60.Rd4 Qf6 61.Rd1 Qf7 62.Rd4 Qf6 63.Rd1 Qf7 64.Rd4 Qf6 65.Rd1 Qf7 66.Rd4 Qf6 67.Rd1 Qf7 68.Rd4 Qf6
5. =  (0.16): 53...h3 54.Qxh3+ Rh4 55.Qd3 Rg3 56.Qd2
Parent - By plicocf (***) [br] Date 2010-02-05 22:27
Is Rg3 a winning move? I didn´t find the win...

Paulo Soares
Parent - - By BrandonSi (***) [us] Date 2010-02-05 23:00 Edited 2010-02-06 00:12
That is very interesting. Rybka 3 is the only engine to find that move, and I tried about 7 engines, including Shredder 12 and Stockfish.
Parent - By InspectorGadget (****) [za] Date 2010-02-06 06:55
No, I'm not "that" Brandon.

:-D
Parent - - By Martin Thoresen (**) [se] Date 2010-02-06 07:01
That is certainly not true.

Stockfish (note, only with 2 cores even, using the rest) finds it after 47 seconds.

FEN:
8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 53


Stockfish 1.6.3 JA 64-bit 2CPU:
   1  00:00            61  350  +1,49  Kg7
   2  00:00           193  1.109  +1,25  Ne7 h3
   3  00:00           555  3.189  +1,05  Ne7 Bb7 f3 Qxf3
   4  00:00         1.071  6.120  +1,01  Ne7 Bb7 Qc5 Qc2
   5  00:00         2.537  14.497  +1,13  Ne7 Bb7 Qc5 Qb2 Rg8
   6  00:00         6.222  35.152  +0,96  Ne7 Bb7 Qc5 Qb2 Qe5 Qb4
   7  00:00         8.855  49.747  +1,05  Ne7 Bb7 Qc5 Qb2 Qe5 Qa3 f3 Qxf3
   8  00:00        38.145  203.983  +0,96  Ne7 Qf3 Nxd5 exd5 Qf5 Re2 Rg7 Rf1 Kh5
   9  00:00        65.443  335.605  +1,05  Ne7 Qf3 Nxd5 exd5 Kg7 Re2 Qf6 Kg1 Kg8 Re8+ Kf7
   9  00:00       122.080  575.849  +0,88  Qe7 Rdf1 Qf6 Qd3 Ne5 Qd2 Rg7 Rxf4 Rxf4 Rxf4
   9-  00:00       129.156  592.458  +0,72  Qf6 h3 Rg3
  10  00:00       269.607  1.061.444  +0,80  Qf6 Rdf1 Ne5 h3 Rg3 Qb2 f3 Rxf3 Rxf3 Rxf3 Qe7
  11  00:00       453.591  1.517.026  +0,72  Qf6 Rdf1 Ne5 h3 Rg3 Qb2 Rg6 Rxf4 Qg5 R4f2 Qe3 Rf8 Rxg2 Qxg2 Rxg2 Kxg2
  12  00:00       816.879  2.099.946  +0,64  Qf6 Rdf1 Ne5 h3 Rg3 Qb2 Rg6 Rxf4 Qg5 R4f2 Qe3 Rf8 Rxg2 Rh8+ Kg7 Rg8+ Kh6 Qxg2 Rxg2 Kxg2
  13  00:00     1.054.906  2.359.968  +0,60  Qf6 Rdf1 Ne5 h3 Rg3 Qb2 Rg6 Rxf4 Qg5 R4f2 Rg7 Qe2 Kh7 Be6
  14  00:00     1.661.178  2.801.311  +0,56  Qf6 Rdf1 Ne5 h3 Rg3 Qb2 Rg6 Rxf4 Qg5 R4f2 Rg7 Qd2 Qxd2 Rxd2 Rc3 Rf4 Kg5
  15-  00:01     5.546.377  3.627.453  +0,36  Qf6 c5 bxc5 Be6 Ne5 Bxg4 Nxg4 Rff1 Rg6 Rde1 Kg7 Re2 Qe5
  16  00:03    13.648.026  3.985.988  +0,52  Qf6 Rdf1 Qd4 Qh3 Ne5 Be6 Qxe4 Bxg4 Rxg4 Qc3 Qe3 Qc2 f3 gxf3 Rxc4 Qd1 Rf4 Rc2 Rf7
  16  00:05    23.296.671  3.976.898  +0,40  Rh5 Qf3 Rg3 Qe2 Re3 Qd2 h3 g3 Rxe4 Bxe4 Qxe4+ Kg1 Rg5 Qd4 Qxd4 Rxd4 fxg3 hxg3 Rxg3+ Kh2
  17  00:07    30.168.256  4.036.427  +0,04  Rh5 Qf3 Rg3 Qe2 Re3 Qd2 h3 g3 Rxe4 Bxe4 Qxe4+ Kg1 Rg5 Qd4 Qxd4 Rxd4 fxg3 hxg3 Rxg3+ Kh2 Ra3 Re2 Ne5 Rh4+ Kg5 Rxh3 Rxh3+ Kxh3 Nxc4
  18  00:11    47.964.308  4.122.415   0,00  Rh5 Rf3 Rhg5 Rf2 Rh5
  19  00:18    77.101.052  4.178.013   0,00  Rh5 Rf3 Rhg5 Rf2 Rh5
  20  00:26   112.252.220  4.234.973   0,00  Rh5 Rf3 Rhg5 Rf2 Rh5
  21  00:40   171.876.381  4.285.873   0,00  Rh5 Rf3 Rhg5 Rf2 Rh5
  21-  00:47   205.483.968  4.333.733  -0,20  Rg3 hxg3 hxg3 Rf3 Rg4 Kg1 Qh5 Kf1 Qh1+ Ke2 Qxg2+ Ke1 Qh2 Qc3 g2 Rh3+ Kg5
  22  01:18   346.460.219  4.433.385  -0,56  Rg3 hxg3 hxg3 Ra2 Rg4 Kg1 Qh5 Kf1 Qh1+ Ke2 Qxg2+ Kd3 Qf3+ Kc2 Qxb3+ Kxb3 f3 Kc3 f2 Rh1+ Kg5 Rf1 Rf4 e5 Nxe5 Raa1 Kg4 Kd2 Nxc4+ Ke2 Rd4 Bf3+ Kf4 Ra2
Best move: Rg3, Value: -0,56, Depth: 23, Time: 01:24,337, 373.955.202 Nodes, 4.434.899 N/sec.
Parent - By BigBen (***) Date 2010-02-06 11:29
New game
8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 1


Analysis by Stockfish 1.6.3 JA 64bit:

1...Rg3 2.Qb2 Qxb2 3.Rxb2 Ra3 4.Kg1 h3 5.Bf7 Re3 6.Bxg6 Rxg6 =/+  (-0.40 !)    Depth: 20   00:00:25  165mN

New game
8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 1


Analysis by Zappa Mexico II:

1...Rg3 2.hxg3 hxg3 3.Ra2 Rg4 4.Kg1 Qh5 5.Kf1 Qh1+ 6.Ke2 Qxg2+ 7.Kd3 Qf3+ 8.Kc2 Qxb3+ 9.Kxb3 f3 10.Kc3 Kg5 11.Kd4 Kf4 12.Be6 Rg5 13.Rh1 =/+  (-0.47)    Depth: 18/55   00:01:34  342mN
Parent - - By BrandonSi (***) [us] Date 2010-02-06 14:40
You're correct Martin. I'm using 1.6, so it did find it, it just took a bit longer than I expected, but after waiting for depth 23 as you did, it showed up.

