New Vitruvius?

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FriedmannC
Posts: 273
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New Vitruvius?

Post by FriedmannC » Sat Dec 07, 2013 8:34 pm

I came across this video, it seems some new thinking algorithms are being implemented in the next Vitruvius http://www.youtube.com/watch?v=6Q6_m6HlD78. Best regards!

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reflectionofpower
Posts: 1455
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Location: USA

Re: New Vitruvius?

Post by reflectionofpower » Sat Dec 07, 2013 9:00 pm

FriedmannC wrote:I came across this video, it seems some new thinking algorithms are being implemented in the next Vitruvius http://www.youtube.com/watch?v=6Q6_m6HlD78. Best regards!
No speak Italianish
"hodie mihi, cras tibi"

Lonnie

noctiferus
Posts: 364
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Re: New Vitruvius?

Post by noctiferus » Sun Dec 08, 2013 9:53 am

Briefly, what I understood:
Somebody from Vitruvius group wrote to "Istruttore scacchi", saying that they were improving Vitruvius' tactics, on the basis of the theory explained in the book by GM Shashin.
In the book, Shashin says that there are three basic tactical methods:Tal, Petrosian, Capablanca: he suggests to define also "mixed methods", such as Tal-Capablanca , and so on, in order to improve the tactical engines capability.
As an example, he shows this position

Fedorov Kobalia 1998
[D] r1r3k1/1bq1bppp/p1npp3/2nB1NP1/1p2P3/2N1B1R1/PPP1QP1P/2KR4 w - - 0 17

where 17.Nxg7 cannot be found as the best, by any engine, he says.

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Laskos
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Full name: Kai Laskos

Re: New Vitruvius?

Post by Laskos » Sun Dec 08, 2013 10:08 am

noctiferus wrote:Briefly, what I understood:
Somebody from Vitruvius group wrote to "Istruttore scacchi", saying that they were improving Vitruvius' tactics, on the basis of the theory explained in the book by GM Shashin.
In the book, Shashin says that there are three basic tactical methods:Tal, Petrosian, Capablanca: he suggests to define also "mixed methods", such as Tal-Capablanca , and so on, in order to improve the tactical engines capability.
As an example, he shows this position

Fedorov Kobalia 1998
[D] r1r3k1/1bq1bppp/p1npp3/2nB1NP1/1p2P3/2N1B1R1/PPP1QP1P/2KR4 w - - 0 17

where 17.Nxg7 cannot be found as the best, by any engine, he says.
Yes, Tal, Petrosian, Capablanca, Morphy, Fischer, whatever, basically an IvanHoe clone, and a closed source one.

noctiferus
Posts: 364
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Location: Italy

Re: New Vitruvius?

Post by noctiferus » Sun Dec 08, 2013 10:16 am

Hi, Kai.
No, it was not a Vitruvius team idea...
I was only summarizing Shashin's suggestions for improving engines' tactical abilities. He mentions only these three basic types of tactical approach, and the mixing up of some of these to overcome the difficulties of some positions.

jpqy
Posts: 515
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Re: New Vitruvius?

