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Subject: Re: How long does it take your engine to find the mate in 4?

Author: Vincent Diepeveen

Date: 19:50:24 12/30/03

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On December 30, 2003 at 18:34:14, Andrew Williams wrote:

Ugh.

I learned to first ugh, run diep then comment how good or bad it is. Nice to
know you announce your mate in dutch by the way!

to honour you i did it in english!

00:00  35500 355 0 (1) 1 (0,0) 0.259 Rf7xe7 Qd8xe7 Bb5xd7 Ke8-d8
00:00  41700 417 0 (1) 1 (0,0) 0.260 Rf1-f2
00:00  62100 621 0 (1) 1 (0,0) 3.694 Rf1-e1
00:00  75700 2271 0 (1) 2 (0,1) 7.636 Rf1-e1 Qd8-b6 Qe6xb6 a7xb6 Re1xe7 Ke8-d8 R
e7xd7 Kd8-c8 Bb5xd3 Ra8xa2 Rf7xg7 Ra2xb2 Rg7xh7
00:00 111783 6707 0 (1) 3 (0,2) 7.636 Rf1-e1 Qd8-b6 Qe6xb6 a7xb6 Re1xe7 Ke8-d8 R
e7xd7 Kd8-c8 Bb5xd3 Ra8xa2 Rf7xg7 Ra2xb2 Rg7xh7
00:00 105188 9467 0 (1) 4 (0,3) 7.636 Rf1-e1 Qd8-b6 Qe6xb6 a7xb6 Re1xe7 Ke8-d8 R
e7xd7 Kd8-c8 Bb5xd3 Ra8xa2 Rf7xg7 Ra2xb2 Rg7xh7
00:00 122275 19564 0 (1) 5 (0,4) 7.636 Rf1-e1 Qd8-b6 Qe6xb6 a7xb6 Re1xe7 Ke8-d8
Re7xd7 Kd8-c8 Bb5xd3 Ra8xa2 Rf7xg7 Ra2xb2 Rg7xh7
00:00 114372 99504 0 (1) 6 (0,5) 7.636 Rf1-e1 Qd8-b6 Qe6xb6 a7xb6 Re1xe7 Ke8-d8
Re7xd7 Kd8-c8 Bb5xd3 Ra8xa2 Rf7xg7 Ra2xb2 Rg7xh7
00:02 113743 250235 0 (1) 7 (0,6) 8.753 Rf1-e1 Qd8-b6 Qe6xb6 a7xb6 Re1xe7 Ke8-d8
 Re7xd7 Kd8-c8 Rd7-c7 Kc8-b8 Rc7xb7 Kb8-c8 Bb5xd3 Ra8xa2 Rf7-c7 Kc8-d8 Rc7xg7
++ g1-h1 procnr=0 terug=8810 org=[8753;8754] newwindow=[8753;520000]
00:06 131164 821091 0 (1) 7 (0,6) MATE04 Kg1-h1 h7-h6 Rf1-e1 Ra8-c8 Rf7xe7 Qd8xe
7 Qe6xe7

Bummer 7 ply.

So perhaps dual it goes faster.

So now the 512 cpu:
time  nps        score
[snip]
05:00 10,023,453 Mate in 220 0 (512) 64 (0,2) MAT220 d2-d4 d7-d5 c2-c4 c7-c6
e4xd5 c6xd5

No sorry that was the openings position!



