Chess is a Lovely Game Where Two Great Brains Meet...

[swami]

...One out wits the other by a move so neat.



[d] rn2kb1r/1bqn1ppp/p3p3/Pp2P3/8/1NNBB3/1P4PP/R2Q1RK1 w kq - 0 13

Rxf7!!

What's the time taken?

[swami]

As for the title, It's just to show an appreciation for a friend of mine who wrote this poem when he was about 14 years old despite the fact that english was his third language.

Code: Select all

Chess is a lovely game where two great brains meet.
One out wits the other by a move so neat.
King, queen, soldiers, bishops and knights,
Together they all fight,
Asking for their own right.
Winning is their motive,
Yet they are very sportive.
They chalk out a series of plans,
To see their opponent knocked off the stand.
They battle on for hours,
Each move calculated with brain power.
The one who has determination and skill,
Will certainly move in for the kill.
The one who keeps his cool till the battle is over,
Becomes the winner and is considered very clever.

Rxf7 is a beautiful sacrifice I've ever seen. It just reminded me of this poem. Looking at the nature of the position, the poem rings so true!

[David Dahlem]

Naum 4.2:

14/41 00:36 36.752.504 1.043.541 -0.37 Rf1xf7
14/48 00:40 41.993.297 1.060.597 +0.11 Rf1xf7 Ke8xf7 Qd1h5+ Kf7g8 Ra1f1 g7g6 Bd3xg6 Nd7xe5 Nc3e4 Bb7xe4 Bg6xe4 Nb8c6 Nb3d4 Nc6xd4
15/49 00:46 49.426.245 1.093.404 +0.12 Rf1xf7 Ke8xf7 Qd1h5+ Kf7g8 Ra1f1 g7g6 Bd3xg6 Nd7xe5 Nc3e4 Bb7xe4 Bg6xe4 Nb8c6 Nb3d4 Nc6xd4 Be3xd4
16/55 01:03 72.749.422 1.159.630 +0.20 Rf1xf7 Ke8xf7 Qd1h5+ Kf7g8 Ra1f1 g7g6 Bd3xg6 Nd7xe5 Nc3e4 Bb7xe4 Bg6xe4 Nb8c6 Nb3d4 Nc6xd4 Be3xd4 Bf8c5

[zullil]

...One out wits the other by a move so neat.



[d] rn2kb1r/1bqn1ppp/p3p3/Pp2P3/8/1NNBB3/1P4PP/R2Q1RK1 w kq - 0 13

Rxf7!!

What's the time taken?

About 20 seconds for Stockfish-1.6.3 (8 threads):