Post by jpqy » Sun Dec 08, 2013 11:39 am

FEN: r1r3k1/1bq1bppp/p1npp3/2nB1NP1/1p2P3/2N1B1R1/PPP1QP1P/2KR4 w - - 0 17

Stockfish RTB+LP:
1/2 00:00 627 627,000 -0.72 Nf5xe7+ Qc7xe7
2/3 00:00 1,370 1,370,000 -0.84 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Bd5xc6 Bb7xc6
3/4 00:00 1,995 1,995,000 -0.84 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Bd5xc6 Bb7xc6
4/5 00:00 3,768 3,768,000 -0.84 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5
5/6 00:00 6,094 6,094,000 -0.84 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5
6/7 00:00 10,500 954,545 -1.33 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1
7/8 00:00 14,290 1,299,090 -1.39 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Bc6-b5
8/9 00:00 21,037 1,912,454 -1.19 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Bc6-b5 Qe2-f3
9/13 00:00 31,477 1,498,904 -1.19 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Bc6-b5 Qe2-f3 Rc8-d8 Rd1xd8+ Ra8xd8 Nb1-d2
10/15 00:00 55,282 1,783,290 -1.11 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Rc8-d8 h2-h4 Bc6-b5 Qe2-f3 e6-e5 Rd1xd8+ Ra8xd8 Nb1-d2
11/18 00:00 127,763 2,094,475 -1.11 Bd5xc6 b4xc3 Bc6xb7 c3xb2+ Kc1-b1 Qc7xb7 Nf5xe7+ Qb7xe7 Be3xc5 Rc8xc5 h2-h4 Ra8-c8 Rg3-b3 h7-h6 g5xh6 Rc5xc2 Qe2xc2 Rc8xc2 Kb1xc2
12/18 00:00 172,514 2,429,774 -1.11 Bd5xc6 b4xc3 Bc6xb7 c3xb2+ Kc1-b1 Qc7xb7 Nf5xe7+ Qb7xe7 Be3xc5 Rc8xc5 h2-h4 Ra8-c8 Rg3-b3 h7-h6 g5xh6 Rc5xc2 Qe2xc2 Rc8xc2 Kb1xc2
13/18 00:00 333,525 3,004,729 -1.11 Bd5xc6 b4xc3 Bc6xb7 c3xb2+ Kc1-b1 Qc7xb7 Nf5xe7+ Qb7xe7 Be3xc5 Rc8xc5 h2-h4 Ra8-c8 Rg3-b3 h7-h6 g5xh6 Rc5xc2 Qe2xc2 Rc8xc2 Kb1xc2
14/21 00:00 747,212 3,717,472 -1.03 Bd5xc6 b4xc3 Bc6xb7 c3xb2+ Kc1-b1 Qc7xb7 Nf5xe7+ Qb7xe7 Be3xc5 Rc8xc5 h2-h4 f7-f6 Qe2-d2 d6-d5 g5xf6 Qe7xf6 Qd2-g5 Qf6xg5 h4xg5
15/23 00:00 1,110,373 3,789,668 -1.11 Bd5xc6 b4xc3 Bc6xb7 c3xb2+ Kc1-b1 Qc7xb7 Nf5xe7+ Qb7xe7 Be3xc5 Rc8xc5 h2-h4 Ra8-c8 Rg3-b3 h7-h6 g5xh6 Rc5xc2 Qe2xc2 Rc8xc2 Kb1xc2 Qe7xh4 Rb3-b8+ Kg8-h7 h6xg7 Kh7xg7 Rd1xd6 Qh4xf2+
16/24 00:00 1,887,184 3,736,998 -1.31 Bd5xc6 b4xc3 Bc6xb7 c3xb2+ Kc1-b1 Qc7xb7 Nf5xe7+ Qb7xe7 Be3xc5 Rc8xc5 h2-h4 Ra8-c8 Rg3-b3 h7-h6 g5xh6 Qe7xh4 Rb3xb2 Qh4xh6 Rd1xd6 Qh6-h2 Rd6-d1 Qh2-h4
17/28 00:00 3,023,937 3,808,484 -1.31 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Rc8-d8 h2-h4 Bc6-b5 Rd1xd8+ Ra8xd8 Qe2-e3 Qe7-d6 Nb1-d2 a6-a5 f2-f4 Qd6-d7 h4-h5
18/31 00:01 5,695,335 4,221,893 -1.33 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Rc8-d8 h2-h4 Bc6-b5 Qe2-e3 Rd8xd1+ Kc1xd1 Ra8-d8+ Kd1-c1 c5-c4 h4-h5 b4-b3 a2xb3 c4xb3 Nb1-c3 b3xc2 Nc3xb5 a6xb5 Kc1xc2
19/31 00:01 8,515,836 4,367,095 -1.19 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 c5-c4 Rd1-d4 Bc6-b5 c2-c3 e6-e5 Rd4-d5 Bb5-c6 Rd5-d2 Qe7-b7 c3xb4 Bc6xe4 Nb1-c3 Be4-d3 Qe2xe5 Qb7xb4
20/31 00:02 12,611,464 4,551,232 -1.25 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 c5-c4 h2-h4 Bc6-a4 h4-h5 c4-c3 b2-b3 Ba4-c6 h5-h6 Rc8-d8 h6xg7 Kg8xg7 Qe2-f3 Kg7-g8 Rd1-d3 e6-e5
21/31- 00:03 15,873,760 4,602,423 -1.33 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 c5-c4 h2-h4 Qe7-b7 Nb1-d2 Bc6-b5 Qe2-e1 a6-a5 Rg3-h3 c4-c3 b2xc3 b4xc3 Nd2-b3 a5-a4
21/31+ 00:03 16,519,183 4,613,008 -1.17 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 c5-c4 Rd1-d4 Bc6-b5 c2-c3 Rc8-d8 Rd4xd8+ Ra8xd8 c3xb4 c4-c3 Qe2-e1 c3xb2+ Kc1xb2 a6-a5 b4xa5 Bb5-d3 Nb1-c3
21/31 00:04 20,245,889 4,653,157 -1.11 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 c5-c4 Rd1-d4 Bc6-b5 c2-c3 e6-e5 Rd4-d5 Bb5-c6 Rd5-d2 Qe7-b7 c3xb4 Bc6xe4 Nb1-c3 Be4-d3 Qe2xe5 Rc8-d8 Qe5-a5 Qb7-h1+ Rd2-d1 Qh1xh2
22/32- 00:05 27,072,205 4,573,780 -1.19 Bd5xc6 b4xc3 Nf5xe7+ Qc7xe7 Be3xc5 c3xb2+ Kc1xb2 Rc8xc6 Bc5-d4 Ra8-c8 Rg3-b3 Rc6xc2+ Qe2xc2 Rc8xc2+ Kb2xc2 e6-e5 Bd4-b6 Bb7xe4+ Kc2-b2 Qe7xg5 Rd1xd6 f7-f5 Rd6-d8+ Kg8-f7
22/32+ 00:06 27,845,206 4,573,034 -1.03 Bd5xc6 b4xc3 Nf5xe7+ Qc7xe7 Be3xc5 c3xb2+ Kc1-b1 Rc8xc6 Bc5-a3 Ra8-c8 e4-e5 Rc6xc2 Qe2xc2 Rc8xc2 Kb1xc2 Qe7-c7+ Kc2xb2 d6xe5 Rg3-c3 Bb7-c6 Rd1-c1 Qc7-b7+ Kb2-a1
22/35 00:06 29,694,802 4,566,323 -1.13 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 c5-c4 Rd1-d4 Bc6-b5 c2-c3 e6-e5 Rd4-d5 Ra8-b8 a2-a3 Bb5-c6 c3xb4 Bc6xd5 e4xd5 Rc8-d8 Nb1-c3 Qe7-c7 h2-h4 Rb8-b7 Kc1-b1
23/35+ 00:07 32,686,384 4,595,302 -1.05 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 c5-c4 Rd1-d4 Bc6-b5 c2-c3 e6-e5 Rd4-d5 Ra8-b8 a2-a3 Bb5-c6 c3xb4 Bc6xd5 e4xd5 Rc8-d8 Nb1-c3 Qe7-c7 h2-h4 Rb8-b7 Kc1-b1
23/35- 00:08 39,958,295 4,664,210 -1.21 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Rc8-d8 Rd1xd8+ Ra8xd8 h2-h4
23/37 00:09 42,592,503 4,669,206 -1.17 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Rc8-d8 Rd1xd8+ Ra8xd8 h2-h4 Bc6-b5 Qe2-e3 Qe7-d6 Nb1-d2 a6-a5 Rg3-g1 a5-a4 Nd2-f3 c5-c4 Qe3-d2 Qd6-c7 Qd2xb4 Qc7-f4+ Nf3-d2 c4-c3 Qb4xc3 Qf4xf2 Rg1-d1 Qf2xh4 Qc3-c5 Bb5-e2 Qc5-e7
24/37+ 00:09 45,567,900 4,684,681 -1.09 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Rc8-d8 Rd1xd8+ Ra8xd8 h2-h4 Bc6-b5 Qe2-e3 Qe7-d6 Rg3-g1 a6-a5 Qe3-d2 Qd6-c7 Qd2-e3 c5-c4 Rg1-d1 Rd8xd1+ Kc1xd1 Qc7-h2 Qe3-g3 Qh2-h1+ Kd1-d2 c4-c3+ b2xc3
24/37 00:10 50,920,316 4,705,694 -1.09 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Rc8-d8 Rd1xd8+ Ra8xd8 h2-h4 Bc6-b5 Qe2-e3 Qe7-d6 Rg3-g1 c5-c4 Qe3-f3 Bb5-c6 Rg1-d1 Qd6xd1+ Qf3xd1 Rd8xd1+ Kc1xd1 Bc6xe4 Nb1-d2 Be4-d5 c2-c3 a6-a5 Kd1-e2 h7-h6 Ke2-e3 h6xg5 h4xg5
25/37 00:13 61,485,491 4,721,300 -1.09 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Rc8-d8 Rd1xd8+ Ra8xd8 h2-h4 Bc6-b5 Qe2-e3 Qe7-d6 Rg3-g1 c5-c4 Qe3-f3 Bb5-c6 Rg1-d1 Qd6xd1+ Qf3xd1 Rd8xd1+ Kc1xd1 Bc6xe4 Nb1-d2 Be4-d5 c2-c3 a6-a5 Kd1-e2 h7-h6 Ke2-e3 h6xg5 h4xg5
26/37- 00:17 82,675,958 4,785,873 -1.17 Bd5xc6 Bb7xc6 Nf5xe7+ Qc7xe7 Be3xc5 d6xc5 Nc3-b1 Rc8-d8 Rd1xd8+ Ra8xd8 h2-h4 Bc6-b5 Qe2-e3 Qe7-d6 Rg3-g1 c5-c4 Qe3-f3 Bb5-c6 Rg1-d1 Qd6xd1+ Qf3xd1 Rd8xd1+ Kc1xd1 Bc6xe4 Nb1-d2
26/37+ 00:31 153,657,597 4,829,569 -1.01 Nf5xg7
26/37+ 00:49 221,950,283 4,520,832 -0.88 Nf5xg7 b4xc3 Qe2-h5 Be7-f8 Ng7-f5 e6xf5 Rg3-h3 Bf8-g7 Qh5xh7+ Kg8-f8 e4xf5 Nc5-d3+ Kc1-b1 Nd3xb2 f5-f6
26/37+ 00:59 260,354,733 4,393,950 -0.70 Nf5xg7 b4xc3 Qe2-h5 Be7-f8 Ng7-f5 e6xf5 Rg3-h3 Bf8-g7 Qh5xh7+ Kg8-f8 e4xf5 Nc5-d3+ Kc1-b1 Nd3xb2
26/37+ 01:07 291,105,829 4,317,155 -0.43 Nf5xg7 b4xc3 Qe2-h5 Be7-f8 Ng7-f5 e6xf5 Rg3-h3 Bf8-g7 Qh5xh7+ Kg8-f8 e4xf5 c3xb2+ Kc1-b1 Nc6-e7 f5-f6 Bb7xd5 f6xg7+ Kf8-e8 Rd1xd5 Nc5-e6 g7-g8R+ Ne7xg8 Qh7xg8+ Ke8-e7 Qg8-h7
26/40+ 01:19 335,796,093 4,243,332 -0.02 Nf5xg7
26/43 01:44 429,062,388 4,099,034 -0.88 Nf5xg7 Kg8xg7 Qe2-h5 Rc8-g8 Bd5xe6 Nc5xe6 Nc3-d5 Qc7-d8 f2-f4 Kg7-h8 Qh5xf7 Ne6xf4 Qf7xf4 Nc6-e5 g5-g6 Bb7xd5 Rd1xd5 Qd8-f8 g6xh7 Rg8-g7 Qf4xf8+ Ra8xf8 Rg3xg7 Kh8xg7 Be3-d4 Kg7xh7 Bd4xe5
27/43 01:55 472,298,182 4,078,356 -0.88 Nf5xg7 Kg8xg7 Qe2-h5 Rc8-g8 Bd5xe6 Nc5xe6 Nc3-d5 Qc7-d8 f2-f4 Kg7-h8 Qh5xf7 Ne6xf4 Qf7xf4 Nc6-e5 g5-g6 Bb7xd5 Rd1xd5 Qd8-f8 g6xh7 Rg8-g7 Qf4xf8+ Ra8xf8 Rg3xg7 Kh8xg7 Be3-d4 Kg7xh7 Bd4xe5
28/43- 02:25 588,185,267 4,051,420 -0.96 Nf5xg7 Kg8xg7 Qe2-h5 Rc8-g8 Bd5xe6 Nc5xe6 Nc3-d5 Qc7-d8 f2-f4 Kg7-h8 Qh5xf7 Ne6xf4 Qf7xf4 Nc6-e5 g5-g6 Bb7xd5 Rd1xd5 Qd8-f8 g6xh7 Rg8-g7 Qf4xf8+ Ra8xf8 Rg3xg7 Kh8xg7 Be3-d4 Kg7xh7
28/43- 02:37 637,840,597 4,039,829 -1.05 Nf5xg7 Kg8xg7 Qe2-h5 Rc8-g8 Bd5xe6 Nc5xe6 Nc3-d5 Qc7-a5 Nd5-f6 Ne6-f8 Nf6-d5 Qa5-d8 Be3-b6 Qd8-d7 Nd5xb4 Nf8-e6 Nb4xc6 Qd7xc6 Bb6-e3 Kg7-f8
28/43- 02:52 693,057,532 4,025,752 -1.17 Nf5xg7 Kg8xg7 Qe2-h5 Rc8-g8 Bd5xe6 Nc5xe6 Nc3-d5 Qc7-a5 Nd5-f6 Ne6-f8 Nf6-d5 Qa5-d8 g5-g6