I apologize, Stockfish people. I was wrong, Stockfish was not. :)
Parent - - By yanquis1972 (****) [us] Date 2010-02-06 15:26
you're not quite patient enough :) -- shredder also finds it, at d20 in this instance.

be sure to check what move is being examined, in this case i guessed that s12 would switch to Rg3 after about a minute because it stalled on the move while crunching the variations, even though it didn't show up as a pv until some time later.

8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - -


Engine: Deep Shredder 12 UCI (1024 MB)
by Stefan Meyer-Kahlen

12/33  0:01   +0.48    1...Rh5 2.Qh3 Rhg5 3.Qd3 Qf6 4.Rdf1 Ne5
                       5.Qd2 f3 6.gxf3 Rf4 7.Qe3 Kh7 8.Be6 Kh6
                       9.Bf5 (3.304.509) 2353 SB:1

13/33  0:02   +0.23    1...Rh5 2.Qh3 Rhg5 3.Qd3 Qf6 4.Rdf1 Kg7
                       5.Bb7 Ne5 6.Qh3 Qf8 7.Bd5 Rg6 8.Qc3 Kh7 (4.810.435) 2353 SB:1

14/34  0:02   +0.21    1...Rh5 2.Qh3 Rhg5 3.Qd3 Qf6 4.Rdf1 Kg7
                       5.Bb7 Ne5 6.Qh3 Qf8 7.Bd5 Rg6 8.Qa3 Qf6 (7.016.704) 2367 SB:1

15/43  0:09   0.00     1...Rh5 2.Rf3 Rhg5 3.Rf2 (21.364.884) 2361 SB:14

16/44  0:09   0.00     1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5 4.Rf3 Rhg5
                       5.Rf2 (23.007.011) 2367 SB:18

17/53  0:12   0.00     1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5 4.Rf3 Rhg5
                       5.Rf2 (30.313.864) 2390 SB:33

18/48  0:19   0.00     1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5 4.Rf3 Rhg5
                       5.Rf2 (47.119.095) 2370 SB:98

19/52  0:29   0.00     1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5 4.Rf3 Rhg5
                       5.Rf2 (71.298.089) 2405 SB:206

20/56  0:47   0.00     1...Rh5 2.Rf3 Rhg5 3.Rf2 Rh5 4.Rf3 Rhg5
                       5.Rf2 (115.167.007) 2434 SB:535

20/60  8:09   -0.33    1...Rg3 2.hxg3 hxg3 3.Rf3 Rg4 4.Kg1 Qh5
                       5.e5 Rg5 6.Qc3 Qh2+ 7.Kf1 Qh1+ 8.Ke2 Qxg2+
                       9.Kd3 Nxe5+ 10.Kd4 Nxf3+ 11.Qxf3 Qb2+
                       12.Kd3 Qb3+ 13.Kd2 Qxf3 14.Bxf3 (1.358.733.639) 2776
                       SB:18.989

21/59  9:31   -0.32    1...Rg3 2.hxg3 hxg3 3.Rf3 Rg4 4.Kg1 Qh5
                       5.e5 Rg5 6.Qc3 Qh2+ 7.Kf1 Qh1+ 8.Ke2 Qxg2+
                       9.Kd3 Nxe5+ 10.Kd4 Nxf3+ 11.Qxf3 Qb2+
                       12.Kd3 Qb3+ 13.Kd2 Qxf3 14.Bxf3 (1.591.259.615) 2781
                       SB:23.271
Parent - - By BrandonSi (***) [us] Date 2010-02-06 20:20
Yes, I need to work on the patience. :) I only have Shredder 12, not DS 12, so it is slow..

Thanks for posting the Shredder info!
Parent - By yanquis1972 (****) [us] Date 2010-02-06 20:49
ha -- i doubt your patience is an issue, it's just that most of the people on this forum just have ridiculous hardware so i assume it's the norm.  i myself don't usually let test positions run for more than 10-20 minutes -- i have a quad which is wonderful by me but its doors would be blown off by the comps of 90% of the posters here.  :)
Parent - By InspectorGadget (****) [za] Date 2010-02-07 08:17
I didn't get it with Deep Shredder 12 either. Maybe I should have been patient as well :)
Parent - - By mindbreaker (***) [us] Date 2010-02-07 10:25
Most of the engines I have tried found it.

Rybka 3 human      0:09
Rybka 3                 0:10
Rybka 3 Dynamic    0:19
spark-0.3a             0:22
List MP 11.64          0.32
Stockfish 1.6.2 JA   0:47
Zappa Mexico II      1:08
Bright-0.5c             2:01
Hyarcs 12 mp         8:32
Deep Shredder 11   9:17
Hydra v.8              11:50
Deep Fritz 11         14:40

There may however be a problem with the problem.  Nearly every engine backs off its exuberance.  And the real news-break: Rybka 3 Human that found it in 9 seconds decides it is garbage and goes back to Rh5 after 11:26 on my machine giving Rh5 an evaluation of -.19  Rybka 3 also changes eventually but Dynamic did not change even after an hour.

And if Rh5 is the best move how can we fault Naum 4 or Dymamic or any other engine who never go for Rg3?
Parent - - By InspectorGadget (****) [za] Date 2010-02-07 13:30

> Rybka 3 Human that found it in 9 seconds decides it is garbage


:-D
Parent - - By mindbreaker (***) [us] Date 2010-02-07 21:14
I rebooted and ran it again all night to verify that it does not reverse its opinion again.  It did not find rg3 as fast this time, it took 14 seconds instead of 9, and 21 minutes to reject it, but it did reject it again.  It appears Rg3 draws.  It continues the opinion that Rh5 is best as deep as I am wiling to go: depth 27.

New game - Rybka 3, Blitz:75'+15"
8/p1p5/Pp1p2nk/1P1Bq1r1/2P1Pprp/1Q6/5RPP/3R3K b - - 0 1


Analysis by Rybka 3 Human:

