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Up Topic The Rybka Lounge / Test Positions / new position
- - By Turtoise04 (*) Date 2011-01-19 20:41
8/3P4/n2K2kp/2p3nN/1b6/2p1p1P1/8/3B4 w - - 0 3


Why is so hard for engines to find the winning move for white here?
Parent - By Vempele (Silver) Date 2011-01-19 21:13
Not new. Search is your friend.
Parent - By ernest (****) Date 2011-01-19 21:23
Indeed, no-name on dual-core, 32-bit:

1.Nf4+ Kf5 2.Bc2+ Kg4 3.Bd1+ Kxg3 4.Ne2+ Kh2 5.Ke5
  -+  (-2.58)   Depth: 6/18   00:00:00  4kN
1.Nf4+
  -+  (-2.46 !)   Depth: 7/18   00:00:00  4kN
1.Nf4+
  -+  (-2.20 !)   Depth: 7/18   00:00:00  4kN
1.Nf4+ Kf5 2.Bc2+ Kg4 3.Bd1+ Kxg3 4.Ne2+ Kh2 5.Nxc3 Nf7+ 6.Ke7 Bxc3 7.Kxf7
  -+  (-1.66)   Depth: 7/19   00:00:00  5kN
1.Nf4+ Kf5 2.Bc2+ Kg4 3.Bd1+ Kxg3 4.Ne2+ Kf2 5.Kd5 Nf7 6.Ke4 h5
  -+  (-3.85)   Depth: 8/20   00:00:00  15kN
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Kc6 Nb8+ 4.Kc7 Nxd7 5.Nxe3+ Ke6 6.Bg4+ Ke5 7.Bxd7 Nxg3 8.Ng4+ Kd4 9.Nxh6
  -+  (-3.70)   Depth: 9/22   00:00:00  47kN
1.Nf4+ Kf5
  -+  (-3.87 --)   Depth: 10/29   00:00:00  100kN
1.Nf4+
  -+  (-3.52 !)   Depth: 10/34   00:00:00  157kN
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Kc6 Nb8+ 4.Kc7 Nxd7 5.Kxd7 Nxg3 6.Bc2+ Ke5 7.Nxe3 h5 8.Ng2 Nf5 9.Ne1 Ne3 10.Nf3+ Kf4
  -+  (-4.13)   Depth: 10/34   00:00:00  257kN
1.Nf4+
  -+  (-3.94 !)   Depth: 11/34   00:00:00  281kN
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Kc6 Nb8+ 4.Kc7 Nxd7 5.Nxe3+ Ke6 6.Bg4+ Ke5 7.Bxd7 Nxg3 8.Kb6 h5 9.Kb5 Kf4 10.Nd5+ Ke4 11.Bc6 Kd3 12.Nf4+ Kd2
  -+  (-3.87)   Depth: 11/34   00:00:00  344kN
1.Nf4+ Kf5
  -+  (-4.05 --)   Depth: 12/36   00:00:00  506kN
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Ke7 c4+ 4.Kf7 Nd6+ 5.Kg7 Ba5 6.Nxe3+ Ke6 7.Kxh6 Kxd7 8.g4 Ke6 9.g5 Bb6 10.Nc2 Nc7 11.Kh5 Nf5 12.Kg4 Ne3+ 13.Nxe3 Bxe3
  -+  (-4.31)   Depth: 12/38   00:00:00  909kN
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Ke7 c4+ 4.Kf7 Nd6+ 5.Kg7 Ba5 6.Nxe3+ Ke6 7.Kxh6 Kxd7 8.g4 Ke6 9.g5 Bb6 10.Nc2 Nf5+ 11.Kh7 Nc7 12.g6 Ne8 13.Bf3 Nf6+ 14.Kh8
  -+  (-4.42)   Depth: 13/38   00:00:00  1518kN
1.d8N
  -+  (-4.13 !)   Depth: 13/43   00:00:00  1995kN
