Tiutchev ruled out of Ritz Tiutchev will miss this afternoon`s feature Ritz Club Ascot Chase after suffering a bout of colic.'He arrived at the races perfectly all right but he`s definitely got a form of colic and he`ll go back to the veterinary college,' the nine-year-old`s trainer Nicky Henderson said.Tiutchev would have been a hot favourite for the Stg#65,000 Ascot contest, which was due to be his last run before he tackled the Queen Mother Champion Chase at next month`s Cheltenham Festival.