In an extraordinary day at the Badminton horse trials in Britain, only 35 combinations from an original 82 starters are left in the competition, after a gruelling cross-country phase.
Riders had to battle strong winds and rain with an unprecedented number of falls, eliminations, withdrawals and retirements.
Andrew Nicholson of New Zealand, Mary King (UK) and Francis Whittington (UK) were among those forced to retire.
Paul Tapner of Australia, riding Kilronan, leads on 56.4 penalty points going into Sunday's showjumping.
Tim Price (Ringwood Sky Boy) of New Zealand is second after starting the day at 41st.
Pascal Leroy of France on Minos de Petra, is in third place.
In 10th place is Lucy Jackson of New Zealand on Willy Do.
Sir Mark Todd is down to one horse, Leonidas, and has slipped from 9th to 17th.