1.d8N Ba5 2.Nc6 Bc7+ 3.Kd5 c2 4.Bxc2+ Kxh5 5.Bd1+ Kg6 6.Ne7+ Kf6 7.Ng8+ Kg7 8.Ne7 Nb4+ 9.Kxc5 Ne4+ 10.Kxb4 Bd6+ 11.Kc4 Bxe7 12.Kd4 e2 13.Bxe2 Nxg3 14.Bd1 h5 15.Ke5 Kg6 16.Bb3 Nf5 17.Bc2 Bd6+ 18.Ke6
  -+  (-4.05)   Depth: 13/43   00:00:00  2135kN
1.d8N Ba5 2.Nc6 Bc7+ 3.Kd5 c2 4.Bxc2+ Kxh5 5.Bd1+ Kg6 6.Ne7+ Kf6 7.Ng8+ Kg7 8.Ne7 Nb4+ 9.Kxc5 Ne4+ 10.Kxb4 Bd6+ 11.Kc4 Bxe7 12.Kd4 e2 13.Bxe2 Nxg3 14.Bd1 h5 15.Ke5 Kg6 16.Bb3 Nf5 17.Bc2 Bd6+ 18.Ke6
  -+  (-4.05)   Depth: 14/43   00:00:00  2367kN
1.d8N Ba5
  -+  (-4.24 --)   Depth: 15/43   00:00:01  3376kN
1.d8N Ba5
  -+  (-4.57 --)   Depth: 15/43   00:00:01  5697kN
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Ke7 c4+ 4.Kf7 Nd6+ 5.Kg7 Ba5 6.Nxe3+ Ke6 7.Kxh6 Kxd7 8.g4 Ke6 9.g5 Bb6 10.Nc2 Nf7+ 11.Kh5 Ne5 12.Bg4+ Kf7 13.Bf5 Kg7 14.Be4 Nc7
  -+  (-4.31)   Depth: 15/43   00:00:02  6553kN
1.Nf4+ Kf5
  -+  (-4.49 --)   Depth: 16/49   00:00:03  9745kN
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Ke7 c4+ 4.Kf7 Nd6+ 5.Kg7 Ba5 6.Nxe3+ Ke6 7.Kxh6 Kxd7 8.g4 Nb4 9.Kg6 Bb6 10.Nc2 Nxc2 11.Bxc2 Ke6 12.g5 Ke5 13.Bd1 Nf5 14.Bc2 Nh4+ 15.Kf7
  -+  (-4.66)   Depth: 16/49   00:00:04  14056kN
1.Nf4+ Kf5
  -+  (-4.85 --)   Depth: 17/49   00:00:08  26542kN
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Ke7 c4+ 4.Kf7 Nd6+ 5.Kg7 Ba5 6.Nxe3+ Ke6 7.Kxh6 Kxd7 8.Nc2 Nb4 9.Kg5 Nd3 10.Bf3 Bd8+ 11.Kg4 Ke6 12.Be2 Kd5 13.Kf3 Ne4 14.Bd1 Bg5
  -+  (-4.99)   Depth: 17/49   00:00:13  43874kN
1.Kd5 Ba5 2.Nf4+ Kf7 3.Kc4 Nb8 4.Bb3 Nxd7 5.Kb5+ c4 6.Bxc4+ Kf6 7.Nd5+ Ke5 8.Nxe3 Bd8 9.Kb4 Ne4 10.Bb5 Be7+ 11.Kb3 Ndc5+ 12.Kc2 h5 13.Bc6 Nxg3 14.Nd5 Bd8 15.Kxc3 h4 16.Kc4 Nge4
  -+  (-4.89)   Depth: 17/49   00:00:14  46999kN
1.Kd5
  -+  (-4.69 !)   Depth: 18/56   00:00:15  51844kN
1.Kd5 Ba5
  -+  (-5.09 --)   Depth: 18/56   00:00:17  57796kN
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Ke7 c4+ 4.Kf7 Nd6+ 5.Kg7 Ba5 6.Nxe3+ Ke6 7.Kxh6 Kxd7 8.Kg5 Nb4 9.Kf4 Bb6 10.Ba4+ Ke6 11.Nc2 Nd3+ 12.Kg4 Ke5 13.Kf3 Nf5 14.g4 Nd4+ 15.Nxd4 Kxd4 16.Ke2 Bd8 17.Bc2
  -+  (-4.99)   Depth: 18/56   00:00:19  66304kN
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Ke7 c4+ 4.Kf7 Nd6+ 5.Kg7 Ba5 6.Nxe3+ Ke6 7.Kxh6 Kxd7 8.Kg5 Nb4 9.g4 Nd3 10.Kg6 Ke6 11.g5 Bb6 12.Ng2 Nf5 13.Ba4 Ke5 14.Bd1 Ke4 15.Bc2 Bc5 16.Ne1 Ne7+ 17.Kf7