28/45 03:54 937,870,474 4,005,648 -0.96 Bd5xc6 Bb7xc6 Be3xc5 d6xc5 Nf5xe7+ Qc7xe7 Nc3-b1 Rc8-d8 Nb1-d2 Rd8-d4 f2-f4 Ra8-d8
29/45- 04:13 1,016,876,554 4,005,090 -1.05 Bd5xc6 Bb7xc6 Be3xc5 d6xc5 Nf5xe7+ Qc7xe7 Nc3-b1
29/45- 04:33 1,091,487,581 3,996,498 -1.13 Bd5xc6 Bb7xc6 Be3xc5 d6xc5 Nf5xe7+ Qc7xe7 Nc3-b1 Rc8-d8 Rd1xd8+
29/47 05:36 1,351,824,418 4,017,905 -0.94 Be3xc5 d6xc5 Nf5xe7+ Qc7xe7 Bd5xc6
30/47- 06:12 1,490,173,405 3,996,560 -1.03 Be3xc5 d6xc5 Nf5xe7+ Qc7xe7 Bd5xc6 Bb7xc6 Nc3-b1 c5-c4 Qe2xc4 Bc6-a4 Qc4-d3
30/47- 06:57 1,660,563,312 3,974,132 -1.11 Be3xc5 d6xc5 Nf5xe7+ Qc7xe7 Bd5xc6 Bb7xc6 Nc3-b1 c5-c4 Nb1-d2 c4-c3 b2xc3 b4xc3 Rg3xc3 Qe7xg5 Qe2-e3 Qg5-f6 e4-e5 Qf6-h4
30/47 07:27 1,777,835,489 3,976,130 -1.07 Be3xc5 d6xc5 Nf5xe7+ Nc6xe7 Bd5xb7 Qc7xb7 Nc3-a4 c5-c4 b2-b3 Ne7-g6 Na4-b2 c4xb3 a2xb3 Ng6-f4 Qe2-f3 Qb7-c7 Rd1-d2 a6-a5 h2-h4 Rc8-d8 Rd2xd8+ Ra8xd8 Kc1-b1 e6-e5 h4-h5 Nf4-e6
31/47+ 07:42 1,833,604,202 3,968,573 -0.98 Be3xc5 d6xc5 Nf5xe7+ Nc6xe7
31/47+ 07:54 1,883,382,889 3,969,788 -0.90 Be3xc5 b4xc3 Nf5xe7+ Qc7xe7 Bd5xc6 Rc8xc6 Bc5-a3 c3xb2+ Kc1-b1 Ra8-c8 e4-e5 Rc6xc2 Qe2xc2 Rc8xc2 Kb1xc2 Bb7-d5 e5xd6 Qe7-b7 Ba3xb2 Qb7-b5 Rg3-c3 Bd5-e4+ Kc2-c1 Qb5xg5+ Rc3-e3 Qg5-c5+
31/47- 10:10 2,391,246,054 3,916,403 -1.15 Be3xc5 d6xc5 Nf5xe7+ Qc7xe7 Bd5xc6 Bb7xc6 Nc3-b1 c5-c4 Nb1-d2 c4-c3 b2xc3 b4xc3 Rg3xc3 Qe7xg5 Qe2-e3 Qg5-h5
31/47 10:46 2,518,543,055 3,893,755 -0.94 Be3xc5 d6xc5 Nf5xe7+ Qc7xe7 Bd5xc6 Bb7xc6 Nc3-b1 c5-c4 Rd1-d4 Bc6-b5 c2-c3 e6-e5 Rd4-d5 Bb5-c6 Rd5-d2 a6-a5 Qe2xc4 b4xc3 Nb1xc3 Qe7-b4
32/47+ 14:49 3,373,779,105 3,794,689 -0.86 Rg3-h3 g7-g6 Nf5-h6+ Kg8-g7 Bd5xc6
32/47+ 15:42 3,564,577,155 3,780,480 -0.78 Rg3-h3
32/47+ 18:17 4,109,117,509 3,742,989 -0.66 Rg3-h3 g7-g6 Nf5-h6+ Kg8-g7 Bd5xc6 Bb7xc6 Qe2-f3 Bc6-e8 Nh6-f5+ e6xf5 Be3-d4+ Kg7-g8 Nc3-d5 Be7xg5+
32/47+ 19:33 4,385,756,327 3,737,208 -0.48 Rg3-h3 g7-g6 Nf5-h6+ Kg8-g7 Bd5xc6
32/47+ 21:18 4,744,399,152 3,710,643 -0.21 Rg3-h3 g7-g6 Nf5-h6+ Kg8-g7 Bd5xc6 b4xc3 Bc6xb7 c3xb2+ Kc1-b1
32/49 23:11 5,113,718,335 3,675,345 -0.34 Rg3-h3 g7-g6 Nf5-h6+ Kg8-g7 Bd5xc6 b4xc3 Bc6xb7 Qc7xb7 b2-b3 Nc5xe4 Qe2-f3 Rc8-f8 Qf3-g4 Ra8-c8 Qg4-h4 Rf8-h8 f2-f3 Ne4-d2 Qh4-f4 Rh8-f8 Qf4-h4 Kg7-h8 Be3xd2 c3xd2+ Kc1-b1 Qb7-a7 Nh6-f5 h7-h5 Nf5xe7 Qa7xe7 Qh4-d4+ Kh8-g8 f3-f4 d6-d5 Rd1xd2
33/51+ 25:55 5,707,098,238 3,667,855 -0.26 Rg3-h3 g7-g6 Nf5-h6+ Kg8-g7 Bd5xc6 b4xc3 Bc6xb7 Qc7xb7
33/51+ 28:12 6,197,607,802 3,661,190 -0.18 Rg3-h3
33/51+ 31:24 6,867,600,001 3,644,168 -0.06 Rg3-h3 g7-g6 Nf5-h6+ Kg8-g7 Bd5xc6 Bb7xc6 Qe2-f3 Bc6-e8 Nh6-f5+ e6xf5 Be3-d4+ Kg7-g8 Nc3-d5
33/51 36:12 7,837,302,473 3,608,062 0.00 Rg3-h3 g7-g6 Nf5-h6+ Kg8-g7 Bd5xc6 Bb7xc6 Qe2-f3 Bc6-e8 Nh6-f5+ Kg7-g8 Nf5-h6+ Kg8-g7

