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SmartGo™ 1.5 User Manual
Appendix
80
The following properties store the move motives:
· MO: A text property that stores the move motive.
· MM: A text list property that stores all move motives.
To store pattern restrictions, the following properties define lists of points that can't be empty, black, or
white.
· QE: Not empty.
· QB: Not black.
· QW: Not white.
To store the search tree of a proof number search, the following integer properties are defined:
· PN: Proof number.
· DN: Disproof number.
In addition, SmartGo can read and write SGF files by using standard Go coordinates, to make it easy
to edit files by hand. See SGF with Standard Coordinates 76 .
SmartGo reads some of the SGF diagram extensions used by GoWrite and converts them to proper
FF[4] diagram properties.
The following property makes it possible to significantly shrink the size of game collections:
· S: Sequence of alternating moves starting with a black move, without any other properties. See
Compressed Game Collections 80 for more information. Note that this property replaces a number of
nodes, and thus changes the structure of the SGF file, so this property is only written in SGC files.
6.3
Compressed Game Collections
SGF is a relatively compact format, but when dealing with thousands of games, it wastes mega-bytes
on your hard disk, and makes it slower to download game collections. We've implemented a simple
way to reduce the size of SGF files for games that mainly consist of moves, not a lot of other
properties. Since this format is not completely compatible with SGF, we're using the SGC extension for
such files.
In SGF, a sequence of moves is represented as follows:
;B[m1];W[m2];B[m3];W[m4];B[m5];W[m6];B[m7];W[m8];B[m9]
(9 x 6 = 54 characters)
In an SGC compressed file, this is written as:
;S[m1m2m3m4m5m6m7m8m9]
(4 + 9 x 2 = 22 characters)
The savings are even more significant for longer files. We hope other authors writing Go programs will
consider supporting this simple compression scheme.
6.4
System Requirements
Platform:
Windows 95 (with IE 4.0), Windows NT 4.0, Windows 98, Windows Me, Windows 2000, or Windows
XP. Internet Explorer 5.0 or later recommended.
RAM memory:
· SmartGo: 32 MB of RAM.
· Games: 10000 games take about 35 MB of RAM, so lots of RAM is recommended for large game
collections.
Tip: To reduce memory requirements, turn off "Smoothly rounded stones" in Board Graphics 36 .
© 2002-2004 Smart Go, Inc. All rights reserved.