The answer is extremely simple: leave talk of values for domestic consumption, and engage with Russia on basis of interests - anyway, Russia already believes that 'values' are just a hypocritical cover for 'interests', so the switch would be easy.

You would be amazed how many specialists in game theory Russia has, and how well - but honestly - they could play games with clearly defined rules. On the other hand, hearing that 'e2-e4' is disproportionate this morning but was OK yesterday once too often, might lead to the aggrieved side leaving the table and moving to another board and another game.

Russia would be really, really, loath to do so, but that's what would happen if its interests are not taken into account because European values prevent it.