The movement's message of "Scotland for the people" offers the best chance of winning over those alienated from politics.
To triumph against the odds, the Yes campaign needs fear of a Conservative government and permanent austerity to push voters towards independence.
Despite the party's by-election success, all the signs still point towards another SNP-controlled parliament in 2016.
This time next year we’ll know which campaign Scots disliked the least.
For the first time since August 2011, the nationalist side takes the lead by 44 to 43 per cent.
Scots are not engaged, as they were in the 1970s, in a debate about how best to utilise North Sea assets.
The closer the contest is, the more likely radical changes to the devolution settlement become.
The current constitutional settlement is unsustainable.
Salmond’s plan to reduce Scotland's corporation tax rate to 3 per cent below that of the UK is politically and economically incoherent.
If Alex Salmond’s opponents are feeling confident, they shouldn’t be. In a rare print interview, the SNP leader takes aim at Nigel Farage, the bedroom tax and Scottish Labour – and reveals his plan to guarantee every young person a job.