Full trade is:
Shattenkirk (39% retained) and Phoenix Copley to Washington for 2017 1st round pick, Zach Sanford, Brad Malone and conditional 2019 2nd. STL gets that 2019 2nd if the Caps reach the conference finals and Shattenkirk plays in 50% of their games. There is also a third conditional pick...if Washington trades Shattenkirk before 7/1, then STL gets a 7th. If Washington gets higher than a 4th for him then STL's pick would be 2 rounds lower than that pick. So if the Caps get a 3rd; STL gets a 5th.
My head hurts.