An idea for a different type of tournament

[mmt]

Do you think SF mate announcements are 100% reliable?

I've seen it go down from a mate score before. But I think Matefinder's should be.

[jp]

I think going down is okay, because announcing "it's mate in X" we always take to mean "at most X". Going up would be bad, though.

[mmt]

I meant I saw it show a mate score and then just a winning score. But then it usually comes back to a mate. I'm not a SF expert, so maybe somebody else can comment.

[jp]

I was adding this when you posted:

We've had some (but not much) discussion in the other thread about what it might mean when SF announces mates in 30, calculates longer, and then changes its mind to mate in 50, etc. (i.e. whether mate in 30 is wrong, or whether SF "forgot" the correct mate in 30, or...).


There are also other reasons to question SF mate announcements.

Here's what Alayan's SF-dev announced.

Restarting again from the inital position without clearing hash :

info depth 42 seldepth 34 multipv 1 score mate 16 nodes 409167870 nps 4772193 hashfull 852 tbhits 0 time 85740 pv e2e3 g7g6 d1f3 c7c6 f3f4 d7d6 f4h6 f7f5 h6h7 e8d8 h7g6 f5f4 g1f3 f4e3 d2e3 a7a6 f3g5 b7b5 g6e6 d6d5 g5f7 d8c7 e6e7 c7b6 f7d6 b6a5 e7a7 a5a4 a7a6 a4b4 a6a3

For the moment, say it is mate in 16.

If I haven't stuffed up inputting SF-dev's PV, it goes

1. e3 g6 2. Qf3 c6 3. Qf4 d6 4. Qh6 f5 5. Qxh7 Kd8 6. Qxg6 f4 7. Nf3 fxe3 8. dxe3 a6 9. Ng5 b5 10. Qe6 d5 11. Nf7+ Kc7 12. Qxe7+ Kb6 13. Nd6 Ka5 14. Qa7 Ka4 15. Qxa6+ Kb4 16. Qa3#.

But in that line, SF10 thinks 9...b5 allows mate in 15:

10. Qe6 d5 11. Qxc6 e5 12. Bd2 a5 13. Bxa5+ Ke7 14. Qe6+ Kf8 15. Qf7#.

SF10 thinks after 9. Ng5, Black can delay mate (back to SF-dev's claimed 16) by

9... c5 10. Qe6 Kc7 11. Qxe7+ Kc6 12. Nf7 Kb6 13. Nd8 d5 14. Qxb7+ Ka5 15. Qxa6+ Kb4 16. a3#


So even if 16 is the exact number, SF-dev (according to SF10) is giving the wrong line.


It turns out SF10 does think that it's mate in 15 at least as early as after 6... f4 [update: now after 5...Kd8]:

7.exf4 Kd7 8.a4 a6 9.Ra3 c5 10.Qe4 c4 11.Qxb7+ Ke6 12.Re3+ Kf5 13.Rxe7 Kg6 14.Qd5 c3 15.Qg5#

Whether, if you feed this into SF-dev and then go back to the start, it'll show mate in 15, I don't know. It might just avoid its first 6 moves, choosing a different PV, and stay with mate in 16. Who knows?

[Jouni]

Don't expect SF 11 to find shortest mate in 2 posted positions. It can't even find mate in 11

[d]3qk3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1

[mmt]

[d]r3k3/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQq - 0 1
SF 11 found a mate in 84 after 1.5 hours on my computer. Depth 52. Then it went down to a mate in 28 and now it's down to 24 at depth 70 (2 hours).

[jp]

Just make sure you don't lose its final PV!

[jp]

SF 11 found a mate in 84 after 1.5 hours on my computer. Depth 52. Then it went down to a mate in 28 and now it's down to 24 at depth 70 (2 hours).

Did it get any lower, Jim? And do you have SF's PV?