  -+  (-5.16)   Depth: 19/56   00:00:33  113mN
1.Kd5 Ba5 2.Nf4+ Kf7 3.Kc4 Nb8 4.Bb3 Nxd7 5.Kb5+ c4 6.Bxc4+ Kf6 7.Kxa5 c2 8.Ne2 Ne4 9.Kb4 Nxg3 10.Nc1 h5 11.Kc3 h4 12.Kxc2 h3 13.Bd5 Ke5 14.Nd3+ Kd4 15.Nf4 h2 16.Bg2 Ne5 17.Kd1 Nd3 18.Nxd3 Kxd3 19.Bf3 Kd4 20.Ke1 h1Q+ 21.Bxh1 Nxh1 22.Ke2 Ng3+ 23.Kd1 Kd3 24.Ke1
  -+  (-5.01)   Depth: 19/56   00:00:34  117mN
1.Kd5 Ba5 2.Nf4+ Kf7 3.Kc4 Nb8 4.Bb3 Nxd7 5.Kb5+ c4 6.Bxc4+ Kf6 7.Kxa5 c2 8.Ne2 Ne4 9.Kb4 Nxg3 10.Nc1 h5 11.Kc3 h4 12.Kxc2 h3 13.Bd5 Ke5 14.Bf3 h2 15.Bg2 Kf4 16.Nd3+ Kf5 17.Kd1 Ne5 18.Nxe5 Kxe5 19.Ke1 Kf5 20.Kd1 Kf4 21.Ke1 h1Q+ 22.Bxh1 Nxh1 23.Kd1 Ng3
  -+  (-5.02)   Depth: 20/56   00:00:42  142mN
1.Kd5 Ba5
  -+  (-5.22 --)   Depth: 21/56   00:01:00  205mN
1.Kd5 Ba5 2.Nf4+ Kf7 3.Kc4 Nb8 4.Bh5+ Kg7 5.d8Q Bxd8 6.Kxc3 Ne4+ 7.Kd3 Nxg3 8.Bd1 Bg5 9.Kxe3 Kf6 10.Kf3 Nf5 11.Nh3 c4 12.Ke4 Nc6 13.Nf2 Ne5 14.Kd5 Ne3+ 15.Kd4 Nxd1 16.Nxd1 h5 17.Nf2 h4 18.Ne4+ Kf5 19.Nd6+ Kg4 20.Kxe5 Bf4+ 21.Kd5 Bxd6 22.Kxc4
  -+  (-5.61)   Depth: 21/56   00:02:19  475mN, tb=1
1.Nf4+ Kf5 2.Nd5 Ne4+ 3.Kc6 Nb8+ 4.Kc7 Nxd7 5.Nxe3+ Ke6 6.Bg4+ Ke5 7.Bxd7 Nxg3 8.Kb6 h5 9.Ba4 h4 10.Kb5 Ke4 11.Nc2 h3 12.Kc4 h2 13.Bc6+ Kf4 14.Bg2 h1Q 15.Bxh1 Nxh1 16.Kb3 Ke4 17.Ne1 Nf2 18.Nc2 Kd3
  -+  (-5.38)   Depth: 21/56   00:03:13  654mN, tb=3
1.Nf4+ Kf5
  -+  (-5.60 --)   Depth: 22/56   00:04:53  993mN, tb=5
1.Nf4+ Kf5 2.Kd5 Nc7+ 3.Kc4 Nf7 4.Bc2+ Kf6 5.Kd3 Ne5+ 6.Kxe3 Nxd7 7.Ke2 Nb6 8.Ng2 Ncd5 9.Be4 c4 10.Kd1 Bd6 11.g4 Ke5 12.Bg6 Kd4 13.Bf5 Na4 14.Ne1 Nb2+ 15.Ke2 Nf4+ 16.Kf3 Nbd3 17.Nc2+ Ke5 18.Be4 Be7
  -+  (-5.72)   Depth: 22/62   00:09:59  2057mN, tb=9
1.Kd5 Ba5 2.Nf4+ Kf7 3.Kc4 Nb8 4.Kb5 Bd8 5.Ne2 Nxd7 6.Kc6 Ne5+ 7.Kd5 Bf6 8.Nxc3 Nef3 9.Ne2 Bd4 10.Nf4 Kf6 11.Bc2 Ne5 12.Nh5+ Ke7 13.Nf4 Ngf3 14.Bd1 Kf6
  -+  (-5.61)   Depth: 22/62   00:10:24  2147mN, tb=9
1.Kd5 Ba5 2.Nf4+ Kf7 3.Kc4 Nb8 4.Kb5 Bd8 5.Ne2 Nxd7 6.Kc6 Ne5+ 7.Kd5 Bf6 8.Nxc3 Nef3 9.Ne2 Bd4 10.Nf4 Kf6 11.g4 Ne5 12.Be2 Kf7 13.Nd3 Nxd3 14.Bxd3 Nf3 15.Bf1 Ne5 16.Be2 Kf6
  -+  (-5.63)   Depth: 23/62   00:12:21  2566mN, tb=9
1.Bc2+
  -+  (-5.37 !)   Depth: 23/62   00:16:49  3489mN, tb=12

