Abaddon vs Chen
Quick answer
Abaddon has the edge over Chen in Dota 2, winning +1.6% more often head-to-head.

Abaddon
+1.6% vs Chen · Soft edge
No spell in Abaddon's kit is a specific answer to Chen; any edge here comes from results, not a hard counter.
All counters to Chen
Chen
-4.1% vs Abaddon
No spell in Chen's kit is a specific answer to Abaddon; any edge here comes from results, not a hard counter.
All counters to AbaddonHead-to-head figures are public-match results; a spell answer only counts as a proven counter once it also wins clearly.
Try it in the live drafter