Tigran Petrosian_selected positions_03

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Dr.Wael Deeb
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Location: Amman,Jordan

Re: Tigran Petrosian_selected positions_03

Post by Dr.Wael Deeb »

Steve B wrote:good analysis Dr.D ..Thanks

the problem with these positions is that they are not very popular for posting replies here because they do not lend themselves well to correct replies by engines
they do not leave a "warm and fuzzy comfort feeling "that some of the other positions posted here do ,which are purely tactical in nature
so we see positions being posted that involve piece sacs and the engines see them in 12 seconds or 17 seconds..why even i can find the correct moves for some of them
:P

Seriously though..i do think it is informative to show both types of positions..
the purely tactical which plays to the brute strength of today's engines running on powerful hardware
and the purely positional ..where we can see much progress can still be made by program authors today

Brute Force Regards
Steve
Thanks Steve,of course you are absolutely right....
I personaly think that the pure positional positions are more interesting than the tactical ones that can be solved for 12-20 seconds using your top chess engines running on a mediocre hardware....
The real challenge for me is these positional problems which expose the weakness of the current engines and help us and the programmers advance in this sticky area of the chess engines developement....
Particulary for this game,even the mighty Rybka 3 can't see the two moves made by Petrosian in a reasonable time....
_No one can hit as hard as life.But it ain’t about how hard you can hit.It’s about how hard you can get hit and keep moving forward.How much you can take and keep moving forward….
Steve B
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Joined: Tue Jul 31, 2007 4:26 pm

Re: Tigran Petrosian_selected positions_03

Post by Steve B »

Dr.Wael Deeb wrote: The real challenge for me is these positional problems which expose the weakness of the current engines and help us and the programmers advance in this sticky area of the chess engines developement....
in addition to being informative for engine development..
IMHO ..Positional problems are also more helpful in our understanding of the play of the game itself as humans then tactical positions are
you can see from some of the questions posted in your Petrosian threads ..some members have asked questions as to the reasons for a move..showing they have interest in the play of the game for their own understanding in addition to their engines understanding
Tactial positions dont help human understanding of The game as much..i think..because generally the winning tactical shot will be useful in only that position..although sometimes i guess the theme of the tactical shot can be added to the players memory for pattern recall and perhaps used again if a similar position is reached

still..personally i prefer positional positions
My Position Regards
Steve
Jim Logan
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Location: Nevada, USA

Re: Tigran Petrosian_selected positions_03

Post by Jim Logan »

Dr. Deeb - have we run out of positions already?
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Dr.Wael Deeb
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Joined: Wed Mar 08, 2006 8:44 pm
Location: Amman,Jordan

Re: Tigran Petrosian_selected positions_03

Post by Dr.Wael Deeb »

Jim Logan wrote:Dr. Deeb - have we run out of positions already?
No,I am coming back....
_No one can hit as hard as life.But it ain’t about how hard you can hit.It’s about how hard you can get hit and keep moving forward.How much you can take and keep moving forward….
Steve B
Posts: 3697
Joined: Tue Jul 31, 2007 4:26 pm

Re: Tigran Petrosian_selected positions_03

Post by Steve B »

Dr.Wael Deeb wrote:
Jim Logan wrote:Dr. Deeb - have we run out of positions already?
No,I am coming back....
Good
i can test the Mephisto Genius in preparation for the upcoming match of the Decade tomorrow

Eve Of Destruction Regards
Steve
Jim Logan
Posts: 74
Joined: Thu Mar 09, 2006 4:14 am
Location: Nevada, USA

Re: Tigran Petrosian_selected positions_03

Post by Jim Logan »

Wow - 2 months, no positions!
kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

"Top engines can't find this move"

Post by kgburcham »

Particulary for this game,even the mighty Rybka 3 can't see this move made by Petrosian in a reasonable time....
Tough positions,I promissed no trivial ones
even the top chess engines can't find this move,at least at a reasonable time....
Petrosian will fry your hardware

regards,
Wael Deeb



Petrosian - Boris Spassky, Moscow-Wch 1966

[d] q3rbk1/1b1n1ppp/2pppn2/1p6/3PP3/2PBBPN1/1PQN2PP/5RK1 w - - 0 1

Cyclone 2.0

13/26 0:01 +0.59 15.b4 Be7 16.Re1 Qa6 17.Nb3 Ra8 18.Na5 Bd8 19.Ra1 Nb6 20.e5 (1.608.978) 3440
14/27 0:02 +0.60 15.b4 Be7 16.Nb3 Qb8 17.Ra1 Qc7 18.Ra7 Ra8 19.Rxa8+ Bxa8 20.Qa2 Bb7 21.Qa7 d5 (2.466.539) 3380
15/29 0:05 +0.56 15.b4 Qa7 16.Re1 Qb8 17.Nb3 Qc7 18.Ra1 Be7 19.Na5 Ra8 20.Qf2 Ba6 21.Ra2 d5 (4.200.140) 3360
16/35 0:10 +0.54 15.b4 Qb8 16.Ra1 Be7 17.Nb3 Qc7 18.Qf2 Ra8 19.Rxa8+ Bxa8 20.Na5 g6 21.Bd2 e5 22.Be2 Qb8 23.Bd3 (8.570.142) 3348
17/35 0:17 +0.55 15.b4 Qb8 16.Ra1 Be7 17.h3 Rc8 18.Qb3 Qc7 19.f4 Ra8 20.Rxa8+ Bxa8 21.Nf3 Bb7 22.f5 e5 23.Qa2 Nb6 (14.302.091) 3357
18/38 0:33 +0.54 15.b4 Qb8 16.Ra1 Qc7 17.Ra7 Ra8 18.Rxa8 Bxa8 19.Qa2 Qb8 20.Nb3 Be7 21.Na5 Kh8 22.Ne2 Qc7 23.Nf4 (27.632.543) 3345


