As Bruce said, Daedalus and Junkyard Dog were the pawns. Chess matches usually open with pawns being advanced, to free up the other pieces to move and seek advantageous positions. In this case, it seems like Anarky was trying to distract Batman so he could be in position to rig the bombs on the trams. Given that D & JD mentioned going to the rendezvous point and later showed up at the wheelhouse, I'd assume that Anarky intended for Batman to scare them into retreat and follow them to the wheelhouse, whereupon Anarky would confront him and do the tram-bomb-trap thing. But Batman anticipated his moves and got ahead of him.