[mmt]

59/50 1:49:41 398,262,715k 60,513k +M25 e2-e3 g7-g6 Qd1-g4 c7-c6 Qg4-h4 h7-h5 Qh4-d4 f7-f6 Qd4-d3 Ke8-d8 Qd3xg6 Kd8-c7 Qg6xh5 Ra8-f8 Qh5-h7 Kc7-d8 Qh7-g7 Rf8-e8 Ng1-f3 Kd8-c7 Qg7-f7 Kc7-d8 Bf1-d3 Re8-h8 Bd3-g6 a7-a6 Qf7-g7 Rh8-h5 Bg6xh5 a6-a5 Qg7-f8+ Kd8-c7 Qf8xe7 a5-a4 Bh5-g6 a4-a3 Nb1xa3 f6-f5 Nf3-e5 f5-f4 e3xf4 Kc7-b6 Qe7-d8+ Kb6-a7 Ne5xd7 b7-b6 Qd8xb6+ Ka7-a8 Qb6-a6+

It traps the rook. I bet there is a faster mate.

[pgn][Event "Nibbler Line"]
[Site "The fevered dreams of a neural net"]
[Date "2020.02.14"]
[Round "1"]
[White "White"]
[Black "Black"]
[Result "*"]
[FEN "r3k3/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQq - 0 1"]
[SetUp "1"]

1. e3 g6 2. Qg4 c6 3. Qh4 h5 4. Qd4 f6 5. Qd3 Kd8 6. Qxg6 Kc7 7. Qxh5 Rf8 8. Qh7
Kd8 9. Qg7 Re8 10. Nf3 Kc7 11. Qf7 Kd8 12. Bd3 Rh8 13. Bg6 a6 14. Qg7 Rh5
15. Bxh5 a5 16. Qf8+ Kc7 17. Qxe7 a4 18. Bg6 a3 19. Nxa3 f5 20. Ne5 f4 21. exf4
Kb6 22. Qd8+ Ka7 23. Nxd7 b6 24. Qxb6+ Ka8 25. Qa6+ *[/pgn]


I haven't run it much longer than this.

[Uri Blass]

I ran Stockfish dev on the position with only king and pawns for black, several days ago when this was discussed in TCEC chat.

Stockfish displayed a mate score after I let it search for some time.

EDIT :

info depth 33 seldepth 42 multipv 1 score mate 39 nodes 944199624 nps 4600690 hashfull 989 tbhits 0 time 205230 pv e2e3 g7g6 d1f3 c7c6 f3f4 d7d6 f4h6 g6g5 h6h7 a7a6 h7g8 e8d7 g8f7 g5g4 g1e2 d7c8 f7e8 c8c7 e8e7 c7b8 e7d6 b8a8 d6d8 a8a7 d8c7 c6c5 c7c5 a7b8 e2d4 b7b5 c5b6 b8c8 b6a6 c8b8 a6b5 b8a8 b5a5 a8b8 a5e5 b8a7 e5c7 a7a8

info depth 35 seldepth 36 multipv 1 score mate 18 nodes 1073437129 nps 4615980 hashfull 997 tbhits 0 time 232548 pv e2e3 g7g6 d1f3 c7c6 f3f4 d7d6 f4h6 e8d7 h6h7 d7e8 h7g8 e8d7 g8f7 a7a5 g1f3 a5a4 f7g6 a4a3 b1a3 c6c5 g6f7 d7d8 f7f8 d8d7 f1b5 d7c7 f8e7 c7b8 e7d6 b8a7 f3e5 c5c4 e5d7 b7b6 d6b8

info depth 38 seldepth 36 multipv 1 score mate 17 nodes 1243478381 nps 4635693 hashfull 999 tbhits 0 time 268240 pv e2e3 g7g6 d1f3 c7c6 f3f4 d7d6 f4h6 e8d7 h6h7 f7f6 h7g6 a7a6 g1f3 d6d5 g6f7 c6c5 f7d5 d7c8 d5e6 c8b8 e6e7 b8a7 e7c5 a7b8 f3d4 f6f5 d4f5 b7b6 c5e7 b8a8 f1a6 b6b5 e7b7

