D! Fence!

[green100b]

You are ahead of 2 hands he has (QQ,KK and semi-crushed by his likely other holdings (10's, jacks, AJ, AK, AA). I think it's likely he has KK with the king of diamonds though i havent played with jimmy long enough to know his level of spewing on the flop. I think your check is mediocre. You are good enough to know if he's checkraising you on air or if you need to improve to call the river. I think you can value bet the turn, if popped, call. Fold on the river if unimproved. Something i think you can also do, but need to do selectively, is 3 ball him on the turn if he checkraises you. You've seen me do this and it will typically freeze him on the river unless he has the uber-nutz in which case you can fold. He rarely will 4 ball you back on the turn and will most likely check the river and you can check bhind. Costs you the same as calling the C/R and calling the river unimproved. It also will freeze him in future hands from C/Ring you since he and the table have seen you 3 ball. So, it leads itself to positive draw value in the future as well. Obviously if he is holding AA he will likely 4 bet you. You have to go with your feel on this hand with him and I think your instincts tend to be in the right zone.