Who has got who over a barrel? G7 leaders are pushing the idea of capping the price they pay for Russian oil and gas, effectively forcing Moscow to choose whether to supply at a discount or cut off the revenue stream of its pipelines.
As energy prices soar at the outset of the summer travel season, we ask our panel who blinks first and whether Moscow's gains on the ground in eastern Ukraine are at all offset by sanctions that have now triggered Russia's first debt default since the 1990s.