Robert Flesher
Posts: 1210
Joined: Tue Aug 18, 2009 1:06 am

Re: New Vitruvius?

Post by Robert Flesher » Sun Dec 08, 2013 2:00 pm

noctiferus wrote:Briefly, what I understood:
Somebody from Vitruvius group wrote to "Istruttore scacchi", saying that they were improving Vitruvius' tactics, on the basis of the theory explained in the book by GM Shashin.
In the book, Shashin says that there are three basic tactical methods:Tal, Petrosian, Capablanca: he suggests to define also "mixed methods", such as Tal-Capablanca , and so on, in order to improve the tactical engines capability.
As an example, he shows this position

Fedorov Kobalia 1998
[D] r1r3k1/1bq1bppp/p1npp3/2nB1NP1/1p2P3/2N1B1R1/PPP1QP1P/2KR4 w - - 0 17

where 17.Nxg7 cannot be found as the best, by any engine, he says.[/quote]


Until now it seems ;)

New game
r1r3k1/1bq1bppp/p1npp3/2nB1NP1/1p2P3/2N1B1R1/PPP1QP1P/2KR4 w - - 0 1

Analysis by Stockfish DD 64 SSE4.2:

17.Nxg7 bxc3 18.Qh5 cxb2+ 19.Kb1 Nxe4
=/+ (-0.37 ++) Depth: 26/44 00:01:03 243MN
(Doe, 08.12.2013)

User avatar
Eelco de Groot
Posts: 4096
Joined: Sun Mar 12, 2006 1:40 am
Location: Groningen

Re: New Vitruvius?

Post by Eelco de Groot » Sun Dec 08, 2013 8:13 pm

Hi Jean-Paul,

I have not had the time to look at your Stockfish yet, I am sorry. Hopefully tomorrow.

Is the RTB that you mention here, a form of tablebases? Rg3-h3 seems the stronger move!

Here is the latest Scid Serpent version, that I made this weekend :) I haven't tested it yet it probably still gets beaten by the approximateEval version.


r1r3k1/1bq1bppp/p1npp3/2nB1NP1/1p2P3/2N1B1R1/PPP1QP1P/2KR4 w - -

Engine: Scid Serpent 20131124_037 MP (Q6700, 4 threads, 512 MB)
Latest change: new formula for determining R in Null move
by Tord Romstad, Marco Costalba and Joona Kiiski

.
.
.
.

26/40 0:30 -1.19++ 1.Bxc6 Bxc6 2.Nxe7+ Qxe7 3.Bxc5 dxc5
4.Nb1 c4 5.f4 c3 6.bxc3 bxc3 7.Rd4 e5
8.fxe5 Qxe5 9.Qd3 Bb5 10.Qe3 Rab8
11.Nxc3 Bc4 12.h4 Qa5 13.a4 Qb6
14.Kd1 (74.606.298) 2421

26/40 0:37 -1.15 1.Bxc6 Bxc6 2.Nxe7+ Qxe7 3.Bxc5 dxc5
4.Nb1 c4 5.f4 Qc7 6.f5 exf5 7.exf5 Qf4+
8.Qd2 Qxf5 9.Qxb4 Rab8 10.Qc3 Rd8
11.Nd2 Qf2 12.Rg4 Qxh2 13.Rd4 Rxd4
14.Qxd4 (90.490.663) 2427

27/42 0:46 -1.07++ 1.Bxc6 Bxc6 2.Nxe7+ Qxe7 3.Bxc5 dxc5
4.Nb1 c4 5.f4 Qc7 6.f5 exf5 7.exf5 Qf4+
8.Qd2 Qxf5 9.Qxb4 Rab8 (113.820.577) 2440

27/49 0:55 -0.98++ 1.Bxc6 Bxc6 2.Nxe7+ Qxe7 3.Bxc5 dxc5
4.Nb1 Rd8 5.Rxd8+ Rxd8 6.h4 Bb5
7.Qe3 Qd6 8.Rg1 a5 9.Qd2 Qc7 10.Qe3 c4
11.Rd1 Rxd1+ 12.Kxd1 Qh2 13.Qb6 (135.251.882) 2452


27/49 1:29 -0.86++ 1.Nxg7 exd5 2.Nxd5 (221.188.204) 2464

27/49 1:39 -0.68++ 1.Nxg7 exd5 2.Nxd5 (245.748.877) 2463

27/49 1:49 -0.41++ 1.Nxg7 (269.807.653) 2465

27/49 2:10 0.00++ 1.Nxg7 Ne5 2.Bxc5 bxc3 3.Nxe6 cxb2+
4.Kb1 Qd7 5.Bb3 fxe6 6.Bd4 Ng6
7.Bxb2 Nf4 8.Qg4 (320.158.959) 2459

27/49 2:37 -1.23-- 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Rf3 Ne5
4.Bxb7 Nxf3 5.Bxa8 bxc3 (385.048.088) 2452

27/49 2:45 -0.62 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Qc8 7.Nxe7 Nxe7
8.Qxe7 Bxe4 9.Bd4+ Nxd4 10.Qxe4 Nf5
11.Rh3 Re8 12.Qxb4 Re2 13.Rc3 Qb8
14.Qxb8+ (406.378.314) 2452

28/49 2:57 -0.54++ 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Qc8 7.Nxe7 Nxe7
8.Qxe7 Bxe4 9.Bd4+ Nxd4 10.Qxe4 Nf5
11.Rh3 Re8 12.Qxb4 Re2 13.Rc3 Qb8
14.Qxb8+ (435.948.994) 2449

28/49 3:11 -0.70-- 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Nxf4
7.Bxf4 Rg7 8.Qh5 Ne5 9.Bxe5 dxe5
10.g6 Bxd5 11.Rxd5 Qf8 12.Rf3 Bg5+
13.Kb1 Bf4 14.Rh3 (469.985.172) 2452

28/49 3:23 -0.82-- 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Nxf4
7.Bxf4 Rg7 8.Qh5 Ne5 9.Bxe5 dxe5
10.g6 Bxd5 11.Rxd5 Qf8 12.Rf3 Bg5+
13.Kb1 Bf4 14.Rh3 (497.995.490) 2451