53...Ne7 54.Qf3 Ng8
  +/=  (0.52)   Depth: 6   00:00:00  8kN
53...Ne7 54.Qd3 Rg7 55.Rc1
  +/=  (0.53)   Depth: 7   00:00:00  14kN
53...Ne7 54.Qd3 Rg7 55.Rc1 Ng8
  +/=  (0.49)   Depth: 8   00:00:00  22kN
53...Ne7 54.Qd3 Rg7 55.Rdf1 Nxd5 56.cxd5 Kh7
  +/=  (0.54)   Depth: 9   00:00:00  44kN
53...h3
  +/=  (0.29 !)   Depth: 9   00:00:00  85kN
53...h3 54.Qxh3+ Nh4 55.Rdf1 Kh5 56.Rg1 Kg6 57.Qa3 Qd4 58.Qb2 Qxb2 59.Rxb2 Kf6 60.Rf1
  +/=  (0.39)   Depth: 9   00:00:00  176kN
53...h3 54.Qxh3+ Nh4 55.Rdf1 Kh5 56.Rg1 Kg6
  +/=  (0.39)   Depth: 10   00:00:00  182kN
53...h3 54.Qxh3+ Nh4 55.Rdf1 Kh5 56.Rg1 Kg6
  +/=  (0.39)   Depth: 11   00:00:00  240kN
53...h3 54.Qxh3+ Nh4 55.Rg1 Kg6 56.Qa3 Qd4 57.Qb2 Qe3 58.Qc2 Kg7 59.Re2 Qd4 60.Qb2 Qxb2
  +/=  (0.39)   Depth: 12   00:00:01  494kN
53...h3 54.Qxh3+ Nh4 55.Rg1 Kg6 56.Qa3 Qd4 57.Qb2 Qe3 58.Qc2 Kg7 59.Re2 Qd4 60.Qb2 Qxb2
  +/=  (0.39)   Depth: 13   00:00:02  652kN
53...Rh5
  =  (0.19 !)   Depth: 13   00:00:03  1094kN
53...Rh5 54.Rf3 Rhg5 55.Rf2
  =  (0.00)   Depth: 13   00:00:04  1311kN
53...Rh5 54.Rf3 Rhg5 55.Rf2
  =  (0.00)   Depth: 14   00:00:05  1605kN
53...Rh5 54.Rf3 Rhg5 55.Rf2
  =  (0.00)   Depth: 15   00:00:07  2218kN
53...Rh5 54.Rf3 Rhg5 55.Rf2
  =  (0.00)   Depth: 16   00:00:10  2876kN
53...Rg3
  =  (-0.20 !)   Depth: 16   00:00:14  4166kN
53...Rg3
  =/+  (-0.40 !)   Depth: 16   00:00:19  5686kN
53...Rg3 54.hxg3 hxg3[] 55.Rf3 Rg4 56.Kg1 Qh5[] 57.e5 Nxe5 58.Qc3 Qh2+ 59.Kf1[] Qh1+ 60.Ke2[] Qxg2+ 61.Ke1[] Nxf3+ 62.Qxf3[] Qh2 63.Rd2 Qh4 64.Kf1 Rg5 65.Qh1 Qxh1+ 66.Bxh1 Re5 67.Re2 Kg5 68.Be4
  =/+  (-0.39)   Depth: 16   00:00:25  7267kN
53...Rg3 54.hxg3 hxg3[] 55.Rf3 Rg4 56.Kg1 Qh5[] 57.e5 Nxe5 58.Qc3 Qh2+[] 59.Kf1[] Qh1+[] 60.Ke2[] Qxg2+[] 61.Ke1[] Nxf3+ 62.Qxf3[] Qh2 63.Rd2 Qh4 64.Kf1 Rg5 65.Qh1 Qxh1+ 66.Bxh1 Re5 67.Re2 Kg5 68.Be4 Re8
  =/+  (-0.29)   Depth: 17   00:00:53  14534kN
53...Rg3
  =/+  (-0.49 !)   Depth: 18   00:01:39  27580kN
53...Rg3 54.hxg3 hxg3[] 55.Rf3 Rg4 56.Kg1 Qh5[] 57.e5 Qh2+ 58.Kf1[] Qh1+ 59.Ke2[] Qxg2+[]
  =  (-0.18)   Depth: 18   00:05:03  82472kN
53...Rg3 54.hxg3 hxg3[] 55.Rf3 Rg4 56.Kg1 Qh5[] 57.e5 Qh2+ 58.Kf1[] Qh1+ 59.Ke2[] Qxg2+[] 60.Ke1[] Rg5 61.Rd2[] Rxe5+ 62.Kd1[] Qh1+ 63.Kc2[] Re1 64.Qd3 Ra1 65.Kb3[] Qc1 66.Rb2 Ne5 67.Qf5 Qd1+ 68.Rc2[] Qb1+
  =  (0.00)   Depth: 19   00:14:28  235mN
53...Rg3 54.hxg3 hxg3[] 55.Rf3 Rg4 56.Kg1 Qh5[] 57.e5 Qh2+ 58.Kf1[] Qh1+ 59.Ke2[] Qxg2+[] 60.Ke1[] Rg5 61.Rd2[] Rxe5+ 62.Kd1[] Qh1+ 63.Kc2[] Re1 64.Qd3 Ra1 65.Kb3[] Qc1 66.Rb2 Ne5 67.Qf5 Qd1+ 68.Rc2[] Qb1+
  =  (0.00)   Depth: 20   00:15:16  247mN
53...Rh5 54.Rf3 Kg7 55.Bb7 h3 56.gxh3 Rgh4 57.Rg1 Rg5 58.Rxg5 Qxg5 59.Rf1 Qh5 60.Qb2+ Qe5 61.Qg2 Kh6 62.Bc8 f3 63.Qxf3 Rf4 64.Qd3 Rxf1+
  =  (-0.14)   Depth: 20   00:20:59  348mN
53...Rh5 54.Rf3 Kg7 55.Bb7 h3 56.gxh3 Rgh4 57.Rg1 Rg5 58.Rxg5 Qxg5 59.Rf1 Qh5 60.Qb2+ Qe5 61.Qg2 Kh6 62.Bd5 Qf6 63.Qg3 Qe5
  =  (-0.20)   Depth: 21   00:24:44  414mN
53...Rh5 54.Rf3 Kg7 55.Bb7 h3 56.gxh3 Rgh4 57.Rg1 Kh6 58.Qc2 Rg5 59.Rgf1 Qd4 60.Qc1 Rgh5 61.Bc6 Qe5 62.Qa3 Qe6 63.Bd5 Qf6 64.Rg3
  =  (-0.17)   Depth: 22   00:33:48  570mN
53...Rh5 54.Rf3 Kg7 55.Bb7 h3 56.gxh3 Rgh4 57.Rg1 Kh6 58.Qc2 Rg5 59.Rgf1 Qd4 60.Qc1 Rgh5 61.Bc6 Qe5 62.Qa3 Qe6 63.Bd5 Qf6 64.Rg3
  =  (-0.17)   Depth: 23   00:48:16  817mN
53...Rh5 54.Rf3 Qf6 55.c5 bxc5 56.Be6 Rgg5 57.Bf5 Ne7 58.Bd7 Re5 59.Qc2 Ng6 60.Rdf1 Rhg5 61.Bc6 Re7 62.Bd5 Qd4 63.Bb7 Re8 64.Rd1 Qf6
  =  (-0.18)   Depth: 24   01:32:17  1562mN
53...Rh5 54.Rf3 Qf6 55.Rdf1 Rhg5 56.R3f2 Rg3 57.Qd1 Re3 58.Rf3 Qb2 59.R1f2 Qc3 60.Rf1 Qe5 61.Qc1
  =  (-0.19)   Depth: 25   03:04:44  3150mN, tb=1
53...Rh5 54.Rf3 Qf6 55.Rdf1 Rhg5 56.R3f2 Rg3 57.Qd1 Re3 58.Rf3 Qb2 59.R1f2 Qc3 60.Rf1 Qe5
  =  (-0.19)   Depth: 26   04:38:19  4810mN, tb=1
53...Rh5 54.Rf3 Qf6 55.Rdf1 Rhg5 56.R3f2 Rg3 57.Qd1 Re3 58.Rf3 Qb2 59.R1f2 Qc3 60.Rf1 Qe5
  =  (-0.19)   Depth: 27   07:44:44  8082mN, tb=23

(Octospasmic,  07.02.2010)
Parent - - By InspectorGadget (****) [za] Date 2010-02-08 07:23

> It appears Rg3 draws.


I agree. I checked it over and over and realised that with good defence it ends up being a draw.
Parent - - By Graeme (*) [au] Date 2010-02-08 12:46
This position is not quite as cute, but faster to compare engine analysis.  Interesting to see the difference between reported depth that different engines find the best play (which is an eventual win for white).

