s = blinkers
b = cheekpieces
j = tongue strap
D = Disqualified
S = Did not start
Z = The horse was stopped
DD = Disq. (was not on the distance when the winner crossed the finish line)
DJ = Disqualified (rider got the race course wrong)
PN = Horse fell, did not finish
SN = Went off track
ZN = Jockey fell, did not finish