Code: Select all

Searching: rn2kb1r/1bqn1ppp/p3p3/Pp2P3/8/1NNBB3/1P4PP/R2Q1RK1 w kq -
infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0
 2     +0.65   00:01      328 Be4 Nxe5 
 3     +1.01   00:01     1106 Be4 Nc6 Bg5 Ncxe5 
 4     +1.01   00:01     2048 Be4 Nc6 Bg5 Ncxe5 
 5     +0.32   00:01     5615 Be4 b4 Bxb7 Qxb7 Ne2 Nxe5 
 5     +0.69   00:01    11030 Ne4 h6 Bd4 Nxe5 Nbc5 
 6     +0.73   00:01    19010 Ne4 Nc6 Qh5 g6 Qh4 Ncxe5 
 7  <  +0.32   00:01    35355 Ne4 Nc6 Nd6+ Bxd6 exd6 Qxd6 Bg6 Qxd1 Bxf7+ Ke7 
                              Raxd1 e5 
 8     -0.04   00:01    92092 Ne4 Nxe5 Bc2 Nc4 Bf4 Qd8 Qxd8+ Kxd8 Nbc5 
 8     +0.48   00:01   134724 Be4 b4 Bxb7 Qxb7 Na4 Nc6 Nb6 Nxb6 axb6 Nxe5 
 9     -0.28   00:01   557441 Be4 Nc6 Rf2 Ncxe5 Rc1 Nc4 Bxb7 Qxb7 Bg5 Nf6 
 9     -0.08   00:01   585183 Ne4 Nxe5 Rc1 Nbc6 Bb6 Qd7 Nec5 Bxc5+ Nxc5 Qd4+ 
                              Rf2 Nxd3 Nxd3 
10     -0.44   00:01    1174k Ne4 Nxe5 Bb6 Qd7 Nec5 Bxc5+ Nxc5 Qd4+ Rf2 Nxd3 
                              Nxd3 Qd5 Ne5 Qxd1+ Rxd1 O-O 
10     -0.36   00:01    1480k Qh5 g6 Qh4 Nc6 Rad1 Ncxe5 Be4 Be7 Qh6 f5 
11     +0.08   00:02    4063k Qh5 g6 Qh3 Be7 Qh6 Nc6 Qg7 Rf8 Be4 Qxe5 Qxh7 Nf6 
12     +0.20   00:03    8778k Qh5 g6 Qh3 Be7 Ne4 Nxe5 Bb6 Qd7 Nec5 Qd5 Rad1 O-O 
                              Be4 Bxc5+ Nxc5 
13     -0.12   00:03   12955k Qh5 g6 Qh3 Be7 Rac1 Nc6 Qh6 Ndxe5 Bb6 Bf8 Qf4 Qe7 
                              Be4 f5 Nc5 Kf7 b4 Kg8 Nxb7 g5 Nd5 gxf4 Nxe7+ Nxe7 
14     -0.65   00:07   38131k Qh5 g6 Qh3 Nxe5 Bb6 Qc8 Be4 f5 Nd4 Nbd7 Rae1 Bxe4 
                              Nxe4 Be7 Nd2 Bc5 Qe3 Bd6 
14     +0.32   00:08   41080k Be4 Nc6 Rc1 Be7 Qh5 g6 Qh6 O-O-O Kh1 Rdf8 Nxb5 
                              axb5 a6 Ba8 Nd4 
15     +0.12   00:10   58340k Be4 Nc6 Rc1 Be7 Qh5 g6 Qh6 Qxe5 Bxc6 Bxc6 Bd4 Bc5 
                              Nxb5 Bxd4+ N5xd4 Be4 Rc3 f5 Nc6 Bxc6 Rxc6 Kd8 
16     +0.00   00:13   74222k Be4 Nc6 Rc1 Be7 Qh5 g6 Qh6 Qxe5 Rce1 Bf8 Qh4 Be7 
                              Qh6 
16  >  +0.97   00:19  115860k Rxf7 g6 Rf1 Nxe5 Bb6 
17     +1.82   00:43  299825k Rxf7 Kxf7 Qh5+ g6 Bxg6+ hxg6 Qxh8 Qxe5 Rf1+ Ke7 
                              Bc5+ Kd8 Rxf8+ Kc7 Bb6+ Kd6 Qh7 Bd5 Bd4 Qh5 Qg7 
                              Bxb3 Rh8 Qg4 Rc8 Nc6 
18     +0.97   00:52  361153k Rxf7 Kxf7 Qh5+ Kg8 Rf1 g6 Bxg6 Nxe5 Ne4 Bxe4 Bxe4 
                              Nbc6 Nd4 Qe7 Nxc6 Nxc6 Bxc6 Rc8 Bb7 Rc2 Qf3 Qg7 
                              Bxa6 Rxb2 
19     +1.94   01:10  490137k Rxf7 Kxf7 Qh5+ Kg8 Rf1 g6 Qg4 Nxe5 Qxe6+ Nf7 Be4 
                              Qd7 Qxd7 Nxd7 Bxb7 Re8 Bd5 Ne5 Bd4 Re7 Bxf7+ Nxf7 
                              Nd5 Re5 Bxe5 Nxe5 Rf6 Nd3 Rxa6 Bg7 Ra8+ Kf7 Rxh8 
                              Bxh8 Nc3 
20     +2.06   01:40  721548k Rxf7 Kxf7 Qh5+ Kg8 Rf1 g6 Qg4 Nxe5 Qxe6+ Nf7 Be4 
                              Qd7 Qxd7 Nxd7 Bxb7 Re8 Bd5 Ne5 Bd4 Re7 Bxf7+ Nxf7 
                              Nd5 Re5 Bxe5 Nxe5 Rf6 Kg7 Rxa6 Nc4 Re6 Nxb2 Rb6 
                              Kf7 Rb7+ Ke6 Nc7+ Kf7 Rxb5 
21     +1.98   01:59  864279k Rxf7 Kxf7 Qh5+ Kg8 Rf1 g6 Qg4 Nxe5 Qxe6+ Nf7 Be4 
                              Nc6 Nd5 Nd8 Nf6+ Kg7 Bh6+ Kxh6 Qh3+ Kg7 Ne8+ Kg8 
                              Nxc7 Bxe4 Nxa8 Bxa8 Qe3 Bb7 Nc5 Bc8 Ne4 Bg7 Nf6+ 
                              Bxf6 Rxf6 Bb7 Qb6 Kg7 Qd4 Kg8 Qd7 
Nodes: 952265077
Nodes/second: 7220036
Best move: Rxf7
Ponder move: Kxf7

