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Charles' lossless notation
    Keywords: Joseki, SL description

Moved from Opening systematic classification.


Proposal: for a set of indexing systems to cover all 'opening positions' (really, positions on certain sub-boards with few stones).

Objective: an index that would make it easier to track down patterns, wherever they occur on SL. A search engine to match patterns may also become available in time, but that would be a complementary mechanism. For example, an index can make one aware of possibilities with which one wasn't familiar, a search engine starts from a pattern one already recognises as significant.

Form of suggestion: that joseki and other patterns should be given codes such as cAZAp, interpreted in this sort of way:

c denotes a corner pattern: there would also be side patterns s on a 19x10 sub-board;

cA indexes corner patterns based on the 4-4 point;

Z is reserved for tenuki, so that we assume alternating play as the default and mark tenuki explicitly;

cAZA would be the 4463 enclosure, cAZB the 4464 enclosure and so on;

letters p, q, r ... in lower case would represent middle game continuations (probes, invasions and so on), meaning that cAZAp can stand for the 3-3 invasion of the enclosure, cAZAq the 3-4 contact play and so on.

Charles Matthews


Comments here ...

My concern is that development and systematic application of this type of indexing system would tend to make SL incomprehensible to people familiar with the Go literature in general but not familiar with SL. Therefore I believe that we would end up with something more "average user" friendly if we were to concentrate on increasing the linking between existing pages and building more comprehensive index pages using the more familiar terminology used in other books. This is not nearly as compact as Charles' suggestion, but I personally think that it is more likely to make SL appealing to the majority of readers. --DaveSigaty



This is a copy of the living page "Charles' lossless notation" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.