Little Thought v1.03

9/24 0:00 +0.93 15.Nb3 Be7 16.Ra1 Ba6 17.Qb1 Qa7 18.Qa2 Ra8 19.Qa5 (739.778) 816
10/24 0:02 +1.02 15.b4 Be7 16.Nb3 Qa7 17.Ra1 Ba6 18.Qf2 Ra8 19.d5 c5 (1.923.179) 703
13/30 0:25 +0.99 15.b4 e5 16.Nb3 Qc8 17.Bf2 exd4 18.cxd4 Be7 19.Ra1 Nb6 (22.522.407) 885
14/34 1:09 +0.99 15.b4 Qa7 16.Bf2 h5 17.Nb3 h4 18.Ne2 h3 19.d5 Nb6 20.Ra1 (71.692.078) 1033


Old Deep Fritz 1:

15.b4!
+/= (0.41) Depth: 11/32 00:00:01 7990kN
15.b4 Qa6 16.Nb3 Ra8 17.Ra1 Qb6 18.Re1 h6 19.d5 c5 20.dxe6 fxe6
+/= (0.38) Depth: 12/35 00:00:10 61433kN
15.b4!
+/= (0.41) Depth: 14/37 00:00:34 206mN
15.b4 Qa6 16.Nb3 Qb6 17.Re1 Qc7 18.c4 bxc4 19.Qxc4 Be7 20.Ra1
+/= (0.41) Depth: 15/42 00:01:36 591mN


Rybka

15.b4 Be7 16.Nb3
+/= (0.44) Depth: 6 00:00:00 5kN
15.b4 h6 16.Nb3 Qa7 17.Ra1
+/= (0.42) Depth: 7 00:00:00 11kN
15.b4 h6 16.Nb3 Qa7 17.Ra1
+/= (0.42) Depth: 8 00:00:00 13kN
15.b4 Qa7 16.Re1 Ra8 17.Nb3 Qb8 18.Na5
+/= (0.42) Depth: 10 00:00:00 87kN
15.b4 Qa7 16.Nb3 Ne5 17.Ra1 Qb6 18.Bf1 Nc4 19.Bxc4
+/= (0.37) Depth: 11 00:00:01 145kN
15.b4 Qa7 16.Bf2 g6 17.Nb3 Ra8 18.Ra1 Qb6 19.Na5
+/= (0.40) Depth: 12 00:00:03 442kN
15.b4 Qa7 16.Bf2 g6 17.Nb3 Ra8 18.Na5 Qb6 19.e5 Nd5
+/= (0.36) Depth: 13 00:00:03 499kN
15.b4 Qa7 16.Bf2 g6 17.Nb3 Ra8 18.Ra1 Qb8 19.Na5 Qc7 20.Qc1
+/= (0.31) Depth: 14 00:00:04 730kN
15.b4 Qa7 16.Bf2 g6 17.Nb3 Ra8 18.Ra1 Qb8 19.Na5 Qc7 20.Qc1 e5
+/= (0.31) Depth: 15 00:00:07 1260kN
15.b4 h6 16.Nb3 Qb8 17.Na5 Qc7 18.Bf4 Ra8 19.Rc1 Be7 20.Qd2 Bf8 21.Re1
+/= (0.31) Depth: 16 00:00:18 3123kN
15.b4 h6 16.Nb3 Qb8 17.Na5 Qc7 18.Bf4 Ra8 19.Rc1 Qb6 20.Qf2 Qc7 21.Be3 Be7
+/= (0.31) Depth: 17 00:00:36 6100kN
15.b4 h6 16.Nb3 Qb8 17.Na5 Qc7 18.Nxb7 Qxb7 19.Ra1 Nb6 20.Nf1 Nc4 21.Qa2 d5 22.Qa6 Qc7
+/= (0.32) Depth: 18 00:01:15 13117kN


Hiarcs

15.b4
+/= (0.44) Depth: 14/30 00:00:07 10486kN
15.b4 Qb8 16.Ra1 Be7 17.Nb3 Qc7 18.Na5 Ra8 19.Ra2 h6
+/= (0.45) Depth: 14/30 00:00:08 12179kN
15.b4 Qb8 16.Nb3 Qc7 17.Na5 Ra8 18.Nxb7 Qxb7
+/= (0.41) Depth: 15/31 00:00:12 18228kN
15.b4
+/= (0.41) Depth: 16/35 00:00:24 34446kN
15.b4 Qb8 16.Ra1 Be7 17.Ndf1 Qc7 18.f4 Nf8
+/= (0.42) Depth: 16/35 00:00:27 39614kN
15.b4 Be7 16.Nb3 Qd8 17.Na5 Qc7 18.Nxb7 Qxb7 19.f4
+/= (0.45) Depth: 17/41 00:01:32 130mN
15.b4 Qb8 16.Nb3 Qc7 17.Qe2
+/= (0.50) Depth: 18/41 00:02:53 242mN