1.Bc2+
  -+  (-4.91 !)   Depth: 23/62   00:16:53  3502mN, tb=13
1.Bc2+
  -+  (-3.54 !)   Depth: 23/62   00:16:56  3514mN, tb=16
1.Bc2+
  =  (0.08 !)   Depth: 23/62   00:17:04  3542mN, tb=18
1.Bc2+ Kxh5 2.d8Q Kg4 3.Qe8 c4+ 4.Kc6 Ba3 5.Bd1+ Kh3 6.Qxe3 Nb4+ 7.Kb5 c2 8.g4+ Kg2 9.Qd2+ Kg3 10.Qc3+ Kh4 11.Bxc2 Nxc2 12.Qxc2 Bd6 13.Kxc4 Bf4
  +-  (3.48)   Depth: 23/69   00:22:53  4935mN, tb=911
1.Bc2+ Kxh5
  +-  (3.31 --)   Depth: 24/69   00:23:08  4989mN, tb=917
1.Bc2+
  +-  (3.64 !)   Depth: 24/69   00:24:38  5336mN, tb=1155
1.Bc2+ Kxh5 2.d8Q Kg4 3.Bd1+ e2 4.Bxe2+ Kxg3 5.Qg8 c4+ 6.Ke5 c2 7.Qxc4 Nc5 8.Qxc2 Nce4 9.Qc1 Kf2 10.Bd3 Nd2 11.Qb2 Ngf3+ 12.Kd5 Ba5 13.Be4 Ng5 14.Qf6+ Kg3 15.Qe5+ Kf2 16.Qh2+ Ke3 17.Bh1 Ndf3 18.Qxh6 Kf2 19.Qg7 Bd2 20.Qf6 Ba5 21.Qa1 Bd2
  +-  (3.70)   Depth: 24/69   00:25:29  5526mN, tb=1293
1.Bc2+
  +-  (3.87 !)   Depth: 25/69   00:27:07  5897mN, tb=1702
1.Bc2+ Kxh5 2.d8Q Kg4 3.Bd1+ e2 4.Bxe2+ Kxg3 5.Qg8 c4+ 6.Ke5 c2 7.Qxc4 Nc5 8.Qxc2 Nce4 9.Qd3+ Kf2 10.Bd1 Bd2 11.Qe2+ Kg3 12.Kf5 Nd6+ 13.Kg6 Nde4 14.Bc2 Kf4 15.Qh2+ Kf3 16.Qxh6 Kg2 17.Qg7 Ng3 18.Bd1 Kf2 19.Qd4+ Be3 20.Qb2+ Ke1 21.Qb3
  +-  (4.04)   Depth: 25/69   00:29:01  6327mN, tb=2042
1.Bc2+ Kxh5 2.d8Q Kg4 3.Bd1+ e2 4.Bxe2+ Kxg3 5.Qg8 c4+ 6.Ke5 c2 7.Qxc4 Nc5 8.Qxc2 Nce4 9.Qd3+ Kf2 10.Bd1 Bd2 11.Qe2+ Kg3 12.Kf5 Nd6+ 13.Kf6 Nde4+ 14.Kg6 Kf4 15.Qh2+ Ke3 16.Qxh6 Kd3 17.Kf5 Ng3+ 18.Kg4 N3e4 19.Qa6+ Kd4 20.Bb3 Nf2+ 21.Kf5 Nge4 22.Qb6+ Kc3 23.Ba4 Ng3+ 24.Ke6 Nge4 25.Kd5 Kd3 26.Qd4+ Ke2 27.Bc2
  +-  (3.96)   Depth: 26/69   00:31:08  6814mN, tb=2949
1.Bc2+
  +-  (4.15 !)   Depth: 27/69   00:35:29  7818mN, tb=4536
Parent - - By Akbarfan (***) Date 2011-01-19 21:26
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?pid=298466#pid298466