I remembered it had 2. Qg4 in its mate PV the first time around, so I made it search from there for a time and it came with

info depth 34 seldepth 33 multipv 1 score mate -15 nodes 318192400 nps 3535117 hashfull 681 tbhits 0 time 90009 pv a7a5 g4d4 d7d6 d4h8 e8d7 h8h7 d7e8 g1f3 a5a4 h7g8 e8d7 g8f7 a4a3 b1a3 d7d8 f7e6 g6g5 f3g5 c7c6 g5f7 d8c7 e6e7 c7b6 f7d6 b6a5 a3c4 a5a4 b2b3 a4b4 c1a3

Which is also a mate in 17 from the initial position.

Restarting again from the inital position without clearing hash :

info depth 42 seldepth 34 multipv 1 score mate 16 nodes 409167870 nps 4772193 hashfull 852 tbhits 0 time 85740 pv e2e3 g7g6 d1f3 c7c6 f3f4 d7d6 f4h6 f7f5 h6h7 e8d8 h7g6 f5f4 g1f3 f4e3 d2e3 a7a6 f3g5 b7b5 g6e6 d6d5 g5f7 d8c7 e6e7 c7b6 f7d6 b6a5 e7a7 a5a4 a7a6 a4b4 a6a3

Bringing out the knights early can probably allow a slightly faster mate.

SF can show a faster mate than your mate in 16 with my slow hardware(mate in 15).

