He also says that he thinks that there are only two ways to avoid default

Obama has to overcome his intrinsic protestant stinginess and shell out for at least $20 billion. Soros made all the calculations long ago. There is no other way out to save his puppets. It’s a trick-or-treat dilemma exacerbated by European fatigue from never ending financial demands of the Ukraine.))
Soros Says Russia in Ukraine Poses Threat to EU Existence - Bloomberg

And he also predicts that Russia would actually push Ukraine to default and that's the goal of Putin
Putin’s goal is a regime change that will be totally unacceptable for Obama, like the Right sector or some other outright neo-nazi. And imminent default is a definite step toward the direction. Pro-Russian government is improbable in the foreseeable future due to many obvious reasons.