28/49 3:32 -1.01-- 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3
4.Rf3 Raf8 5.Bd4+ e5 6.Rh3 Rh8
7.Bxc5 dxc5 8.Qh6+ Kg8 9.Bd5 Bxd5
10.exd5 cxb2+ 11.Kxb2 (521.458.802) 2451

28/49 3:41 -0.98 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Nxf4
7.Bxf4 Rg7 8.Qe6 Ne5 9.Nxe7 Qxe7
10.Qxd6 Ng6 11.Qxe7 Rxe7 12.Bd6 Rxe4
13.Rgd3 Rc8 14.a3 (542.164.263) 2451

29/49 3:57 -0.90++ 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Nxf4
7.Bxf4 Rg7 8.Qe6 Ne5 9.Bxe5 (583.136.604) 2452

29/49 4:03 -0.82++ 1.Nxg7 Kxg7 2.Qh5 bxc3 3.Qh6+ Kh8
4.Rh3 cxb2+ 5.Kb1 (597.636.173) 2451

29/49 4:19 -1.07-- 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Nxf4
7.Bxf4 Rg7 8.Qe6 Ne5 9.Bxe5 dxe5
10.Nf4 Qc7 11.Rd7 Qc5 12.Ng6+ Rxg6
13.Qxe7 Qxe7 14.Rxe7 (636.195.846) 2452

29/49 4:27 -0.74 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Nxf4
7.Bxf4 Rg7 8.Qe6 Ne5 9.Nxe7 Qxe7
10.Qxd6 Qxd6 11.Rxd6 Re8 12.Rb3 a5
13.a3 Nf7 14.Rb6 (655.627.937) 2451

30/49 5:06 -0.82-- 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 (749.622.956) 2442


30/49 6:33 -0.66++ 1.Rh3 g6 2.Nh6+ Kg7 3.Bxc6 Bxc6
4.Qf3 Be8 5.Bd4+ Kf8 6.Nxf7 Bxf7
7.Rxh7 Bxg5+ 8.Kb1 bxc3 9.e5 Rcb8
10.Rh8+ Ke7 11.Qxc3 Rxb2+ 12.Ka1 Rxh8
13.exd6+ Qxd6 14.Bxc5 (965.451.557) 2451

30/49 6:50 -0.90-- 1.Rh3 g6 2.Nh6+ Kg7 3.Bxc6 Bxc6
4.Qf3 Be8 5.Bd4+ Kf8 6.Nxf7 Bxf7
7.Rxh7 Bxg5+ 8.Kb1 bxc3 (1.004.562.233) 2449


30/49 8:17 -1.01 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Nxf4
7.Bxf4 Rg7 8.Qe6 Ne5 9.Nxe7 Qxe7
10.Qxd6 Qxd6 11.Rxd6 Re8 12.Rb3 a5
13.a3 Nf7 14.Rb6 (1.223.076.118) 2459

31/49 8:49 -0.92++ 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Nxf4
7.Bxf4 Rg7 (1.301.980.933) 2458

31/49 9:07 -0.84++ 1.Nxg7 bxc3 2.Qh5 cxb2+ 3.Kb1 Bf8
4.Nf5 exd5 5.Rh3 (1.345.764.396) 2456

31/49 10:50 -1.09-- 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Nxf4
7.Qxf4 Ne5 8.Kb1 Rc8 9.Bd4 Bxd5
10.exd5 Rxg5 11.Rxg5 Bxg5 12.Bxe5+ dxe5
13.Qxe5+ Qf6 14.Qxf6+ (1.603.344.940) 2464

31/49 11:28 -1.09 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.f4 Kh8 6.Qxf7 Nxf4
7.Bxf4 Rg7 8.Qe6 Ne5 9.Nxe7 Qxe7
10.Qxd6 Qxd6 11.Rxd6 Re8 12.Rb3 a5
13.a3 Nf7 14.Rb6 (1.697.453.653) 2465

32/49 12:19 -1.01++ 1.Nxg7 Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6
4.Nd5 Qd8 5.Nf6 Nf8 6.Rf3 Kh8 7.Nxg8 (1.823.887.514) 2467

32/49 12:50 -0.92++ 1.Nxg7 bxc3 2.Qh5 cxb2+ 3.Kb1 Bf8
4.Nf5 exd5 5.Rh3 (1.899.892.572) 2466

32/49 13:36 -0.80++ 1.Nxg7 bxc3 2.Qh5 cxb2+ 3.Kb1 Bf8
4.Nf5 exd5 5.Rh3 (2.013.166.882) 2466


32/49 18:00 -0.62++ 1.Rh3 g6 2.Nh6+ Kg7 3.Bxc6 (2.687.444.800) 2488

32/49 19:27 -0.35++ 1.Rh3 g6 2.Nh6+ Kg7 3.Bxc6 Bxc6
4.Qf3 Be8 5.Nf5+ exf5 6.Bd4+ Kg8
7.Nd5 Bxg5+ 8.Kb1 Qd8 9.exf5 Bd7
10.fxg6 (2.906.780.228) 2489

32/59 21:12 0.00 1.Rh3 g6 2.Nh6+ Kg7 3.Bxc6 Bxc6
4.Qf3 Be8 5.Nf5+ exf5 6.Bd4+ Kg8
7.Nd5 Bxg5+ 8.Kb1 Qd8 9.exf5 h6
10.fxg6 fxg6 11.Rxh6 Bxh6 12.Nf6+ Kf8
13.Nh7+ Kg8 14.Nf6+ (3.169.113.228) 2491

33/59 25:46 -0.08-- 1.Rh3 g6 2.Nh6+ Kg7 3.Bxc6 bxc3
4.Qf3 Rf8 5.Bxc5 Bxg5+ 6.Kb1 dxc5
7.Rd7 Qf4 8.Qxf4 Bxf4 9.Bxb7 Rad8
10.Rxd8 Rxd8 11.a4 Rb8 12.Bxa6 Rxb2+
13.Ka1 Bxh6 14.Rxc3 (3.867.833.858) 2501

33/59 27:18 -0.16-- 1.Rh3 g6 2.Bxc6 bxc3 3.Nh6+ Kg7
4.Qf3 Rf8 5.Bxc5 Bxg5+ 6.Kb1 dxc5
7.Rd7 Qf4 8.Qxf4 Bxf4 9.Bxb7 Rad8
10.Rxd8 Rxd8 11.a4 Rb8 12.Bxa6 Rxb2+
13.Ka1 Bxh6 14.Rxc3 (4.102.867.053) 2503

33/59 29:28 -0.28-- 1.Rh3 g6 2.Bxc6 bxc3 3.Nh6+ Kg7 (4.432.635.148) 2506

33/59 33:29 0.00 1.Rh3 g6 2.Bxc6 bxc3 3.Nh6+ Kg7
4.Bxb7 Qxb7 5.b3 Nxe4 6.Nxf7 h5
7.gxh6+ Kxf7 8.Qg4 Nf6 9.Rf3 Rh8
10.Bg5 Qb5 11.Re1 Qd5 12.Kb1 Rae8
13.Bxf6 Bxf6 14.Qf4 (5.036.690.943) 2506

34/59 34:04 0.00 1.Rh3 g6 2.Bxc6 bxc3 3.Nh6+ Kg7
4.Bxb7 Qxb7 5.b3 Nxe4 6.Nxf7 h5
7.gxh6+ Kxf7 8.Qg4 Nf6 9.Rf3 Rh8
10.Bg5 Qb5 11.Re1 Qd5 12.Kb1 Rae8
13.Bxf6 Bxf6 14.Qf4 (5.125.627.849) 2507


best move: Rg3-h3 time: 34:04.798 min n/s: 2.507.310 nodes: 5.125.627.849

Regards, Eelco
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan

noctiferus
Posts: 364
Joined: Sun Oct 04, 2009 11:27 am
Location: Italy

Re: New Vitruvius?