FEN: 4k3/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1

Stockfish_20021515_x64_modern:
1/1 00:00 40 7k +42.98 1.Nc3
2/2 00:00 214 31k +42.78 1.Nc3 Kf8
3/3 00:00 448 9k +43.00 1.Nc3 Kf8 2.Nd5
4/4 00:00 2k 45k +43.30 1.Nf3 f6 2.Nc3
5/5 00:00 5k 98k +43.57 1.Nc3 Kd8 2.Nf3 h6
6/6 00:00 10k 53k +43.44 1.Nc3 c6 2.Nf3 f6 3.Nd4 Kf7
7/8 00:00 37k 191k +43.43 1.e3 g6 2.Nc3 c6 3.Rb1 Kf8 4.Nf3
8/9 00:00 74k 363k +43.64 1.Nc3 c6 2.Nf3 f6 3.d3 Kf7 4.Be3 a5 5.Nd4
9/12 00:00 145k 591k +43.71 1.Nf3 a6 2.Nc3 Kf8 3.d3 d6 4.Be3 e6 5.Nd4
10/14 00:00 289k 1,005k +43.79 1.Nc3 c6 2.e3 g6 3.Bd3 f6 4.Nf3 Kf8 5.0-0 d5 6.Qe2 Kg7
11/14 00:00 440k 1,355k +43.82 1.Nc3 c6 2.e3 g6 3.Bd3 e6 4.Nf3 Kf8 5.0-0 Kg7 6.Nd4 d5 7.Qg4 h5
12/19 00:00 734k 1,858k +44.29 1.e3 g6 2.Qg4 c6 3.Qd4 e6 4.Qxa7 b5 5.Nf3 Ke7 6.Nc3
13/17 00:00 968k 2,167k +44.63 1.e3 g6 2.Qg4 c6 3.Qd4 f6 4.Qxa7 b5 5.Nf3 e5 6.Bd3 Kd8 7.Nc3
14/20 00:00 1,527k 2,689k +45.00 1.e3 g6 2.Qg4 a5 3.Qd4 e6 4.Qa7 c6 5.Qxb7 f6 6.Qa8+ Kf7 7.Qxa5 h5 8.Nf3 Kg7 9.Nc3
15/23 00:00 2,499k 3,179k +45.27 1.e3 g6 2.Qg4 e6 3.Qf4 c6 4.Qb8+ Ke7 5.Qxb7 a5 6.Nf3 f6 7.Qa8 h5 8.Qh8 e5 9.Nc3 g5 10.Qh7+ Ke8
16/28 00:01 4,379k 3,879k +45.56 1.e3 g6 2.Qg4 e6 3.Qf4 c6 4.Qb8+ Ke7 5.Qxb7 a5 6.Nf3 f6 7.Qa8 g5 8.Qh8 g4 9.Qg7+ Ke8 10.Qxg4 Kf8 11.Nc3 f5 12.Qd4
17/28 00:02 9,559k 4,415k +45.83 1.e3 g6 2.Qg4 c6 3.Qd4 e6 4.Qxa7 b5 5.Nf3 f6 6.Qb8+ Ke7 7.Qg8 Kd6 8.Qxh7 g5 9.Qg6 f5 10.Qxg5
18/24 00:03 14,528k 4,616k +46.06 1.e3 g6 2.Qg4 a5 3.Qd4 e6 4.Qa7 c6 5.Qxb7 g5 6.Nf3 f6 7.Qa8+ Ke7 8.Qh8 g4 9.Qg7+ Ke8 10.Qxg4 Kf8 11.Bd3
19/28+ 00:04 23,597k 4,986k +46.33 1.e3
19/28 00:05 26,179k 5,018k +46.34 1.e3 g6 2.Qg4 c6 3.Qd4 f6 4.Qxa7 e5 5.Qb8+ Ke7 6.Qxb7 g5 7.Bd3 Ke6 8.Bxh7 f5 9.Qb8 f4 10.Nf3 d6 11.Nxg5+ Kf6
20/24+ 00:07 41,407k 5,225k +46.62 1.e3
20/30 00:10 57,433k 5,297k +46.70 1.e3 g6 2.Qg4 e6 3.Qf4 d6 4.Qa4+ Kf8 5.Qxa7 g5 6.Qxb7 g4 7.Qxc7 d5 8.Qb8+ Kg7 9.Qe5+ Kg8 10.Bd3 h6 11.Nc3 Kf8 12.Qh8+ Ke7
21/27 00:12 68,281k 5,330k +46.95 1.e3 g6 2.Qg4 a5 3.Qd4 e6 4.Qa7 c6 5.Qxb7 g5 6.Nf3 f6 7.Qc8+ Ke7 8.Qh8 g4 9.Qg7+ Kd6 10.Qxg4 a4 11.Qg7 Kc7 12.Qxf6 c5 13.Qf4+ Kb7 14.Qxa4
