Difference between revisions of "Computer Composition Searches"
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| Cambridge Surprise Major || >=5000 changes<br>Tenors together<br>Snap finishes<br>Bob = 14, Single = 1234 || 15,416 compositions || 13 days<br>PC<br>SMC32||1998 || Graham John||See [http://www.changeringing.co.uk/cambridgefm.htm Cambridge - The Full Monty] | | Cambridge Surprise Major || >=5000 changes<br>Tenors together<br>Snap finishes<br>Bob = 14, Single = 1234 || 15,416 compositions || 13 days<br>PC<br>SMC32||1998 || Graham John||See [http://www.changeringing.co.uk/cambridgefm.htm Cambridge - The Full Monty] | ||
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| + | | Cambridge Surprise Major || >=5000 changes<br>Tenors together<br>Round blocks<br>Bob = 14, Single = 1256 || 152,915 compositions<br>3,739,182 rotations || 47 days<br>P90 PC<br>SMC32||2010||Mark Davies|| | ||
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| Bristol Surprise Maximus || 5000-5100 changes<br>Tenors together<br>Round blocks<br>Bob = 14, Single = 1234 || 202,384,361 compositions || 47 hours<br>PC<br>SMC32||1998 || Mark Davies||<br> | | Bristol Surprise Maximus || 5000-5100 changes<br>Tenors together<br>Round blocks<br>Bob = 14, Single = 1234 || 202,384,361 compositions || 47 hours<br>PC<br>SMC32||1998 || Mark Davies||<br> | ||
Revision as of 20:23, 14 July 2010
A computer can be a useful tool to search for compositions, yet even with today's fast processors exhausting many composition searches is too big a task. This page has been created to keep a record of searches people have successfully completed in popular methods. If you have completely exhausted a computer search for compositions, please add an entry to the table below, stating any constraints you applied to the search, when you first ran it, and any other information you think would be of interest.
Exhausted Composition Searches
| Method | Search Constraints | Results | Time/ Computer/ Program |
Date | Run by | Notes |
|---|---|---|---|---|---|---|
| Cambridge Surprise Major | >=5000 changes Tenors together Round blocks Bob = 14, Single = 1234 |
9,997 compositions 255,138 rotations |
9 days P90 PC SMC 1:42:30 2.2GHz Athlon X2 SMC32 1:03:04 3.2GHz Phenom X4 SMC32 |
1995 2005 2010 |
Graham John Mark Davies Simon Humphrey |
See Cambridge - The Full Monty |
| Cambridge Surprise Major | >=5000 changes Tenors together Snap finishes Bob = 14, Single = 1234 |
15,416 compositions | 13 days PC SMC32 |
1998 | Graham John | See Cambridge - The Full Monty |
| Cambridge Surprise Major | >=5000 changes Tenors together Round blocks Bob = 14, Single = 1256 |
152,915 compositions 3,739,182 rotations |
47 days P90 PC SMC32 |
2010 | Mark Davies | |
| Bristol Surprise Maximus | 5000-5100 changes Tenors together Round blocks Bob = 14, Single = 1234 |
202,384,361 compositions | 47 hours PC SMC32 |
1998 | Mark Davies | |
| Yorkshire Surprise Maximus | 5000-5100 changes Tenors together Round blocks Bob = 14, Single = 1234, Big Bob=18 |
202,927,179 compositions | 5 days, 23 hours PC SMC32 |
1998 | Mark Davies | |
| Plain Bob Minor | 720 changes Bob = 14, Single = 1234 |
1,440,339,152 compositions | 18:16:25 2.8GHz i7-860 SMC32 |
2010 | Mark Davies |
Composing Program Benchmark
The "Full Monty" search for compositions of Cambridge Surprise Major is a useful benchmark both for measuring the efficiency of composing programs and the computers they run on. As shown in the table above, the first time this was completed was in 1995 using SMC on a Pentium 90, taking 9 days. The current record for this search is one hour, three minutes, and four seconds run by Simon Humphrey using SMC32 on a Phenom X4 3.2 GHz in 2010. It should be possible to improve on this significantly using a multi-threaded program on a modern multi-processor PC. If you beat it, please update this page.