[swami]

Naum 4.2:

14/41 00:36 36.752.504 1.043.541 -0.37 Rf1xf7
14/48 00:40 41.993.297 1.060.597 +0.11 Rf1xf7 Ke8xf7 Qd1h5+ Kf7g8 Ra1f1 g7g6 Bd3xg6 Nd7xe5 Nc3e4 Bb7xe4 Bg6xe4 Nb8c6 Nb3d4 Nc6xd4
15/49 00:46 49.426.245 1.093.404 +0.12 Rf1xf7 Ke8xf7 Qd1h5+ Kf7g8 Ra1f1 g7g6 Bd3xg6 Nd7xe5 Nc3e4 Bb7xe4 Bg6xe4 Nb8c6 Nb3d4 Nc6xd4 Be3xd4
16/55 01:03 72.749.422 1.159.630 +0.20 Rf1xf7 Ke8xf7 Qd1h5+ Kf7g8 Ra1f1 g7g6 Bd3xg6 Nd7xe5 Nc3e4 Bb7xe4 Bg6xe4 Nb8c6 Nb3d4 Nc6xd4 Be3xd4 Bf8c5

Qg4 is actually much better move than Bxg6 in variation.

0.20 doesn't indicate a clear advantage. I believe the evaluations will go up once it finds Qg4.

[David Dahlem]

Naum 4.2:

14/41 00:36 36.752.504 1.043.541 -0.37 Rf1xf7
14/48 00:40 41.993.297 1.060.597 +0.11 Rf1xf7 Ke8xf7 Qd1h5+ Kf7g8 Ra1f1 g7g6 Bd3xg6 Nd7xe5 Nc3e4 Bb7xe4 Bg6xe4 Nb8c6 Nb3d4 Nc6xd4
15/49 00:46 49.426.245 1.093.404 +0.12 Rf1xf7 Ke8xf7 Qd1h5+ Kf7g8 Ra1f1 g7g6 Bd3xg6 Nd7xe5 Nc3e4 Bb7xe4 Bg6xe4 Nb8c6 Nb3d4 Nc6xd4 Be3xd4
16/55 01:03 72.749.422 1.159.630 +0.20 Rf1xf7 Ke8xf7 Qd1h5+ Kf7g8 Ra1f1 g7g6 Bd3xg6 Nd7xe5 Nc3e4 Bb7xe4 Bg6xe4 Nb8c6 Nb3d4 Nc6xd4 Be3xd4 Bf8c5

Qg4 is actually much better move than Bxg6 in variation.

0.20 doesn't indicate a clear advantage. I believe the evaluations will go up once it finds Qg4.

Yes, i could have let it analyze longer, but you asked for time taken to find Rxf7.

[swami]

Yes, i could have let it analyze longer, but you asked for time taken to find Rxf7.

Yep, you're right.. I should have been more precise.

[mariaclara]

took me 5 or so secs. (no engine)

didn't calculate all variations.

just a hunch.

there wasn't any other apparent Sac.

Yes, i could have let it analyze longer, but you asked for time taken to find Rxf7.

Yep, you're right.. I should have been more precise.

[swami]

Solving the first move is ofcourse easier but you will have to calculate several moves ahead including side variations to justify that this sacrifice is beneficial, which is what makes this problem little harder.

took me 5 or so secs. (no engine)

didn't calculate all variations.

just a hunch.

there wasn't any other apparent Sac.

Yes, i could have let it analyze longer, but you asked for time taken to find Rxf7.

Yep, you're right.. I should have been more precise.

[mariaclara]

In a way, I was replying to Dahlem's using an engine.

afterall, your topic's about "2 Great Brains".

as I understand that, it's 2 human brains.

not chess engines...

------------------------------------------------------------------------

I wasn't concerned about the variations. but confirming

" Re: Chess is a Lovely Game Where Two Great Brains Meet... "

Solving the first move is ofcourse easier but you will have to calculate several moves ahead including side variations to justify that this sacrifice is beneficial, which is what makes this problem little harder.

took me 5 or so secs. (no engine)

didn't calculate all variations.

just a hunch.

there wasn't any other apparent Sac.

Yes, i could have let it analyze longer, but you asked for time taken to find Rxf7.

Yep, you're right.. I should have been more precise.