Some collections of randomly generated PGN game files

[sje]

Some collections of randomly generated PGN game files just for you.

Here are the gzip versions of random PGN game collections with 1, 10, 100, 1K, 10K, and 100K games.

These can be useful for testing a PGN parser and game termination identification code. Each game has appropriate values for all PGN tags including the Termination tag.

https://dl.dropboxusercontent.com/u/316 ... rg1.pgn.gz
https://dl.dropboxusercontent.com/u/316 ... g10.pgn.gz
https://dl.dropboxusercontent.com/u/316 ... 100.pgn.gz
https://dl.dropboxusercontent.com/u/316 ... 000.pgn.gz
https://dl.dropboxusercontent.com/u/316 ... 000.pgn.gz
https://dl.dropboxusercontent.com/u/316 ... 000.pgn.gz

Sizes (compressed):

Code: Select all

-rw-r--r--@ 1 sje  staff      1707 May 16 02:25 rg1.pgn.gz
-rw-r--r--@ 1 sje  staff      8594 May 16 02:26 rg10.pgn.gz
-rw-r--r--@ 1 sje  staff     90550 May 16 02:26 rg100.pgn.gz
-rw-r--r--@ 1 sje  staff    865555 May 16 02:26 rg1000.pgn.gz
-rw-r--r--@ 1 sje  staff   8685618 May 16 02:27 rg10000.pgn.gz
-rw-r--r--@ 1 sje  staff  86508026 May 16 02:36 rg100000.pgn.gz

Sizes (uncompressed):

Code: Select all

-rw-r--r--@ 1 sje  staff       3386 May 16 02:25 rg1.pgn
-rw-r--r--@ 1 sje  staff      20167 May 16 02:26 rg10.pgn
-rw-r--r--@ 1 sje  staff     235747 May 16 02:26 rg100.pgn
-rw-r--r--@ 1 sje  staff    2292827 May 16 02:26 rg1000.pgn
-rw-r--r--@ 1 sje  staff   23044160 May 16 02:27 rg10000.pgn
-rw-r--r--@ 1 sje  staff  229739008 May 16 02:36 rg100000.pgn

The average compression factor is about 62.3%.

[Look]

[...]

The average compression factor is about 62.3%.

AFAIK the best format for compression is .zipx ; But I do not know any windows freeware that would compress files to it. (Though some freewares would open it.)

[matthewlai]

[...]

The average compression factor is about 62.3%.

AFAIK the best format for compression is .zipx ; But I do not know any windows freeware that would compress files to it. (Though some freewares would open it.)

zipx is just WinZIP's special container format that's seldom used (http://kb.winzip.com/kb/entry/7).

XZ/LZMA2 is the best actual compression method from the list of algorithms supported in zipx.

You can use LZMA2 in 7z format, and it's an open format much better supported by many free and open source programs on all OSes.

[sje]

I've used gzip because it's well supported and it plus its pals have been included by default in every Unix-like system for many years.

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For those authors who have written a PGN parser, it might be interesting to compare speed benchmarks for a digestion of the 219 MiB rg100000.pgn file.

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If a randomly selected move has a 10% chance of being reasonable, then in a 100,000 collection of random games only about one of those games will have its first six moves be reasonable. The phrase "Shakespeare from monkeys on typewriters" comes to mind.