The block in which the above post is included has a merkle root of 5126e5e5ebde788be90502d202572fc07e8e4e7f.
To find the winner we:

1. Convert the merkle root into base 10:
   5126e5e5ebde788be90502d202572fc07e8e4e7f = 463295707705939277019686276167079823695414185599.
2. Compute the residual after dividing by the number of tickets: 463295707705939277019686276167079823695414185599 mod 903 = 225.
3. This is the winning ticket, held by @skepticology.

Congratulations!