1NQ5/k1p1p3/7p/pP2P1P1/2P5/2pq4/1n6/6K1 w - - 0 1


Stockfish 1.63 takes 48 secs (d=14) to find 1. b6+ on my PC
[+4.24]  d=16  1.b6+ Kxb6 2.Nd7+ Kc6 3.Qa6+ Kxd7 4.e6+ Ke8 5.Qa8+ Qd8 6.g6 Qxa8 7.g7 Qf3 8.g8Q+ Qf8 9.Qg2 (0:00:50) 5658kN
[+1.01]  d=15  1.b6+ Kxb6 2.Nd7+ Kc6 3.Qa6+ Kxd7 4.e6+ Ke8 5.Qa8+ Qd8 6.g6 Qxa8 7.g7 Qf3 8.g8Q+ Qf8 9.Qg2 (0:00:49) 5536kN
[+0.20]  d=14  1.b6+ Kxb6 2.Nd7+ Kc6 3.Qa6+ Kxd7 4.e6+ Ke8 5.Qa8+ Qd8 6.g6 Qxa8 7.g7 Qf3 8.g8Q+ Qf8 9.Qg2 (0:00:48) 5479kN
[+0.00]  d=14  1.Qxc7+ Ka8 2.Qc6+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qa7+ Kd8 6.Qa8+ Kc7 7.Qa7+ (0:00:46) 5365kN
[+0.00]  d=13  1.Qxc7+ Ka8 2.Qc6+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qa7+ Kd8 6.Qa8+ Kc7 7.Qa7+ (0:00:32) 2766kN
[+0.00]  d=12  1.Qxc7+ Ka8 2.Qc6+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qa7+ Kd8 6.Qa8+ Kc7 7.Qa7+ (0:00:23) 1414kN
[+0.00]  d=11  1.Qxc7+ Ka8 2.Qc6+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qa7+ Kd8 6.Qa8+ Kc7 7.Qa7+ (0:00:15) 784kN
[+0.00]  d=10  1.Qxc7+ Ka8 2.Qc6+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qa7+ Kd8 6.Qa8+ Kc7 7.Qa7+ (0:00:11) 540kN
[+0.00]  d=9  1.Qxc7+ Ka8 2.Qc6+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qa7+ Kd8 6.Qa8+ Kc7 7.Qa7+ (0:00:08) 418kN
[-0.64]  d=8  1.Qxc7+ Ka8 2.Nc6 Qg3+ 3.Kf1 Qf3+ 4.Kg1 Qg4+ 5.Kh2 Qh4+ 6.Kg2 Qxg5+ 7.Kf3 Qf5+ 8.Kg3 Qg6+ 9.Kh2 Qh5+ 10.Kg3 Nxc4 11.Qxe7 Qg5+ (0:00:05) 213kN
[-0.68]  d=7  1.Qxc7+ Ka8 2.Nd7 Qg3+ 3.Kf1 Qf3+ 4.Kg1 Qg4+ 5.Kf1 Qxc4+ 6.Qxc4 Nxc4 7.g6 c2 (0:00:02) 129kN
[-0.28]  d=6  1.Qxc7+ Ka8 2.Nd7 Qg3+ 3.Kf1 Qf3+ 4.Kg1 Qd1+ 5.Kf2 Qd2+ 6.Kf3 Qd3+ 7.Kf2 hxg5 8.Qxa5+ Kb7 (0:00:01) 51kN
[-0.08]  d=5  1.Qxc7+ Ka8 2.Nc6 Qe3+ 3.Kf1 Qf4+ 4.Ke1 Qh4+ 5.Ke2 Qxc4+ 6.Ke3 (0:00:00) 10kN
[-0.08]  d=4  1.Qxc7+ Ka8 2.Nc6 Qe3+ 3.Kf1 Qf4+ 4.Ke1 Qh4+ 5.Ke2 Qxc4+ 6.Ke3 (0:00:00) 5kN
[+0.36]  d=3  1.Qxc7+ Ka8 2.Nc6 Qe3+ 3.Kf1 Nxc4 4.gxh6 Qxh6 5.Qxe7 (0:00:00) 2kN
[-0.04]  d=2  1.Qxc7+ Ka8 2.Nc6 hxg5 3.Nxa5 (0:00:00) 1kN
[-0.08]  d=1  1.Qxc7+ (0:00:00) 1kN

Komodo found it in 65 secs, d=18
[+7.38]  d=18  1.b6+ Kxb6 2.Nd7+ Kc6 3.Qa6+ Kxd7 4.e6+ Ke8 5.Qa8+ Qd8 6.g6 c2 7.Qc6+ Qd7 8.exd7+ Kd8 9.Qa8+ Kxd7 10.Qd5+ Kc8 11.Qf5+ Kd8 12.Qxc2 Nxc4 13.Qxc4 c6 14.g7 Kc7 15.g8Q h5 16.Qg3+ Kb6 (0:01:05) 56994kN
[+0.00]  d=18  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kd8 6.Qa8+ Kc7 7.Qc6+ (0:00:40) 34679kN
[+0.00]  d=17  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kd8 6.Qa8+ Kc7 7.Qc6+ (0:00:21) 17597kN
[+0.00]  d=16  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kd8 6.Qa8+ Kc7 7.Qc6+ (0:00:12) 10076kN
[+0.00]  d=15  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kd8 6.Qa8+ Kc7 7.Qc6+ (0:00:06) 5498kN
[+0.00]  d=14  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kd8 6.Qa8+ Kc7 7.Qc6+ (0:00:04) 3156kN
[+0.00]  d=13  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kd8 6.Qa8+ Kc7 7.Qc6+ (0:00:02) 1824kN
[+0.00]  d=12  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kd8 6.Qa8+ Kc7 7.Qc6+ (0:00:01) 1128kN
[+0.00]  d=11  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kd8 6.Qa8+ Kc7 7.Qc6+ (0:00:01) 771kN
[+0.00]  d=10  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kd8 6.Qa8+ Kc7 7.Qc6+ (0:00:00) 529kN
[+0.00]  d=9  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kd8 6.Qa8+ Kc7 7.Qc6+ (0:00:00) 429kN
[-0.37]  d=8  1.Qxc7+ Ka8 2.Nd7 Qg3+ 3.Kf1 Qf4+ 4.Ke2 Qe4+ 5.Kf2 Nd3+ 6.Kg3 Qf4+ 7.Kh3 Qf3+ 8.Kh2 (0:00:00) 76kN
[-0.25]  d=7  1.Qxc7+ Ka8 2.Nd7 Qg3+ 3.Kf1 Qf4+ 4.Ke2 Qe4+ 5.Kf1 Qf5+ 6.Ke2 Qe4+ 7.Kf1 Qf5+ 8.Ke2 (0:00:00) 20kN
[-0.19]  d=6  1.Qxc7+ Ka8 2.Nd7 Qg3+ 3.Kf1 Qf4+ 4.Ke2 Qe4+ 5.Kf1 Qf5+ 6.Ke2 (0:00:00) 15kN
[-0.29]  d=5  1.Qxc7+ Ka8 2.Nd7 Qg3+ 3.Kf1 Qf4+ 4.Ke2 Qe4+ 5.Kf1 Qf4+ 6.Ke2 Qe4+ 7.Kf1 Qf5+ 8.Ke2 (0:00:00) 10kN
[-0.27]  d=4  1.Qxc7+ Ka8 2.Nd7 Qg3+ 3.Kf1 Qf4+ 4.Ke2 Qe4+ 5.Kf1 Qf5+ 6.Ke2 (0:00:00) 9kN
[-0.28]  d=3  1.Qxc7+ Ka8 2.Nc6 Qe3+ 3.Kh2 Qd2+ 4.Kh1 Qc1+ 5.Kh2 Nxc4 6.Nxe7 Qxg5 7.Qxc4 Qxe5+ 8.Kg2 Qxe7 9.Qxc3 (0:00:00) 6kN
[-0.18]  d=2  1.Qxc7+ Ka8 2.gxh6 Nxc4 (0:00:00) 4kN
[+0.29]  d=1  1.Qxc7+ Ka8 2.gxh6 Nxc4 3.h7 Qxh7 4.Qxc4 Kxb8 5.Qxc3 (0:00:00) 4kN