Post by noctiferus » Sun Dec 08, 2013 8:49 pm

Could you post your evaluation of the suggested move?

Does your line avoid the troubles shown in the youtube analysis?
if you can post it, thx for your attention!

e

User avatar
Eelco de Groot
Posts: 4096
Joined: Sun Mar 12, 2006 1:40 am
Location: Groningen

Re: New Vitruvius?

Post by Eelco de Groot » Mon Dec 09, 2013 6:04 pm

Hello Enrico, I have not checked what difficulties are discussed in the YouTube video, but so far Scid Serpent is not much impressed with the move 17. Nxg7 8-) Not better than the alternative I think. But if the suggestion is that it should be good enough for a draw, then I believe that is possible and the engine I think can finally see that too. I just let it run for a good while and the evaluation, from Black's viewpoint it is positive, has gone steadily down towards zero, but very slowly. This version of the engine is supposedly slightly less selective than 20131124_017 so the depth is not super even after a 1000 minutes of analysis, it is tacticallly probably too complex to go deeper and hash is limited. There is only one real first move, Kxg7 considered so I think the variation only becomes less forced after the first move. At least I do not see the engine avoiding Kxg7 here as it did in two first analysis fail highs (above, in orange) at iteration 32.

Eelco


[D]r1r3k1/1bq1bpNp/p1npp3/2nB2P1/1p2P3/2N1B1R1/PPP1QP1P/2KR4 b - -

Engine: Scid Serpent 20131124_037 MP (Q6700, 4 threads, 512 MB)
Latest change: new formula for determining R in Null move
by Tord Romstad, Marco Costalba and Joona Kiiski

19/32 0:01 +2.14 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 cxb2+ 7.Kb1 Kh8
8.gxf7 Rf8 9.Bxb7 Nxb7 10.Bd4+ e5
11.Bxb2 Bf6 12.f4 Qxf7 13.Qxf7 Rxf7
14.f5 (4.086.570) 2093

20/32 0:02 +1.97 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rh3 Rh8 6.Bd4+ e5 7.Bxc5 dxc5
8.Rd7 Qxc6 9.Rxe7 Qxe4 10.Rxc3 Bd5
11.Re3 Qg6 12.Qh4 Rd8 13.R3xe5 Bxa2
14.Rxc5 (5.611.680) 2157

21/37 0:03 +1.89-- 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 Kh8 7.gxf7 Rf8
8.Bxb7 cxb2+ 9.Kb1 Nxb7 10.Qg4 Rc8
11.Bd4+ e5 12.Bxb2 Na5 13.Rc1 (6.959.318) 2185

21/37 0:03 +1.81-- 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 Kh8 7.gxf7 Rf8
8.Bxb7 cxb2+ 9.Kb1 Nxb7 10.Qg4 Rc8
11.Bd4+ e5 12.Bxb2 Na5 13.Rc1 (7.092.834) 2177

21/37 0:03 +1.69-- 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 Kh8 7.gxf7 Rf8
8.Bxb7 cxb2+ 9.Kb1 Nxb7 10.Qg4 Rc8
11.Bd4+ e5 12.Bxb2 Na5 13.Rc1 (7.359.261) 2171

21/37 0:03 +2.06++ 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 Kh8 7.gxf7 Rf8
8.Bxb7 cxb2+ 9.Kb1 Nxb7 10.Qg4 Bf6
11.Qxe6 Qxf7 12.Qxf7 Rxf7 13.f4 Kg8
14.a4 Re7 (8.183.197) 2192

21/37 0:03 +2.00 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Bd4+ e5 6.Rh3 Rh8 7.Bxc5 dxc5
8.Qh6+ Kg8 9.Bd5 Bxd5 10.exd5 cxb2+
11.Kxb2 Rb8+ 12.Rb3 c4 13.Qc6 Rxb3+
14.axb3 Qxc6 (8.634.997) 2194

22/40 0:04 +1.91-- 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 Kh8 7.gxf7 Rf8
8.Bxb7 cxb2+ 9.Kb1 Nxb7 10.Rg1 Bf6
11.Rg8+ Rxg8 12.fxg8Q+ Kxg8 13.Qe8+ Kg7
14.Qxe6 Nc5 (9.864.553) 2209

22/40 0:04 +1.83-- 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 Kh8 7.gxf7 Rf8
8.Bxb7 cxb2+ 9.Kb1 Nxb7 10.Rg1 Bf6
11.Rg8+ Rxg8 12.fxg8Q+ Kxg8 13.Qe8+ Kg7
14.Qxe6 Nc5 (9.933.641) 2202

22/40 0:04 +1.71-- 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 Kh8 7.gxf7 Rf8
8.Bxb7 cxb2+ 9.Kb1 Nxb7 10.Rg1 Bf6
11.Rg8+ Rxg8 12.fxg8Q+ Kxg8 13.Qe8+ Kg7
14.Qxe6 Nc5 (9.968.124) 2197

22/40 0:04 +2.04 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 Kh8 7.gxf7 Rf8
8.Bxb7 cxb2+ 9.Kb1 Nxb7 10.Rg1 Bf6
11.Rg8+ Rxg8 12.fxg8Q+ Kxg8 13.Qe8+ Kg7
14.Qxe6 Qd8 (10.715.272) 2205

23/40 0:06 +2.12++ 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 Kh8 7.gxf7 Rf8
8.Bxb7 cxb2+ 9.Kb1 Nxb7 10.Rg1 Bf6
11.Rg8+ Rxg8 12.fxg8Q+ Kxg8 13.Qe8+ Kg7
14.Qxe6 Qd8 (15.109.754) 2289

23/40 0:07 +2.20++ 1...Kxg7 2.Qh5 Rg8 3.Bxc5 dxc5 4.Rh3 Kf8
5.Bxe6 Rg7 6.Nd5 Qe5 7.Bf5 Bxg5+
8.Kb1 Nd4 9.Bxh7 f5 (17.935.200) 2329

23/40 0:08 +1.95-- 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Rxf7+ Rxf7 6.g6 Kh8 7.gxf7 Rf8
8.Bxb7 cxb2+ 9.Kb1 Nxb7 10.Rg1 Bf6
11.Rg8+ Rxg8 12.fxg8Q+ Kxg8 13.Qe8+ Kg7
14.Qxe6 Qd8 (19.609.135) 2342

23/41 0:09 +1.77-- 1...Kxg7 2.Qh5 Rg8 3.Rh3 Kf8 4.Bxc6 bxc3
5.Qxh7 Bxc6 6.Rf3 Bxg5 7.Bxg5 cxb2+
8.Kxb2 Rxg5 9.Qh6+ Ke8 10.Qh8+ Ke7
11.Qf6+ Kd7 12.Qxg5 Kc8 13.Ka1 Bxe4
14.Qg8+ Kb7 (22.575.141) 2336

23/41 0:09 +1.77 1...Kxg7 2.Qh5 Rg8 3.Rh3 Kf8 4.Bxc6 bxc3
5.Qxh7 Bxc6 6.Rf3 Bxg5 7.Bxg5 cxb2+
8.Kxb2 Rxg5 9.Qh6+ Ke8 10.Qh8+ Ke7
11.Qf6+ Kd7 12.Qxg5 Kc8 13.Ka1 Bxe4
14.Qg8+ Kb7 (22.870.842) 2331