22/24 00:12 68,651k 5,324k +46.95 1.e3 g6 2.Qg4 a5 3.Qd4 e6 4.Qa7 c6 5.Qxb7 g5 6.Nf3 f6 7.Qc8+ Ke7 8.Qh8 g4 9.Qg7+ Kd6 10.Qxg4 a4 11.Qg7 Kc7 12.Qxf6 c5
23/26 00:13 70,901k 5,316k +46.95 1.e3 g6 2.Qg4 a5 3.Qd4 e6 4.Qa7 c6 5.Qxb7 g5 6.Nf3 f6 7.Qc8+ Ke7 8.Qh8 g4 9.Qg7+ Kd6 10.Qxg4 a4 11.Qg7 Kc7 12.Qxf6 c5 13.Qf4+ Kb7 14.Qxa4
24/32 00:18 98,785k 5,318k +47.09 1.e3 g6 2.Qg4 a6 3.Qb4 b5 4.Qc3 e6 5.Qxc7 Ke7 6.Qc8 g5 7.Qxa6 b4 8.Qb7 h5 9.Qxb4+ d6 10.Nc3 f5 11.Nb5 Kf7 12.Qxd6 h4 13.Nf3
25/28 00:21 111,509k 5,218k +47.23 1.e3 g6 2.Qg4 a6 3.Qb4 b5 4.Qc3 e6 5.Qxc7 Ke7 6.Qc8 g5 7.Qxa6 b4 8.Qb7 f5 9.Qxb4+ Ke8 10.Qd6 f4 11.Bb5 fxe3 12.Qxd7+ Kf8 13.dxe3 Kg8 14.Qxe6+ Kg7
26/32+ 00:28 143,440k 4,989k +47.52 1.e3
26/34 00:39 193,634k 4,844k +47.71 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f5 6.Qxg6 f4 7.exf4 Kd8 8.Nf3 Kd7 9.Qf5+ Kd8 10.Qe6 a5 11.Bd3 Ke8 12.Bg6+ Kd8 13.Ng5 c6 14.Nf7+ Kc7 15.Qxe7+ Kb6 16.Qd8+ Kc5 17.Nxd6
27/32+ 00:50 248,789k 4,950k +48.00 1.e3
27/33+ 01:02 314,695k 5,025k +48.28 1.e3
27/33 01:09 349,752k 5,049k +48.45 1.e3 g6 2.Qg4 c6 3.Qd4 e6 4.Qxa7 g5 5.Qxb7 g4 6.Qb8+ Ke7 7.Qb4+ d6 8.Qxg4 Kd7 9.Qg8 Ke7 10.Qxh7 e5 11.Nf3 e4 12.Qxe4+ Kd7 13.Qf5+ Ke7 14.Ng5 Kd8 15.Qxf7
28/36+ 01:18 397,475k 5,080k +48.73 1.e3
28/36 01:33 458,458k 4,898k +48.95 1.e3 h6 2.Qg4 g5 3.Qd4 e6 4.Qxa7 c6 5.Qxb7 g4 6.Qb8+ Ke7 7.Qb4+ Ke8 8.Qxg4 c5 9.Qg7 Ke7 10.Qxh6 c4 11.Nf3 d6 12.Bxc4 Kd7 13.Qf6 Kc6 14.Qxf7 e5 15.Nc3
29/36+ 01:47 518,630k 4,806k +49.24 1.e3
29/36 02:02 576,918k 4,711k +49.45 1.e3 h6 2.Qg4 g5 3.Qd4 e6 4.Qxa7 c6 5.Qxb7 g4 6.Qb8+ Ke7 7.Qb4+ Ke8 8.Qxg4 c5 9.Qg7 Ke7 10.Qxh6 c4 11.Nf3 d6 12.Bxc4 Kd7 13.Qf6 d5 14.Qxf7+ Kd6 15.Bb5 Kc5 16.Qxe6
30/36+ 02:12 615,802k 4,660k +49.74 1.e3
30/37+ 02:18 649,047k 4,679k +50.03 1.e3
30/38 02:23 675,293k 4,690k +50.05 1.e3 h6 2.Qg4 g5 3.Qd4 e6 4.Qxa7 c6 5.Qxb7 g4 6.Qb8+ Ke7 7.Qb4+ Ke8 8.Qxg4 c5 9.Qg7 Ke7 10.Qxh6 c4 11.Nf3 d5 12.Qg7 d4 13.Nxd4 c3 14.Nxc3 e5 15.Nd5+ Kd7 16.Qxe5
31/42+ 02:24 680,139k 4,692k +50.34 1.e3
