well. we would win...but it'll be very very bloody. seoul can be hit from the dmz....hard to imagine any system that could stop a majority of rounds from 1000s of guns. no, the only way to spare seoul would be a preemptive massive instantaneous strike on the n k front lines...probably tac nuke...this sounds like hell...but victory is essential
So, this would be the salvation of Seoul? /pun
Anyhow, would setting off nukes on NK's end of the DMZ produce effects that Seoul/Incheon would not want. Such as an excessive dose of radiation, or a blast wave.