Analysis by Rybka 3w91 clusterJB:
.....

1.Bc2+ Kxh5[] 2.d8Q[] Kg4[] 3.Kc6[] Nf3 4.Qg8+[] Kh3 5.Qe6+[] Kg2 6.Qxe3[] Nd4+ 7.Kb7[] Nxc2 8.Qe2+ Kxg3 9.Qxc2 Nb8 10.Kxb8 h5 11.Qd3+ Kf4 12.Kb7 h4 13.Kc6 h3 14.Qxh3 Ke4 15.Qh7+ Kd4 16.Qf5
  +-  (5.12)   Depth: 25   00:54:20  22869mN, tb=132990
Parent - - By Alien-51 (*) Date 2011-01-19 22:32
Rybka 3w91?? is it rybka 3 with update??  if so.. why not release rybka 3 with update like 3.1???    :neutral:
Parent - By Akbarfan (***) Date 2011-01-20 14:17
No, it's the actual CLUSTER Version from 2009-10-25, which you can see if you followed the link.
Parent - - By ernest (****) Date 2011-01-25 00:08

> http://www.chessbase.com/puzzle/puzz16a.htm


What year was that? (couldn't find the year by looking at the page, even looking at the html "source" :eek:)
Parent - - By ThudanBlunder (**) Date 2011-01-25 00:16

> What year was that?


October 2003
:
Parent - - By ernest (****) Date 2011-01-25 00:25

> October 2003


Just curious: how did you find that date (I couldn't...)?
Parent - - By ThudanBlunder (**) Date 2011-01-25 20:53

> Just curious: how did you find that date (I couldn't...)?


I searched for 'Plaskett'.

Note that their original version was cooked.
:
Parent - By ernest (****) Date 2011-01-26 18:21

> I searched for 'Plaskett'.


Bravo! smart move... :cool:
Up Topic The Rybka Lounge / Test Positions / new position

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