31/42+ 02:25 684,120k 4,695k +50.63 1.e3
31/42+ 02:25 684,739k 4,695k +51.53 1.e3
31/42+ 02:25 684,784k 4,695k +52.08 1.e3
31/42+ 02:25 684,805k 4,695k +52.78 1.e3
31/42+ 02:25 684,955k 4,695k +53.61 1.e3
31/42 02:26 685,608k 4,695k +54.37 1.e3 h6 2.Qg4 g5 3.Qd4 e6 4.Qxa7 g4 5.Qxb7 c6 6.Qb8+ Ke7 7.Qb4+ Ke8 8.Qxg4 d5 9.Qg7 d4 10.exd4 Kd8 11.Qxf7 e5 12.dxe5 h5 13.Ba6 c5 14.e6
32/36+ 02:26 686,653k 4,695k +54.68 1.e3
32/36+ 02:26 687,279k 4,695k +54.99 1.e3
32/36+ 02:26 687,316k 4,695k +55.40 1.e3
32/36+ 02:26 687,612k 4,695k +55.93 1.e3
32/36+ 02:26 687,645k 4,695k +56.61 1.e3
32/36+ 02:26 687,887k 4,695k +57.49 1.e3
32/36+ 02:26 689,876k 4,695k +58.61 1.e3
32/36- 02:27 690,626k 4,695k +50.75 1.e3 g6
32/36+ 02:27 690,870k 4,695k +57.07 1.e3
32/36+ 02:27 691,479k 4,695k +59.33 1.e3
32/36+ 02:27 692,878k 4,695k +74.53 1.e3
32/40+ 02:27 693,796k 4,695k +78.20 1.e3
32/40 02:29 702,315k 4,695k +78.51 1.e3 g6 2.Qg4 c6 3.Qd4 e6 4.Qxa7 g5 5.Qxb7 g4 6.Qb8+ Ke7 7.Qb4+ Ke8 8.Qxg4 c5 9.Nf3 Kd8 10.Qf4 Ke7 11.Qh4+ Kd6 12.Qxh7 Ke7 13.Qg7 c4 14.Ne5 Kd6 15.Bxc4 Kc5 16.Qxf7
33/36+ 02:29 703,485k 4,695k +79.25 1.e3
33/36+ 02:29 703,560k 4,695k +80.26 1.e3
33/36+ 02:29 703,580k 4,695k +81.07 1.e3
33/36+ 02:29 703,765k 4,695k +82.07 1.e3
33/36- 02:30 707,908k 4,695k +59.90 1.e3 g6
33/39+ 02:31 709,317k 4,695k +81.07 1.e3
33/40+ 02:33 719,030k 4,694k +82.52 1.e3
33/40+ 02:33 720,389k 4,694k +84.38 1.e3
33/40+ 02:35 728,251k 4,694k +86.63 1.e3
33/40- 02:36 734,088k 4,695k +58.76 1.e3 h6
33/40+ 02:36 734,668k 4,695k +74.53 1.e3
33/40+ 02:36 734,696k 4,694k +79.25 1.e3
33/40+ 02:36 734,960k 4,694k +85.11 1.e3
33/40+ 02:43 761,461k 4,667k +92.18 1.e3
33/40- 02:45 770,230k 4,664k +51.88 1.e3 g6
33/40+ 02:45 770,655k 4,664k +78.11 1.e3
33/40+ 02:45 771,537k 4,663k +92.00 1.e3
33/44 03:01 838,364k 4,629k +94.25 1.e3 g6 2.Qg4 c6 3.Qd4 e6 4.Qxa7 g5 5.Qxb7 g4 6.Qb8+ Ke7 7.Qb4+ Ke8 8.Qxg4 c5 9.Qh4 c4 10.Bxc4 d5 11.Bb5+ Kf8 12.Nf3 d4 13.Qd8+ Kg7 14.Qg5+ Kf8 15.exd4 e5 16.Nxe5 h6 17.Qxh6+ Ke7 18.Qc6 f5 19.Qe8+ Kf6 20.Qg6+ Ke7