24/44 0:11 +1.69-- 1...Kxg7 2.Qh5 Rg8 3.Rh3 Kf8 4.Bxc6 bxc3
5.Qxh7 Bxc6 6.Rf3 Bxg5 7.Bxg5 cxb2+
8.Kxb2 Rxg5 9.Qh6+ Ke8 10.Qh8+ Ke7
11.Qf6+ Kd7 12.Qxg5 Kc8 13.Ka1 Bxe4
14.Qg8+ Kb7 (25.972.703) 2341

24/44 0:11 +1.61-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qa5
5.Nf6 Nf8 6.Nd5 Ng6 7.Nf6 Bxf6
8.gxf6+ Kh8 9.Qxh7+ Kxh7 10.Rh3+ Nh4
11.Rxh4+ Kg6 12.Rh6+ (28.057.594) 2355

24/44 0:12 +1.49-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qa5
5.Nf6 Nf8 6.Nd5 Ng6 7.Nf6 Bxf6
8.gxf6+ Kh8 9.Qxh7+ Kxh7 10.Rh3+ Nh4
11.Rxh4+ Kg6 12.Rh6+ (28.254.387) 2351

24/44 0:12 +1.31-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qa5
5.Nf6 Nf8 6.Nd5 Ng6 7.Nf6 Bxf6
8.gxf6+ Kh8 9.Qxh7+ Kxh7 10.Rh3+ Nh4
11.Rxh4+ Kg6 12.Rh6+ (28.598.271) 2346

24/44 0:12 +1.04-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qa5
5.Nf6 Nf8 6.Nd5 Ng6 7.Nf6 Bxf6
8.gxf6+ Kh8 9.Qxh7+ Kxh7 10.Rh3+ Nh4
11.Rxh4+ Kg6 12.Rh6+ (29.109.051) 2340

24/45 0:14 +0.98 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Bc8 9.Qh6 Rg6 10.Qh4 Bd7
11.Nf6 Bxf6 12.gxf6 Qxf6 13.Qxf6+ Rxf6
14.Bxd6 Rf7 (33.759.114) 2341

25/45 0:15 +1.07++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Ne5 9.Bxe5 dxe5 10.h4 Qf8
11.c4 bxc3 12.Rxc3 Bxd5 13.Qxd5 Qf4+
14.Kb1 Rf8 (37.406.743) 2352

25/45 0:16 +0.90-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Ne5 9.Nxe7 Qxe7 10.Qxd6 Qxd6
11.Rxd6 Re8 12.Rd4 a5 13.Re3 (38.804.600) 2351

25/45 0:16 +1.15++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Ne5 9.Nxe7 Qxe7 10.Qxd6 Qxd6
11.Rxd6 Re8 12.Rd4 a5 13.Re3 Rf7
14.Bxe5+ Rxe5 (39.923.328) 2356

25/45 0:17 +0.92 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Ne5 9.Nxe7 Qxe7 10.Qxd6 Qxd6
11.Rxd6 Re8 12.c3 bxc3 13.Rxc3 Rf7
14.Rf6 Rxf6 (41.042.063) 2353

26/45 0:19 +1.01++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Ne5 9.Nxe7 Qxe7 10.Qxd6 Qxd6
11.Rxd6 Re8 12.c3 bxc3 13.Rxc3 Rf7
14.Rf6 Rd7 (45.538.928) 2370

26/45 0:19 +1.09++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Ne5 9.Nxe7 Qxe7 10.Qxd6 Qxd6
11.Rxd6 Re8 12.c3 bxc3 13.Rxc3 Rf7
14.Rf6 Rd7 (46.786.040) 2376

26/45 0:20 +0.84-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Ne5 9.Nxe7 Qxe7 10.Rxd6 Re8
11.Qf6 Bxe4 12.Bxe5 Qxe5 13.Rd8 Qe7
14.Rxe8+ Qxe8 (49.298.638) 2375

26/45 0:22 +0.82 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Qf8 9.Nf6 Qf7 10.Qxf7 Rxf7
11.Bxd6 Bxf6 12.gxf6 Rxf6 13.Bc5 Rf7
14.Rgd3 Rg8 (53.860.873) 2371

27/45 0:26 +0.90++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Qf8 9.Nf6 Qf7 10.Qxf7 Rxf7
11.Bxd6 Bxf6 12.gxf6 Rxf6 13.Bc5 Rg8
14.Rxg8+ Kxg8 (61.808.152) 2346

27/45 0:27 +0.98++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 (64.010.571) 2350

27/45 0:29 +0.82 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Qf8 9.Nf6 Qf7 10.Qxf7 Rxf7
11.Bxd6 Bxf6 12.gxf6 Rxf6 13.Bc5 Rf7
14.Rgd3 Rg8 (68.870.497) 2348

28/45 0:33 +0.90++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Qf8 9.Nf6 Qf7 10.Qxf7 Rxf7
11.Bxd6 Bxf6 12.gxf6 Rxf6 13.Bc5 Rf7
14.Rgd3 Rg8 (80.048.016) 2373

28/45 0:34 +0.98++ 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Bd4+ e5 6.Rh3 Rh8 7.Bxc5 dxc5
8.Qh6+ Kg8 9.Bd5 cxb2+ 10.Kxb2 Bxd5
11.exd5 Rb8+ 12.Rb3 c4 13.Qc6 Rxb3+
14.cxb3 Qxc6 (83.209.373) 2378

28/45 0:44 +0.88 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Qf8 9.Nf6 Qf7 10.Qxf7 Rxf7
11.Bxd6 Bxf6 12.gxf6 Rxf6 13.Bc5 Rf7
14.Rgd3 Rg8 (107.809.004) 2402

29/45 0:49 +0.96++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Qf8 9.Nf6 Qf7 10.Qxf7 Rxf7
11.Bxd6 Bxf6 12.gxf6 Rxf6 13.Bc5 Rf7
14.Rgd3 Rg8 (119.554.569) 2411

29/45 1:10 +0.96 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Qf8 9.Nf6 Qf7 10.Qxf7 Rxf7
11.Bxd6 Bxf6 12.gxf6 Rxf6 13.Bc5 Rf7
14.Rgd3 Rg8 (172.032.888) 2436

30/45 1:22 +1.05++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 (201.481.674) 2452

30/45 1:28 +1.13++ 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rf3 Raf8
5.Bd4+ e5 6.Rh3 Rh8 7.Bxc5 dxc5
8.Qh6+ Kg8 9.Bd5 cxb2+ 10.Kxb2 Bxd5
11.exd5 Rb8+ 12.Rb3 Qd8 13.Qxa6 Bxg5
14.Rg1 Kf8 (218.013.106) 2457

30/45 2:07 +1.21 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qh5 Ne5 9.Kb1 Bxd5 10.exd5 Qc7 (317.717.360) 2482

31/45 3:00 +1.13-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.Nf6 (451.412.025) 2497

31/45 3:31 +1.05-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Rg6 7.h4 Nc5 8.Nxe7 Qxe7
9.Bd4+ Nxd4 10.Qxe7 Ne2+ 11.Kb1 Nxg3
12.f5 Rg7 13.Qxd6 (529.165.259) 2503

31/46 4:00 +1.15 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qh5 Ne5 9.h4 Rc8 10.Kb1 a5 11.Rg2 Bxd5
12.exd5 Qc7 13.Qe2 Bf8 14.Bxe5 dxe5 (602.050.515) 2500

32/46 5:28 +1.07-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 (826.079.590) 2512