And Rybka 2.3.2a in 81 secs, d=19
[+2.50]  d=19  1.b6+ Kxb6 2.Nd7+ Kc6 3.Qa6+ Kxd7 4.e6+ Ke8 5.Qa8+ Qd8 6.g6 Qxa8 7.g7 Qf3 (0:01:21) 10228kN
[+0.00]  d=19  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:01:16) 9599kN
[+0.00]  d=18  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:41) 5369kN
[+0.00]  d=17  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:23) 3061kN
[+0.00]  d=16  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:13) 1762kN
[+0.00]  d=15  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:07) 943kN
[+0.00]  d=14  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:04) 579kN
[+0.00]  d=13  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:02) 328kN
[+0.00]  d=12  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:01) 193kN
[+0.00]  d=11  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:01) 119kN
[+0.00]  d=10  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:00) 71kN
[+0.00]  d=9  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:00) 42kN
[+0.00]  d=8  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 6.Qb6+ Kc8 7.Qa6+ Kc7 (0:00:00) 25kN
[+0.00]  d=7  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 5.Qc6+ Kb8 (0:00:00) 17kN
[+0.00]  d=6  1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kc7 (0:00:00) 13kN
[+0.00]  d=5  1.Qxc7+ Ka8 2.Nd7 Qg3+ 3.Kf1 (0:00:00) 6kN
Parent - - By BrandonSi (***) [us] Date 2010-02-08 14:48 Edited 2010-02-08 14:51
Check this out.. ~10 seconds with bright (Core 2 Duo laptop) d=12 !

1NQ5/k1p1p3/7p/pP2P1P1/2P5/2pq4/1n6/6K1 w - - 0 1


Analysis by bright-0.5c:

1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Ka8 4.Qc6+ Kb8 5.Qb6+
  =  (0.00)   Depth: 6/31   00:00:00  114kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Ka8 4.Qc6+ Kb8 5.Qb6+
  =  (0.00)   Depth: 7/32   00:00:00  303kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Ka8 4.Qc6+ Kb8 5.Qb6+
  =  (0.00)   Depth: 8/39   00:00:00  603kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Ka8 4.Qc6+ Kb8 5.Qb6+
  =  (0.00)   Depth: 9/42   00:00:01  1139kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Ka8 4.Qc6+ Kb8 5.Qb6+
  =  (0.00)   Depth: 10/42   00:00:02  2517kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Ka8 4.Qc6+ Kb8 5.Qb6+
  =  (0.00)   Depth: 11/49   00:00:04  5436kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Ka8 4.Qc6+ Kb8 5.Qb6+
  =  (0.00)   Depth: 12/51   00:00:09  12372kN
1.b6+ Kxb6 2.Nd7+ Kc6 3.Qa6+ Kxd7 4.e6+ Ke8 5.Qa8+ Qd8 6.g6 Qxa8 7.g7 Qf3 8.g8Q+ Qf8 9.Qg2 Qf3 10.Qxf3 c6 11.Qh5+ Kd8 12.Qxa5+ Kc8 13.Qxc3
  +-  (5.56)   Depth: 12/51   00:00:10  13540kN
1.b6+ Kxb6 2.Nd7+ Kc6 3.Qa6+ Kxd7 4.e6+ Ke8 5.Qa8+ Qd8 6.g6 Qxa8 7.g7 Qf3 8.g8Q+ Qf8 9.Qg2 Qf3 10.Qxf3 c6 11.Qxc3 Kd8 12.Qxb2
  +-  (7.35)   Depth: 13/51   00:00:13  18994kN
Parent - - By yanquis1972 (****) [us] Date 2010-02-08 16:02
i've wondered lately if bright & spark don't deceive about depth in a manner similar to rybka. i don't think they do, but they are amazing at sniffing out tactical shots at much lower depth than other programs.
Parent - By yanquis1972 (****) [us] Date 2010-02-08 16:35
another example, from korthschnoj - udovic 1967

3qk2r/pp1bbp2/1n2p2p/1B1pP1N1/1B5Q/8/PP3PPP/2R3K1 w - - 0 26


Nxe6!

spark with 1 cpu simply sees it almost as if by magical intuition --

Analysis by spark-0.3aVC:

26.Bxe7 Qxe7 27.Bxd7+ Kxd7 28.f4 Nc4 29.Qh5 Qc5+ 30.Kh1
  =  (0.19)   Depth: 6/13   00:00:00  65kN
26.Bxe7 Qxe7 27.Bxd7+ Kxd7 28.f4 Qd8 29.Nf3 Qxh4 30.Nxh4
  =/+  (-0.50)   Depth: 7/15   00:00:00  139kN
26.Nxe6
  =  (-0.22)   Depth: 8/16   00:00:00  209kN
26.Nxe6 fxe6 27.Qh5+ Kf8 28.Rc3 Qe8 29.Bxe7+ Qxe7 30.Rf3+ Kg7 31.Rg3+ Kf8 32.Rf3+
  =  (0.00)   Depth: 8/18   00:00:00  267kN
26.Nxe6 fxe6 27.Qh5+ Kf8 28.Rc3 Kg7 29.Bxe7 Qxe7 30.Rg3+ Kf8 31.Rf3+ Kg7 32.Bd3 Kg8 33.Rg3+ Kf8 34.Qg6
  =  (0.05)   Depth: 9/20   00:00:00  427kN
26.Nxe6 fxe6 27.Qh5+ Kf8 28.Rc3 Kg7 29.Bxe7 Qxe7 30.Rg3+ Kf8 31.Rf3+ Kg7 32.Bd3 Kg8 33.Rg3+ Kf8 34.Qg6
  =  (0.05)   Depth: 10/20   00:00:00  644kN
26.Nxe6
  +/=  (0.30)   Depth: 11/24   00:00:00  1954kN
26.Nxe6 fxe6 27.Qh5+ Kf8 28.Rc3 Rh7 29.Qg6 Rg7 30.Qxh6 Kg8 31.Rh3 Bxb5 32.Bxe7 Qc8 33.Qh8+ Kf7 34.Rf3+ Kg6
  +/=  (0.62)   Depth: 11/24   00:00:00  1977kN
26.Nxe6
  +/-  (0.87)   Depth: 12/24   00:00:00  2182kN
26.Nxe6
  +/-  (1.37)   Depth: 12/24   00:00:01  2346kN
26.Nxe6 fxe6 27.Qh5+ Kf8 28.Rc3 Rh7 29.Qg6 Rf7 30.Qxh6+ Ke8 31.Qh8+ Bf8 32.Be2 Bc6 33.Bh5 Kd7 34.Bxf7 Bxb4
  +-  (1.50)   Depth: 12/26   00:00:01  2729kN

incredible tactical engine.
Parent - - By Gaмßito (****) [cr] Date 2010-02-08 15:05
Interesting. It's a well known position.