34/46+ 03:07 865,857k 4,617k +94.71 1.e3
34/46+ 03:08 871,124k 4,620k +95.18 1.e3
34/46+ 03:08 872,764k 4,621k +97.01 1.e3
34/46+ 03:08 873,030k 4,621k +97.88 1.e3
34/46+ 03:08 873,102k 4,621k +101.07 1.e3
34/46+ 03:09 875,267k 4,621k +103.95 1.e3
34/46- 03:09 877,350k 4,621k +93.75 1.e3 g6
34/46+ 03:09 877,851k 4,622k +99.66 1.e3
34/46+ 03:09 877,856k 4,622k +104.00 1.e3
34/46+ 03:10 878,182k 4,622k +149.07 1.e3
34/46 03:17 912,700k 4,616k +M43 1.e3 g6 2.Qg4 f6 3.Qd4 c6 4.Qxa7 e5 5.Qxb7 e4 6.Qc8+ Ke7 7.Qh8 h5 8.Qh7+ Kd8 9.Qxg6 Ke7 10.Qxh5 d5 11.Qh7+ Kd6 12.Qg6 Ke6 13.Qe8+ Kd6 14.Qd8+ Ke6 15.Qc7 f5 16.Qxc6+ Kf7 17.Qxd5+ Kf6 18.Qd6+ Kg7 19.Qe7+ Kh8 20.Qe5+ Kh7 21.Qxf5+ Kh6 22.Qf6+ Kh7 23.Qh4+ Kg7
35/50 03:41 1,026,100k 4,633k +M18 1.e3 g6 2.Qg4 a5 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f6 6.Qxg6 a4 7.Qf7 f5 8.Qxf5+ Kd8 9.Qe6 a3 10.Nxa3 c6 11.Nf3 Ke8 12.Nd4 Kd8 13.Nf5 Kc7 14.Qxe7+ Kb6 15.Nxd6 Ka5 16.Nac4+ Kb4 17.a3+ Ka4 18.b3+
36/38 03:45 1,046,918k 4,635k +M18 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 Ke8 6.Nf3 a5 7.Qg8+ Kd7 8.Qxf7 a4 9.Qxg6 a3 10.Nxa3 c6 11.Qf7 d5 12.Ne5+ Kd6 13.Qe8 Kc7 14.Qxe7+ Kb6 15.Qd8+ Ka7 16.Nd7 b5 17.Qb6+ Ka8 18.Qa6+
37/36 03:51 1,073,681k 4,629k +M18 1.e3 g6 2.Qg4 a5 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f6 6.Qxg6 a4 7.Qf7 f5 8.Qxf5+ Kd8 9.Qe6 a3 10.Nxa3 c6 11.Nf3 Ke8 12.Nd4 Kd8 13.Nf5 Kc7 14.Qxe7+ Kb6 15.Nxd6 Ka5 16.Nac4+ Kb4 17.a3+ Ka4 18.b3+
38/36 04:02 1,113,080k 4,591k +M18 1.e3 g6 2.Qg4 a5 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f6 6.Qxg6 a4 7.Qf7 f5 8.Qxf5+ Kd8 9.Qe6 a3 10.Nxa3 c6 11.Nf3 Ke8 12.Nd4 Kd8 13.Nf5 Kc7 14.Qxe7+ Kb6 15.Nxd6 Ka5 16.Nac4+ Kb4 17.a3+ Ka4 18.b3+
39/36 04:21 1,189,639k 4,545k +M18 1.e3 g6 2.Qg4 a5 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f6 6.Qxg6 a4 7.Qf7 f5 8.Qxf5+ Kd8 9.Qe6 a3 10.Nxa3 c6 11.Nf3 Ke8 12.Nd4 Kd8 13.Nf5 Kc7 14.Qxe7+ Kb6 15.Nxd6 Ka5 16.Nac4+ Kb4 17.a3+ Ka4 18.b3+
40/34 05:19 1,417,088k 4,441k +M17 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f6 6.Qxg6 b5 7.Nf3 c6 8.Qf7 f5 9.Qxf5+ Kc7 10.Qe6 Kb6 11.Qxe7 a5 12.Qxd6 Kb7 13.Ne5 a4 14.Qxc6+ Ka7 15.Qc7+ Ka8 16.Bxb5 a3 17.Bc6+
