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Up Topic The Rybka Lounge / Computer Chess / Brilliant move
- - By pawel.newyork (*) Date 2012-06-15 04:44
This position comes from my own game played on play.ok . I played black and of course I missed my Brilliant Move. My question is, does anyone can find the only playable move in this position without using an engine? I'm asking because even after analyzing this position I couldn't understand, Why do so and not otherwise.After a long analysis I understood the logic, So this is a matter of how good can be a chess player having limited time to analyze. I failed but I 'm curious if anyone could solve this puzzle in reasonable time? At first glance, it seems that the White has a big advantage... (Black Move)
Attachment: BrilantMove.png (48k)
Parent - - By fejman (**) Date 2012-06-15 05:13
Im not sure but interesting is Rf2  (after about 5 min 1 brain  frequency=7Hz)

BR
Parent - - By pawel.newyork (*) Date 2012-06-15 05:43
Not, the move is a little tricky, that is why I posted this position, after Rf2 position is lost by black -6,5 although you are close. Can you imagine having such position during real game for world championship?
Parent - By chessfans (**) Date 2012-06-15 06:01
I think the best idea is Rxh2+
Parent - - By chessfans (**) Date 2012-06-15 06:09
Wait minute after looking at this with an engine are you sure Rxf2 isn't the best move? It looks like a mate in 8.
Parent - By pawel.newyork (*) Date 2012-06-15 13:12
Mate in 8 after Rxf2?  No kidding..;) No, the problem is that this only move that black can play looks meaningless at first glance, how could such "stupid" move save black position and let them have a small advantage over white?. As for me the logic of this position is most interesting and on the basis of this example can be seen how difficult chess are, how hard is to evaluate a given position not doing a mistake.
Parent - - By RFK (Gold) Date 2012-06-16 03:35 Edited 2012-06-16 17:09
never mind...:grin:
Parent - - By Barnard (Bronze) Date 2012-06-16 04:06
Robert,you copy/pasted fine the position?

just one question,if the pawn on a2 is 'white',how can play black and promote that pawn to the square a1 a queen?
Parent - - By RFK (Gold) Date 2012-06-16 17:08
Shit! I forgot to flip the board! du! :yell:
Parent - - By Barnard (Bronze) Date 2012-06-16 19:23
you were too happy with your mate in 9,right? :wink:
Parent - - By RFK (Gold) Date 2012-06-16 21:50
This is  in point of fact, what happens when you drink too much coffee! A good move gone bad!
Parent - By Barnard (Bronze) Date 2012-06-16 22:02
coffee...apart from the women,the worst venom...and i love both! :smile:
Parent - By Labyrinth (*****) Date 2012-06-15 07:50
I'll try something odd, exd4?
Parent - By irulats (****) Date 2012-06-15 10:22 Edited 2012-06-15 10:57
I would  be tempted to play Nxe2 and then get my queen to f3.

However, hopefully, I would realise immediately that this is totally losing after Qxd5 check! :lol::lol:
Parent - - By kgburcham (***) Date 2012-06-15 22:31
Q2B1bk1/p1p4p/6p1/3pp3/3P1n2/2N4b/P3BPrP/2R2R1K b - -

Ok I give up.
Here are results with white to move and then also with black to move.