Now, look at what Rybka 3 and FB think on my ancient and 1-CPU pathetic hardware. :-)

1NQ5/k1p1p3/7p/pP2P1P1/2P5/2pq4/1n6/6K1 w - - 0 1


Analysis by Rybka 3 32-bit:

1.gxh6 Qg3+ 2.Kf1 Qf4+
  =  (-0.20)   Depth: 6   00:00:00  8kN
1.Qxc7+
  =  (0.00 !)   Depth: 6   00:00:00  8kN
1.Qxc7+ Ka8 2.Qc6+
  =  (0.00)   Depth: 6   00:00:00  9kN
1.Qxc7+ Ka8 2.Qc6+ Kxb8 3.Qb6+ Kc8 4.Qc6+ Kd8 5.Qa8+ Kd7
  =  (0.00)   Depth: 7   00:00:01  12kN
1.Qxc7+ Ka8[] 2.Qc6+ Kxb8 3.Qb6+ Kc8[] 4.Qc6+ Kd8[] 5.Qa8+ Kd7[] 6.Qc6+ Kd8[] 7.Qa8+ Kd7[] 8.Qc6+ Kd8[] 9.Qa8+ Kd7[] 10.Qc6+ Kd8[] 11.Qa8+ Kd7[] 12.Qc6+ Kd8[] 13.Qa8+ Kd7[] 14.Qc6+ Kd8[] 15.Qa8+ Kd7[] 16.Qc6+
  =  (0.00)   Depth: 8   00:00:02  26kN
1.Qxc7+ Ka8[] 2.Qc6+ Kxb8[] 3.Qb6+ Kc8[] 4.Qc6+ Kd8[] 5.Qa8+ Kd7[] 6.Qc6+ Kd8[] 7.Qa8+ Kd7[] 8.Qc6+ Kd8[] 9.Qa8+ Kd7[] 10.Qc6+ Kd8[] 11.Qa8+ Kd7[] 12.Qc6+ Kd8[] 13.Qa8+ Kd7[] 14.Qc6+ Kd8[] 15.Qa8+ Kd7[] 16.Qc6+
  =  (0.00)   Depth: 9   00:00:04  47kN
1.Qxc7+ Ka8[] 2.Qc6+ Kxb8[] 3.Qb6+ Kc8[] 4.Qc6+ Kd8[] 5.Qa8+ Kd7[] 6.Qc6+ Kd8[] 7.Qa8+ Kd7[] 8.Qc6+ Kd8[] 9.Qa8+ Kd7[] 10.Qc6+ Kd8[] 11.Qa8+ Kd7[] 12.Qc6+ Kd8[] 13.Qa8+ Kd7[] 14.Qc6+ Kd8[] 15.Qa8+ Kd7[] 16.Qc6+
  =  (0.00)   Depth: 10   00:00:07  93kN
1.Qxc7+ Ka8[] 2.Qc6+ Kxb8[] 3.Qb6+ Kc8[] 4.Qc6+ Kd8[] 5.Qa8+ Kd7[] 6.Qc6+ Kd8[] 7.Qa8+ Kd7[] 8.Qc6+ Kd8[] 9.Qa8+ Kd7[] 10.Qc6+ Kd8[] 11.Qa8+ Kd7[] 12.Qc6+ Kd8[] 13.Qa8+ Kd7[] 14.Qc6+ Kd8[] 15.Qa8+ Kd7[] 16.Qc6+
  =  (0.00)   Depth: 11   00:00:12  180kN
1.b6+
  =  (0.20 !)   Depth: 11   00:00:13  211kN
1.b6+
  +/=  (0.40 !)   Depth: 11   00:00:13  213kN
1.b6+
  +/-  (0.80 !)   Depth: 11   00:00:13  213kN
1.b6+
  +-  (1.60 !)   Depth: 11   00:00:13  213kN
1.b6+
  +-  (3.20 !)   Depth: 11   00:00:14  217kN
1.b6+
  +-  (6.40 !)   Depth: 11   00:00:15  238kN

(AMD, 08.02.2010)

Analysis by FB 1.01 w32:

1.Qxc7+ Ka8 2.Nd7 Qe3+ 3.Kf1 Qf3+ 4.Kg1 Qe3+
  =  (0.00)   Depth: 6   00:00:00  20kN
1.Qxc7+ Ka8 2.Nd7 Qe3+ 3.Kf1 Qf3+ 4.Kg1 Qe3+
  =  (0.00)   Depth: 6   00:00:00  21kN
1.Qxc7+ Ka8 2.Nd7 Qe3+ 3.Kf1 Qf3+ 4.Kg1 Qe3+
  =  (0.00)   Depth: 7   00:00:00  25kN
1.Qxc7+ Ka8 2.Nd7 Qe3+ 3.Kf1 Qf3+ 4.Kg1 Qe3+
  =  (0.00)   Depth: 7   00:00:00  27kN
1.Qxc7+ Ka8 2.Nd7 Qe3+ 3.Kf1 Qf3+ 4.Kg1 Qe3+
  =  (0.00)   Depth: 8   00:00:00  35kN
1.Qxc7+ Ka8 2.Nd7 Qe3+ 3.Kf1 Qf3+ 4.Kg1 Qe3+
  =  (0.00)   Depth: 8   00:00:00  40kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 9   00:00:00  89kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 9   00:00:00  138kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 10   00:00:00  155kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 10   00:00:00  253kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 11   00:00:00  277kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 11   00:00:01  474kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 12   00:00:01  519kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 12   00:00:02  1066kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 13   00:00:03  1137kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 13   00:00:05  2273kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 14   00:00:05  2411kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 14   00:00:10  4488kN
1.Qxc7+ Ka8 2.Qxa5+ Kxb8 3.Qb6+ Kc8 4.Qa6+ Kd8 5.Qa8+ Kd7 6.Qc6+ Kd8 7.Qa8+
  =  (0.00)   Depth: 15   00:00:10  4703kN
1.b6+
  =  (0.08 !)   Depth: 15   00:00:16  7832kN
1.b6+
  =  (0.08 !)   Depth: 15   00:00:16  7832kN
1.b6+
  =  (0.16 !)   Depth: 15   00:00:16  7844kN
1.b6+
  =  (0.16 !)   Depth: 15   00:00:16  7844kN
1.b6+
  +/=  (0.28 !)   Depth: 15   00:00:16  7855kN
1.b6+
  +/=  (0.28 !)   Depth: 15   00:00:16  7855kN
1.b6+
  +/=  (0.46 !)   Depth: 15   00:00:16  7867kN
1.b6+
  +/=  (0.46 !)   Depth: 15   00:00:17  7867kN
1.b6+
  +/-  (0.73 !)   Depth: 15   00:00:17  7879kN
1.b6+
  +/-  (0.73 !)   Depth: 15   00:00:17  7879kN
1.b6+
  +/-  (1.13 !)   Depth: 15   00:00:17  7894kN
1.b6+
  +/-  (1.13 !)   Depth: 15   00:00:17  7894kN
1.b6+
  +-  (1.73 !)   Depth: 15   00:00:17  7910kN
1.b6+
  +-  (1.73 !)   Depth: 15   00:00:17  7910kN
1.b6+
  +-  (2.63 !)   Depth: 15   00:00:17  7976kN
1.b6+
  +-  (2.63 !)   Depth: 15   00:00:17  7976kN
1.b6+
  +-  (3.98 !)   Depth: 15   00:00:17  8176kN
1.b6+
  +-  (3.98 !)   Depth: 15   00:00:17  8176kN
1.b6+
  +-  (6.00 !)   Depth: 15   00:00:18  8370kN
1.b6+
  +-  (6.00 !)   Depth: 15   00:00:18  8370kN
1.b6+
  +-  (9.03 !)   Depth: 15   00:00:20  9485kN
1.b6+
  +-  (9.03 !)   Depth: 15   00:00:20  9485kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 hxg5 4.Qb5+ Ka7 5.Qxa5+ Kb7 6.Qxc3 Na4 7.Qb3+ Nb6 8.c5 g4 9.cxb6 cxb6 10.Kf2 Kc7 11.Kg3 Kb7 12.Kxg4 Kc7 13.Qe6 Kd8 14.Qxb6+ Kc8 15.Qe6+ Kd8 16.Qc6 e6 17.Qd6+ Ke8 18.Qxe6+ Kd8
  +-  (12.42)   Depth: 15   00:00:33  16853kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 hxg5 4.Qb5+ Ka7 5.Qxa5+ Kb7 6.Qxc3 Na4 7.Qb3+ Nb6 8.c5 g4 9.cxb6 cxb6 10.Kf2 Kc7 11.Kg3 Kb7 12.Kxg4 Kc7 13.Qe6 Kd8 14.Qxb6+ Kc8 15.Qe6+ Kd8 16.Qc6 e6 17.Qd6+ Ke8 18.Qxe6+ Kd8
  +-  (12.42)   Depth: 15   00:00:33  16864kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 hxg5 4.Qb5+ Ka7 5.Qxa5+ Kb7 6.Qxc3 Na4 7.Qb3+ Nb6 8.c5 g4 9.cxb6 cxb6 10.Kf2 Kc7 11.Kg3 Kb7 12.Kxg4 Kc7 13.Qe6 Kd8 14.Qxb6+ Kc8 15.Qe6+ Kd8 16.Qc6 e6 17.Qd6+ Ke8 18.Qxe6+ Kd8
  +-  (12.50 !)   Depth: 16   00:00:35  18210kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 hxg5 4.Qb5+ Ka7 5.Qxa5+ Kb7 6.Qxc3 Na4 7.Qb3+ Nb6 8.c5 g4 9.cxb6 cxb6 10.Kf2 Kc7 11.Kg3 Kb7 12.Kxg4 Kc7 13.Qe6 Kd8 14.Qxb6+ Kc8 15.Qe6+ Kd8 16.Qc6 e6 17.Qd6+ Ke8 18.Qxe6+ Kd8
  +-  (12.50 !)   Depth: 16   00:00:35  18210kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 hxg5 4.Qb5+ Ka7 5.Qxa5+ Kb7 6.Qxc3 Na4 7.Qb3+ Nb6 8.c5 g4 9.cxb6 cxb6 10.Kf2 Kc7 11.Kg3 Kb7 12.Kxg4 Kc7 13.Qe6 Kd8 14.Qxb6+ Kc8 15.Qe6+ Kd8 16.Qc6 e6 17.Qd6+ Ke8 18.Qxe6+ Kd8
  +-  (12.58 !)   Depth: 16   00:00:37  19027kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 hxg5 4.Qb5+ Ka7 5.Qxa5+ Kb7 6.Qxc3 Na4 7.Qb3+ Nb6 8.c5 g4 9.cxb6 cxb6 10.Kf2 Kc7 11.Kg3 Kb7 12.Kxg4 Kc7 13.Qe6 Kd8 14.Qxb6+ Kc8 15.Qe6+ Kd8 16.Qc6 e6 17.Qd6+ Ke8 18.Qxe6+ Kd8
  +-  (12.58 !)   Depth: 16   00:00:37  19027kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (12.62)   Depth: 16   00:00:39  20410kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (12.62)   Depth: 16   00:00:39  20507kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (12.70 !)   Depth: 17   00:00:42  21972kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (12.70 !)   Depth: 17   00:00:42  21972kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (12.78 !)   Depth: 17   00:00:44  23250kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (12.78 !)   Depth: 17   00:00:44  23250kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (12.90 !)   Depth: 17   00:00:46  24378kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (12.90 !)   Depth: 17   00:00:46  24378kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (13.08 !)   Depth: 17   00:00:48  25722kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (13.08 !)   Depth: 17   00:00:48  25722kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (13.35 !)   Depth: 17   00:00:51  27320kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Kc5 7.Qb5+ Kd4 8.Qxa5 c5 9.Qb6 Kxe5 10.Qxc5+ Ke4 11.Qxg5 e5 12.Kf2 Kd4 13.Qg8 Kc5 14.Qd5+ Kb4 15.c5 Kb5 16.Qxe5 Kc6 17.Qd6+ Kb5 18.c6 Kb6 19.Ke3
  +-  (13.35 !)   Depth: 17   00:00:51  27320kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qb5+ Kc8 10.Qe8+ Kb7 11.Qxe6 Kb8 12.Qg8+ Ka7 13.Qxg5 Kb7 14.e6 Kc8 15.Qd5 Kb8 16.e7