41/34 05:32 1,477,523k 4,448k +M17 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f6 6.Qxg6 b5 7.Nf3 c6 8.Qf7 f5 9.Qxf5+ Kc7 10.Qe6 Kb6 11.Qxe7 a5 12.Qxd6 Kb7 13.Ne5 a4 14.Qxc6+ Ka7 15.Qc7+ Ka8 16.Bxb5 a3 17.Bc6+
42/34 06:06 1,637,629k 4,465k +M17 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f6 6.Qxg6 b5 7.Nf3 c6 8.Qf7 f5 9.Qxf5+ Kc7 10.Qe6 a5 11.Qxe7+ Kb6 12.Qxd6 Kb7 13.Ne5 a4 14.Qxc6+ Ka7 15.Qc7+ Ka8 16.Bxb5 a3 17.Bc6+
43/34 07:02 1,892,855k 4,483k +M17 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f6 6.Qxg6 Ke6 7.Nf3 Kd7 8.Qg4+ Kd8 9.Qg8+ Kd7 10.Nd4 c6 11.Qe6+ Kc7 12.Qxe7+ Kb6 13.Nc3 Ka7 14.Nxc6+ Kb6 15.Nd8 a5 16.Qxb7+ Kc5 17.d4+
44/34 07:48 2,109,588k 4,504k +M17 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f6 6.Qxg6 Ke6 7.Nf3 Kd7 8.Qg4+ Kd8 9.Qg8+ Kd7 10.Nd4 c6 11.Qe6+ Kd8 12.Nf5 Kc7 13.Qxe7+ Kb6 14.Nxd6 c5 15.Qxb7+ Ka5 16.Qxa6+ Kb4 17.a3+
45/34 08:43 2,371,820k 4,527k +M17 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qh8+ Kd7 5.Qxh7 f6 6.Qxg6 Kd8 7.Nf3 Kd7 8.Qg4+ f5 9.Qxf5+ Kd8 10.Qe6 c6 11.Ng5 b5 12.Nf7+ Kc7 13.Qxe7+ Kb6 14.Nd8 Ka5 15.Qc7+ Ka4 16.b3+ Kb4 17.Ba3+
46/32 11:05 3,054,954k 4,588k +M15 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qa7 c6 5.Qxb7 Kf8 6.Qxc6 Kg7 7.Qd7 Kf6 8.Nc3 d5 9.Nf3 a5 10.Nxd5+ Kg7 11.Qxe7 g5 12.Nxg5 Kg6 13.Qxf7+ Kxg5 14.Qf6+ Kg4 15.Be2+
47/30 11:43 3,227,612k 4,591k +M15 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qa7 c6 5.Qxb7 Kf8 6.Qxc6 Kg7 7.Qd7 e6 8.Qxd6 a5 9.Nf3 g5 10.Qe7 g4 11.Ne5 a4 12.Qxf7+ Kh6 13.Nxg4+ Kg5 14.h4+ Kxg4 15.Be2+
48/30 13:24 3,660,153k 4,550k +M15 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qa7 c6 5.Qxb7 Kf8 6.Qxc6 Kg7 7.Qd7 e6 8.Qxd6 a5 9.Nf3 g5 10.Qe7 g4 11.Ne5 a4 12.Qxf7+ Kh6 13.Nxg4+ Kg5 14.h4+ Kxg4 15.Be2+
49/30 14:37 3,975,783k 4,531k +M15 1.e3 g6 2.Qg4 a6 3.Qd4 d6 4.Qa7 c6 5.Qxb7 Kf8 6.Qxc6 Kg7 7.Qd7 e6 8.Qxd6 g5 9.Qe7 g4 10.Nf3 e5 11.Nxe5 a5 12.Qxf7+ Kh6 13.Qf6+ Kh5 14.Be2 a4 15.Bxg4+