Rybka

11.00   0:01   +22.79  1.Be7 Ne6 2.Bxf8 Kf7 3.Bh6 Rg4 4.Bxg4 Bxg4 5.Qxd5 Ke7 6.dxe5 a6 7.Qc6 g5 8.Nd5+ Kf7 9.Nf6 Kg6 10.Nxg4 Kf5 11.Rfe1 (1.371.310) 732
12.01   0:06   +28.03  1.Be7 Ne6 2.Bxf8 Kf7 3.Bh6 Rg5 4.Bxg5 Nf4 5.Bxf4 exd4 6.Qxd5+ Be6 7.Qxd4 h5 8.Bg5 Bd5+ 9.Nxd5 (5.528.996) 862
12.03   0:10    +M11   1.Nxd5 Ne6 2.Nf6+ Kg7 3.Qd5 Be7 4.Qd7 Nxd8 5.Qxe7+ Nf7 6.Ne8+ Kg8 7.Rxc7 Rg1+ 8.Rxg1 Bg2+ 9.Rxg2 h5 10.Qxf7+ Kh8 11.Qf8+ (9.199.138) 898
13.01   0:11    +M11   1.Nxd5 Ne6 2.Nf6+ Kg7 3.Qd5 Be7 4.Qd7 Nxd8 5.Qxe7+ Nf7 6.Ne8+ Kg8 7.Rxc7 Rg1+ 8.Rxg1 Bg2+ 9.Rxg2 h5 10.Qxf7+ Kh8 11.Qf8+ (10.519.001) 913
14.01   0:13    +M11   1.Nxd5 Ne6 2.Nf6+ Kg7 3.Qd5 Be7 4.Qd7 Nxd8 5.Qxe7+ Nf7 6.Ne8+ Kg8 7.Rxc7 Rg1+ 8.Rxg1 Bg2+ 9.Rxg2 h5 10.Qxf7+ Kh8 11.Qf8+ (12.351.908) 925
15.01   0:24    +M10   1.Nxd5 Ne6 2.Rxc7 Nxc7 3.Nxc7 h5 4.Qd5+ Kg7 5.Ne8+ Kh8 6.Qf7 Rxf2 7.Rxf2 Bg2+ 8.Rxg2 exd4 9.Qxf8+ Kh7 10.Nf6+ (24.861.556) 994
16.01   0:30    +M10   1.Nxd5 Ne6 2.Rxc7 Nxc7 3.Nxc7 h5 4.Qd5+ Kg7 5.Ne8+ Kh8 6.Qf7 Rxf2 7.Rxf2 Bg2+ 8.Rxg2 exd4 9.Qxf8+ Kh7 10.Nf6+ (31.145.195) 1005
17.01   0:38    +M10   1.Nxd5 Ne6 2.Rxc7 Nxc7 3.Nxc7 h5 4.Qd5+ Kg7 5.Ne8+ Kh8 6.Qf7 Rxf2 7.Rxf2 Bg2+ 8.Rxg2 exd4 9.Qxf8+ Kh7 10.Nf6+ (39.490.588) 1012
18.01   1:08    +M10   1.Nxd5 Rg4 2.Nxf4 Rxf4 3.Qd5+ Kh8 4.Bc4 Bg2+ 5.Kxg2 Rg4+ 6.Kh3 Kg7 7.Qg8+ Kh6 8.Kxg4 Be7 9.Bxe7 exd4 10.Bg5+ (68.311.680) 994
19.01   1:20    +M10   1.Nxd5 Rg4 2.Nxf4 Rxf4 3.Qd5+ Kh8 4.Bc4 Bg2+ 5.Kxg2 Rg4+ 6.Kh3 Kg7 7.Qg8+ Kh6 8.Kxg4 Be7 9.Bxe7 exd4 10.Bg5+ (79.867.213) 992
20.01   1:40    +M10   1.Nxd5 Rg4 2.Nxf4 Rxf4 3.Qd5+ Kh8 4.Bc4 Bg2+ 5.Kxg2 Rg4+ 6.Kh3 Kg7 7.Qg8+ Kh6 8.Kxg4 Be7 9.Bxe7 exd4 10.Bg5+ (101.065.826) 1003
21.01   2:18    +M10   1.Nxd5 Rg4 2.Nxf4 Rxf4 3.Qd5+ Kh8 4.Bc4 Bg2+ 5.Kxg2 Rg4+ 6.Kh3 Kg7 7.Qg8+ Kh6 8.Kxg4 Be7 9.Bxe7 exd4 10.Bg5+ (143.676.430) 1035
21.01   2:39    +M10   1.Nxd5 Rg4 2.Nxf4 Rxf4 3.Qd5+ Kh8 4.Bc4 Bg2+ 5.Kxg2 Rg4+ 6.Kh3 Kg7 7.Qg8+ Kh6 8.Kxg4 Be7 9.Bxe7 exd4 10.Bg5+ (169.168.896) 1059
best move: Nc3xd5 time: 2:40.104 min  n/s: 1.059.809  nodes: 169.168.896
10.00   0:01   +16.72  1...Ne6 2.Bf3 Rg4 3.dxe5 Rd4 4.Bxd5 c5 5.Qxa7 Bg7 6.Qxc5 Kh8 7.Bxe6 Rxd8 8.Bxh3 Bf8 9.Qc4 Re8 10.Rfe1 Ba3 (681.269) 490
11.01   0:02   +16.87  1...Ne6 2.Bf3 Rg4 3.dxe5 Rd4 4.Bxd5 c6 5.Qxc6 Rxd5 6.Qxd5 Bf5 7.Bf6 a6 8.Qa8 Nc7 9.Qb7 Ne6 10.Qxa6 Nc5 11.Qa7 Nd3 12.Rcd1 (1.304.245) 491
12.01   0:04   +16.92  1...Ne6 2.Bf3 Rg4 3.dxe5 Rd4 4.Bxd5 c6 5.Qxc6 Rxd5 6.Qxd5 Bf5 7.Bf6 a6 8.Qa8 g5 9.Qxa6 g4 10.Rfd1 Nc5 11.Qa8 Bg6 12.Nd5 Be4+ (2.066.074) 490
13.01   0:06   +17.48  1...Ne6 2.Bf3 Rg4 3.dxe5 Rd4 4.Bxd5 c6 5.Qxc6 Rxd5 6.Qxd5 Bf5 7.Bf6 a6 8.Qa8 g5 9.Qxa6 g4 10.Rfd1 Nc5 11.Qa8 h6 12.a4 Ne6 13.Nd5 Be4+ (3.318.117) 483
14.01   0:30   +19.10  1...Ne6 2.Bf3 Rg4 3.dxe5 Rd4 4.Bxd5 c5 5.Qxa7 Bg7 6.Qxc5 Rxd5 7.Qxd5 Bh6 8.Rcd1 Bf5 9.Bf6 Bf8 10.a4 Bh3 11.Rg1 Bf5 12.a5 Bc5 13.Qa8+ Nf8 14.a6 Be6 (17.542.795) 577
15.01   1:35   +20.35  1...Ne6 2.Bf3 Rg4 3.dxe5 c6 4.Bxg4 Bxg4 5.Be7 d4 6.Bxf8 Nxf8 7.Na4 Bf3+ 8.Kg1 Bg4 9.Qxa7 Bf3 10.Qxd4 h6 11.Nc5 Bd5 12.a4 Nh7 13.Ne4 g5 14.f4 g4 (56.460.777) 590
16.01   2:34   +20.35  1...Ne6 2.Bf3 Rg4 3.dxe5 c6 4.Bxg4 Bxg4 5.Be7 d4 6.Bxf8 Nxf8 7.Na4 Bf3+ 8.Kg1 Bg4 9.Qxa7 Bf3 10.Qxd4 h6 11.Nc5 Bd5 12.a4 Nh7 13.Ne4 g5 14.f4 g4 (92.296.077) 595
17.01   4:52   +21.13  1...Ne6 2.Bf3 Rg4 3.dxe5 c6 4.Bxg4 Bxg4 5.Be7 d4 6.Bxf8 Nxf8 7.Na4 Bf3+ 8.Kg1 Bg4 9.Qxa7 Bf3 10.Qxd4 Bd5 11.Nc5 h5 12.Qd3 h4 13.a4 Kf7 14.Rb1 Kg7 (183.916.409) 627
18.01  23:00    +M11   1...Ne6 2.Nxd5 h5 3.Nf6+ Kg7 4.Rxc7+ Nxc7 5.Qc6 Nd5 6.Qxd5 Be6 7.Qxe6 Kh6 8.Ng8+ Kh7 9.Qf7+ Bg7 10.Bf6 Rg1+ 11.Rxg1 exd4 12.Qxg7+ (1.183.272.032) 857
18.04  32:09    +M11   1...Ne6 2.Nxd5 h5 3.Nf6+ Kg7 4.Rxc7+ Nxc7 5.Qc6 Nd5 6.Qxd5 Be6 7.Qxe6 Kh6 8.Ng8+ Kh7 9.Qf7+ Bg7 10.Bf6 Rg1+ 11.Rxg1 exd4 12.Qxg7+ (1.761.282.048) 913
Parent - - By Banned for Life (Gold) Date 2012-06-15 23:53
It may be a little easier if you leave the black queen on a3... :lol:
Parent - By Barnard (Bronze) Date 2012-06-15 23:57
the easier things never will make us as happy as the difficult things...  :wink:
Parent - By kgburcham (***) Date 2012-06-16 02:56
whoops. lol
Parent - - By fejman (**) Date 2012-06-16 11:48
Ok  1...c6  is best 4h analysis on the boad with friends.
Parent - - By Akbarfan (***) Date 2012-06-16 14:19
Yes you're right.