>On December 30, 2003 at 18:24:27, Jeff Hlywa wrote:
>
>>[D]r2qk2r/pp1nbRpp/4Q3/1B6/8/3p4/PPP3PP/5RK1 w kq - 0 17
>>
>>I came across this position in a blitz game tonight and missed the mate (playing
>>Rxg7 instead).  My engine (Bogo) takes a full a minute to see the mate:
>>
>>ply |   score |    time |     nodes |    qnodes | line
>>  1 |   -1.20 |    0.00 |        63 |       120 | cxd3
>>  2+|   -0.70 |    0.01 |       211 |      2770 | Re1
>>  2 |   -0.18 |    0.00 |       294 |      3582 | Re1 dxc2
>>  3+|    0.32 |    0.02 |      1382 |      6644 | Re1
>>  3 |    1.12 |    0.01 |      2015 |      8505 | Re1 d2 Qxe7+ Qxe7
>>  4 |    1.12 |    0.02 |      2574 |     11943 | Re1 d2 Qxe7+ Qxe7
>>  5+|    1.62 |    0.10 |     12127 |     29661 | Re1
>>  5 |    4.99 |    0.16 |     27376 |     57157 | Re1 Qb6+ Qxb6 axb6 Rexe7+
>>                                                  Kd8 Rxd7+ Kc8
>>  6 |    4.99 |    0.11 |     39122 |     80765 | Re1 Qb6+ Qxb6 axb6 Rexe7+
>>                                                  Kd8 Rxd7+ Kc8
>>  7 |    5.36 |    1.68 |    227701 |    386042 | Re1 Qb6+ Qxb6 axb6 Rexe7+
>>                                                  Kd8 Rxd7+ Kc8 Rc7+ Kd8 Rfd7+
>>                                                  Ke8
>>  8 |    5.36 |    1.21 |    373651 |    620391 | Re1 Qb6+ Qxb6 axb6 Rexe7+
>>                                                  Kd8 Rxd7+ Kc8 Rc7+ Kd8 Rfd7+
>>                                                  Ke8
>>  9+|    5.86 |   15.05 |   2168181 |   3291189 | Kh1
>>  9 |   Mat 4 |   41.57 |   7808070 |  11246013 | Kh1 dxc2 Rxg7 Rf8 Rxf8+
>>                                                  Kxf8 Qf7#
>
>
>Not very revealing without your hardware!
>
>Mine takes 67 seconds to see the mate-in-4. This is on an Athlon 1200:
>-----
> 6=  +6.71   00:00:02.16    328490   1.Re1 Qb6 2.Qxb6 axb6 3.Rexe7 Kd8
>                                     4.Rxd7 Kc8 5.Bxd3 Rxa2 6.Rxg7
> 7>  +6.71   00:00:02.24    338331   1.Re1 Qb6 2.Qxb6 axb6 3.Rexe7 Kd8
>                                     4.Rxd7 Kc8 5.Bxd3 Rxa2 6.Rxg7 Rxb2 7.Bxh7
> 7b  +7.01   00:00:07.60   1207802   1.Kh1 b6 2.Rf8 Rxf8 3.Rxf8 Kxf8 4.Bc4
> 7<  +7.02   00:00:08.81   1408593   1.Kh1
> 7=  +7.01   00:00:08.81   1408593   1.Kh1 b6 2.Rf8 Rxf8 3.Rxf8 Kxf8 4.Bc4
> 8>  +7.01   00:00:09.03   1437417   1.Kh1 Rc8 2.Bxd7 Qxd7 3.Rxe7 Qxe7
>                                     4.Qxc8 Qd8 5.Re1 Kf7 6.Qe6 Kf8 7.Rf1 Qf6
>                                     8.Rxf6 gxf6 9.cxd3
>SCRUBBING TT: 501       [+904]  901
> 8<  +M01   00:00:50.24   8133867   1.Kh1
> 8=  +M04   00:01:07.58  11097047   1.Kh1 Rc8 2.Rxg7
> 9>  +M04   00:01:23.50  13899570   1.Kh1 Rc8 2.Rxg7 Rf8 3.Rxf8 Kxf8 4.Qf7
> 9<  +M03   00:01:32.85  15776764   1.Kh1
> 9=  +M04   00:01:32.85  15776764   1.Kh1 Rc8 2.Rxg7 Rf8 3.Rxf8 Kxf8 4.Qf7
>10>  +M04   00:01:32.86  15777362   1.Kh1 Rc8 2.Rxg7 Rf8 3.Rxf8 Kxf8 4.Qf7
>10<  +M03   00:01:55.31  20340333   1.Kh1
>10=  +M04   00:01:55.31  20340333   1.Kh1 Rc8 2.Rxg7 Rf8 3.Rxf8 Kxf8 4.Qf7
>11>  +M04   00:01:55.32  20340931   1.Kh1 Rc8 2.Rxg7 Rf8 3.Rxf8 Kxf8 4.Qf7
>
>NODES per second 178700
>-----
>
>Andrew



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