Monochrome shapes in black-and-white
There are shapes of one colour that have names, and then a question about how many stones of the other colour one can add and still usefully apply the name.
We know that the empty triangle must be empty!
We can only call this black formation an empty triangle if there is no white stone at the circled point.
We would only call this a bamboo joint in case both circled points are empty.
In general, it seems, there are some covert 'rules' about the sensible matching of patterns with shape names.
Sebastian: What about the knight's move - do the squared points have to be empty?
But there seems to be a kind of madness associated with definitions. Why not ask what it's all for, as well?
Imagist I played something along the lines of in a handicap game, not ten minutes after telling my opponent about empty triangles being bad. My opponent said, "Hey, isn't that bad?"
Trontonic My impression is that empty triangles are only okay when closing off territory and/or with extensive reading (of course). I tried playing without them and found that to be the place were they were actually good moves.
fractic: That's more a case of bad shape being mostly irrelevant during endgame. In the endgame all that counts is points, since all groups are settled bad shape is less of an issue.