Q2B1bk1/p1p4p/6p1/3pp3/3P1n2/q1N4b/P3BPrP/2R2R1K b - - 0 1


Analysis by Critter 1.6 64-bit 1T:

1. =  (0.00): 1...c6 2.dxe5 Sxe2 3.Dxc6 Sf4 4.Tcd1 Tg4 5.Tg1 Lb4 6.De8+ Lf8 7.Dc6
2. +-  (2.68): 1...Tg4 2.Lxg4 Lxg4 3.h3 Lxh3 4.Tg1 Lf5 5.dxe5 d4 6.Lxc7 De7 7.Ld8 Dd7 8.Tgd1 Lg4 9.e6 Sxe6 10.Se4
Parent - - By pawel.newyork (*) Date 2012-06-16 16:56 Edited 2012-06-16 18:19
Yes. C6 is the only move that black can play in this position. But if you play this position would you think that C6 could change anything? In fact this move protect weakness on D5 pawn but also block white queen that can't take it because next RxF2 with  big threat of mate, if white takes R on f2 back, then queen takes RC1 , and this is crucial since white can't move its knight to d1 to protect its king and e3 square( next move black queen goes to e3-position win by black!) because knight is tie with the white queen! (this is the reason why white couldn't take this C6 pawn!) . As for me position was very interesting because of this C6 move that at first glance looked completely meaningless. I'm curious if a strong chessplayer could find this continuation playing a live game. Thanks everybody for yours posts!
Parent - By Labyrinth (*****) Date 2012-06-16 23:11
I agree with you. It's one of those moves that looks pointless, but turns out to be the only move.

How to find such moves over the board is beyond me :-/
Parent - By Dennis Breder (***) Date 2012-06-17 14:37 Edited 2012-06-17 14:39
First I thought about Rxf2, but this simply does not win. Then I thought about Qxc1 and felt proud :grin:. But soon I realized that Be7 is possible then :cry:
Then I saw the move c6 in one of the posts and stopped calculating. (total calculation time: 30s)
Up Topic The Rybka Lounge / Computer Chess / Brilliant move

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