32/46 6:30 +0.98-- 1...Kxg7 2.Qh5 (983.595.070) 2515

32/46 8:15 +1.23++ 1...Kxg7 2.Qh5 Rg8 3.Bxc6 Bxc6 4.Rf3 Raf8
5.Rh3 Rh8 6.Bd4+ e5 7.Bxc5 bxc3
8.Qh6+ Kg8 9.Bxd6 cxb2+ 10.Kxb2 Bxd6 (1.245.702.390) 2513

32/46 8:46 +1.23 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qh5 Ne5 9.Bxe5 dxe5 10.g6 Bxd5
11.exd5 Bd6 12.gxh7 Raa7 13.Qf5 Rxg3
14.hxg3 Rxh7 (1.323.648.049) 2512

33/50 12:48 +1.15-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 (1.937.123.293) 2521

33/50 13:35 +1.21 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qh5 Ne5 9.h4 a5 10.Kb1 Qe8 11.Qe2 Ba6
12.Qd2 Bf8 13.Nf6 Qa4 14.b3 Qb5 (2.056.896.542) 2522

34/50 17:11 +1.13-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Ng7 7.Rh3 Bc8 8.Rh6 Rf8
9.Qg6 (2.612.774.629) 2533

34/50 18:55 +1.29++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 (2.856.476.500) 2515

34/50 23:20 +1.05-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Ng7 7.Rh3 Bc8 8.Rh6 Rf8
9.Qg6 (3.526.346.119) 2517

34/50 25:19 +1.15 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Qf8 9.Nf6 Rd8 10.Rgd3 Bc8
11.Qd5 Bxf6 12.gxf6 Qxf6 13.Bxd6 Bd7
14.Rg3 h6 (3.813.446.490) 2508

35/50 31:49 +1.07-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 (4.783.749.071) 2505

35/50 33:31 +1.23++ 1...Kxg7 2.Qh5 (5.047.284.125) 2508

35/50 40:17 +0.98-- 1...Kxg7 2.Qh5 bxc3 (6.075.584.361) 2512

35/50 43:25 +1.03 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Qf8 9.Qf5 Ne5 10.Nxe7 Rxe7
11.g6 Nxg6 12.Qxf8+ Nxf8 13.Bxd6 Rxe4
14.Rd4 Ng6 (6.549.306.526) 2513

36/50 47:19 +1.11++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 (7.168.347.713) 2524

36/53 49:37 +1.19++ 1...Kxg7 2.Qh5 Rg8 3.Bxc6 Bxc6 4.Rf3 Raf8
5.Bd4+ e5 6.Rh3 Rh8 7.Bxc5 bxc3
8.Qh6+ Kg8 9.Bxd6 (7.529.357.950) 2528

36/53 52:44 +1.31++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qh5 (8.011.948.050) 2531

36/55 63:28 +1.37 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Ne5 9.Nxe7 Qxe7 10.Rxd6 Re8
11.Qf6 Kg8 12.Rd4 a5 13.a3 Nc6
14.Rd1 Rf7 (9.687.860.170) 2543

37/55 76:14 +1.29-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 (11.700.350.215) 2557

37/55 89:30 +1.21-- 1...Kxg7 2.Qh5 (13.800.459.449) 2569

37/55 113:34 +1.09-- 1...Kxg7 2.Qh5 (17.594.556.390) 2582

37/55 136:48 +0.90-- 1...Kxg7 2.Qh5 bxc3 3.Qh6+ Kh8 4.Rh3 cxb2+
5.Kb1 (21.295.891.017) 2594

37/61 148:42 +1.45++ 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Ne5 9.h4 Qf8 10.Qf5 Nc4
11.Qxf8+ Rxf8 12.Rd4 Rgf7 13.Rxc4 Bxd5
14.exd5 Rxf4 (23.196.945.835) 2599

37/63 156:12 +1.43 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Bxf4 Rg7
8.Qe6 Ne5 9.Nxe7 Qxe7 10.Qxd6 Re8
11.Qxe7 Rgxe7 12.a3 bxa3 13.Rxa3 Rf7
14.Bd2 Kg8 (24.382.205.560) 2601

38/63 176:13 +1.35-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 (27.572.978.014) 2607

38/63 201:16 +1.27-- 1...Kxg7 2.Qh5 (31.565.432.228) 2613

38/63 223:28 +1.37 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Qxf4 Ne5
8.Kb1 Rc8 9.Bd4 Bxd5 10.exd5 Rxg5
11.Rxg5 Bxg5 12.Bxe5+ dxe5 13.Qxb4 Qf6
14.d6 (35.113.698.118) 2618

39/63 261:56 +1.31 1...Kxg7 2.Qh5 Rg8 3.Bxe6 Nxe6 4.Nd5 Qd8
5.f4 Kh8 6.Qxf7 Nxf4 7.Qxf4 Ne5
8.Kb1 Rc8 9.Bd4 Bxd5 10.exd5 Rxg5
11.Rxg5 Bxg5 12.Bxe5+ dxe5 13.Qxb4 Qf6
14.Qg4 Rg8 (41.267.524.857) 2625

40/63 334:19 +1.23-- 1...Kxg7 2.Qh5 Rg8 3.Bxe6 (52.904.425.999) 2637

40/63 401:34 +1.15-- 1...Kxg7 2.Qh5 (63.709.222.808) 2644

40/63 448:09 +1.39++ 1...Kxg7 2.Qh5 Rg8 3.g6 fxg6 (71.172.215.837) 2646

40/64 523:51 +1.03-- 1...Kxg7 2.Qh5 Rg8 3.Bxc6 bxc3 4.Rh3 (83.384.793.037) 2652

40/64 598:47 +0.75-- 1...Kxg7 2.Qh5 bxc3 3.Qh6+ Kg8 4.Rh3 (95.428.427.224) 2656

40/66 627:22 +0.84 1...Kxg7 2.Qh5 Rg8 3.Bxc6 Bxc6 4.Rf3 Raf8
5.Rh3 Rh8 6.Nd5 Bxd5 7.exd5 Kg8
8.Kb1 Rc8 9.Rc1 Bf8 10.Bxc5 dxc5
11.dxe6 fxe6 12.Qe2 Re8 13.Re1 Bg7
14.Qxa6 Bd4 (100.068.271.904) 2658

41/66 642:15 +0.92++ 1...Kxg7 2.Qh5 Rg8 3.Bxc6 Bxc6 (102.500.997.263) 2659

41/66 650:02 +1.01++ 1...Kxg7 (103.753.164.741) 2660

41/66 728:33 +0.76-- 1...Kxg7 2.Qh5 bxc3 3.Qh6+ (116.541.136.883) 2666

41/66 779:48 +0.76 1...Kxg7 2.Qh5 Rg8 3.Bxc6 Bxc6 4.Rf3 Raf8
5.Rh3 Rh8 6.Nd5 Bxd5 7.exd5 Rc8
8.Kb1 Kg8 9.Rc1 Bf8 10.Bxc5 dxc5
11.dxe6 fxe6 12.Qg4 Qe5 13.Re3 Qf5
14.Qe2 Re8 (124.802.693.190) 2667

42/66 806:10 +0.84++ 1...Kxg7 2.Qh5 Rg8 3.Bxc6 Bxc6 4.Rf3 Raf8
5.Rh3 Rh8 6.Nd5 (129.109.775.142) 2669

42/66 822:31 +0.92++ 1...Kxg7 (131.768.931.397) 2670

42/66 858:53 +1.05++ 1...Kxg7 2.Qh5 (137.638.277.142) 2670

42/66 887:23 +1.23++ 1...Kxg7 (142.236.798.375) 2671

42/66 1048:25+0.68-- 1...Kxg7 2.Qh5 bxc3 3.Qh6+ Kh8 4.Rh3 (168.436.368.224) 2677
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan

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