  +-  (13.35)   Depth: 17   00:00:53  28556kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qb5+ Kc8 10.Qe8+ Kb7 11.Qxe6 Kb8 12.Qg8+ Ka7 13.Qxg5 Kb7 14.e6 Kc8 15.Qd5 Kb8 16.e7
  +-  (13.35)   Depth: 17   00:00:54  28757kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qb5+ Ka7 10.Qc6 Kb8 11.Qxe6 c5 12.Qd7 g4 13.e6 Ka8 14.e7
  +-  (13.36)   Depth: 18   00:01:03  34692kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qb5+ Ka7 10.Qc6 Kb8 11.Qxe6 c5 12.Qd7 g4 13.e6 Ka8 14.e7
  +-  (13.36)   Depth: 18   00:01:04  35242kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qb5+ Ka7 10.Qa4+
  +-  (13.44 !)   Depth: 19   00:01:15  41087kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qb5+ Ka7 10.Qa4+
  +-  (13.44 !)   Depth: 19   00:01:15  41087kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qc5+ Kb8 9.Qb4+ Ka7 10.Qxa4+ Kb7 11.Qb5+ Ka7 12.Qa4+
  +-  (13.52 !)   Depth: 19   00:01:20  44181kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qc5+ Kb8 9.Qb4+ Ka7 10.Qxa4+ Kb7 11.Qb5+ Ka7 12.Qa4+
  +-  (13.52 !)   Depth: 19   00:01:20  44181kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qc5+ Kb8 9.Qb4+ Ka7 10.Qxa4+ Kb7 11.Qb5+ Ka7 12.Qa4+
  +-  (13.64 !)   Depth: 19   00:01:27  48103kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qc5+ Kb8 9.Qb4+ Ka7 10.Qxa4+ Kb7 11.Qb5+ Ka7 12.Qa4+
  +-  (13.64 !)   Depth: 19   00:01:27  48103kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qc5+ Kb8 9.Qb4+ Ka7 10.Qxa4+ Kb7 11.Qb5+ Ka7 12.Qe8 c5 13.Qa4+ Kb6 14.Qb5+ Ka7 15.Qxc5+ Kb8 16.Qb6+ Kc8 17.Qxe6+ Kb7 18.Kf2 Kb8 19.c5 Kb7 20.Qd7+ Kb8
  +-  (13.82 !)   Depth: 19   00:01:36  52922kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qc5+ Kb8 9.Qb4+ Ka7 10.Qxa4+ Kb7 11.Qb5+ Ka7 12.Qe8 c5 13.Qa4+ Kb6 14.Qb5+ Ka7 15.Qxc5+ Kb8 16.Qb6+ Kc8 17.Qxe6+ Kb7 18.Kf2 Kb8 19.c5 Kb7 20.Qd7+ Kb8
  +-  (13.82 !)   Depth: 19   00:01:36  52922kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qc6 Kb8 9.Qxa4 Kb7 10.Qd7 g4 11.Qb5+ Ka8 12.Kf2 g3+ 13.Kxg3 Ka7 14.Kg4 c5 15.Qxc5+ Kb7 16.Qe7+ Kc8 17.Qxe6+ Kd8 18.Qd6+ Ke8
  +-  (14.09 !)   Depth: 19   00:01:48  59136kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qc6 Kb8 9.Qxa4 Kb7 10.Qd7 g4 11.Qb5+ Ka8 12.Kf2 g3+ 13.Kxg3 Ka7 14.Kg4 c5 15.Qxc5+ Kb7 16.Qe7+ Kc8 17.Qxe6+ Kd8 18.Qd6+ Ke8
  +-  (14.09 !)   Depth: 19   00:01:48  59136kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qb5+ Ka7 10.Qc6 Kb8 11.Qd7 Kb7 12.Qxe6 Kb8 13.Qe7 c6 14.e6 c5 15.Qxc5 g4 16.Qb5+ Ka8
  +-  (14.49 !)   Depth: 19   00:02:06  68721kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qb5+ Ka7 10.Qc6 Kb8 11.Qd7 Kb7 12.Qxe6 Kb8 13.Qe7 c6 14.e6 c5 15.Qxc5 g4 16.Qb5+ Ka8
  +-  (14.49 !)   Depth: 19   00:02:06  68721kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 c6 8.Qxc6 g4 9.Qxe6 g3 10.Qe7+ Ka8 11.Qd8+ Kb7 12.Qxa5 Kc6 13.Kg2 Kd7 14.Qd5+ Ke8 15.Kxg3
  +-  (15.09 !)   Depth: 19   00:02:37  85247kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 c6 8.Qxc6 g4 9.Qxe6 g3 10.Qe7+ Ka8 11.Qd8+ Kb7 12.Qxa5 Kc6 13.Kg2 Kd7 14.Qd5+ Ke8 15.Kxg3
  +-  (15.09 !)   Depth: 19   00:02:37  85247kN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qd7 Kb6 10.Qxe6+ Kb7 11.Kf2 Kb8 12.Qe8+ Kb7 13.Qd7 Ka6 14.Qxc7 g4 15.Qc6+ Ka7 16.e6 g3+ 17.Kxg3
  +-  (15.99 !)   Depth: 19   00:03:31  114mN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qd7 Kb6 10.Qxe6+ Kb7 11.Kf2 Kb8 12.Qe8+ Kb7 13.Qd7 Ka6 14.Qxc7 g4 15.Qc6+ Ka7 16.e6 g3+ 17.Kxg3
  +-  (15.99 !)   Depth: 19   00:03:31  114mN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qb5+ Ka7 10.Qc6 Kb8 11.Qxe6 Kb7 12.Kf2 g4 13.Qxg4 Kc6 14.Qd4 Kb7 15.e6 c5 16.Qxc5 Kb8
  +-  (17.34 !)   Depth: 19   00:05:36  176mN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 a4 8.Qxa4+ Kb7 9.Qb5+ Ka7 10.Qc6 Kb8 11.Qxe6 Kb7 12.Kf2 g4 13.Qxg4 Kc6 14.Qd4 Kb7 15.e6 c5 16.Qxc5 Kb8
  +-  (17.34 !)   Depth: 19   00:05:36  176mN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 c6 8.Qxc6 g4 9.Qxe6 g3 10.Qe7+ Ka8 11.Qd8+ Kb7 12.Qxa5
  +-  (19.36 !)   Depth: 19   00:10:11  319mN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 Nd3 4.Qxd3 hxg5 5.Qxc3 e6 6.Qb3+ Ka7 7.Qb5 c6 8.Qxc6 g4 9.Qxe6 g3 10.Qe7+ Ka8 11.Qd8+ Kb7 12.Qxa5
  +-  (19.36 !)   Depth: 19   00:10:11  319mN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 hxg5 4.Qb5+ Ka7 5.Qxa5+ Kb7 6.Qxc3 Kc6 7.Qxb2 Kd7 8.Qd2+ Ke6 9.Qxg5 c6 10.Kf2 Kf7 11.Qf5+ Kg7 12.Qd7 Kg6 13.Qxe7 Kf5 14.Ke3 Kg6 15.e6 c5 16.Qxc5 Kf6 17.Qd6 Kg6 18.e7+ Kf7
  +-  (21.48)   Depth: 19   00:21:05  661mN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 hxg5 4.Qb5+ Ka7 5.Qxa5+ Kb7 6.Qxc3 Kc6 7.Qxb2 Kd7 8.Qd2+ Ke6 9.Qxg5 c6 10.Kf2 Kf7 11.Qf5+ Kg7 12.Qd7 Kg6 13.Qxe7 Kf5 14.Ke3 Kg6 15.e6 c5 16.Qxc5 Kf6 17.Qd6 Kg6 18.e7+ Kf7
  +-  (21.48)   Depth: 19   00:21:06  662mN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 hxg5 4.Qb5+ Ka7 5.Qxa5+ Kb7 6.Qxc3 Kc6 7.Qxb2 Kd7 8.Qd2+ Ke6 9.Qxg5 c6 10.Kf2 Kf7 11.Qf5+ Kg7 12.Qd7 Kg6 13.Qxe7 Kf5 14.Ke3 Kg6 15.e6 c5 16.Qxc5 Kf6 17.Qd6 Kg6 18.e7+ Kf7
  +-  (21.56 !)   Depth: 20   00:28:36  909mN
1.b6+ Kxb6 2.Nd7+ Qxd7 3.Qxd7 hxg5 4.Qb5+ Ka7 5.Qxa5+ Kb7 6.Qxc3 Kc6 7.Qxb2 Kd7 8.Qd2+ Ke6 9.Qxg5 c6 10.Kf2 Kf7 11.Qf5+ Kg7 12.Qd7 Kg6 13.Qxe7 Kf5 14.Ke3 Kg6 15.e6 c5 16.Qxc5 Kf6 17.Qd6 Kg6 18.e7+ Kf7
  +-  (21.56 !)   Depth: 20   00:28:36  909mN

(AMD, 08.02.2010)

Regards,
Gaмßito.
Parent - - By Graeme (*) [au] Date 2010-02-09 08:51
yes, interesting.  I certainly don't know, but I guess the reported depth is just the point at which the engine has exhausted promising moves in much more depth, and abandoned "unlikely" moves in less than the depth shown.

Please forgive my ignorance - which engine is FB 1.01?
Parent - By Graeme (*) [au] Date 2010-02-10 03:46
aha - I have my answer

The FB and R3 analysis of this position looks very different; not sure if that helps to prove anything ;-)
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