[Tutor] 15 puzzle

[alan.gauld@bt.com]

> How old is 2.0 now? 8 months? We can't keep giving 1.5.2 
> solutions forever

Normal commercial vendor arrangements is to support the last 
2 versions thus on the next major release(ie 2.2?) we could 
drop "support" for 1.5 (assuming 1.6 doesn't count!)

OTOH Many companies including mine will not upgrade more than 
once per year and then only to the (current - 1) version. Thus 
the most recent version of Python I can use is 1.5.1 and we won't 
upgrade till July, probably to 2.0...

So on that basis we should offer support for at least 1 
calander year after a version is superceded.

Given the pace of change in open source software I'd favour 
the later option.

Just my two cents,

Alan G