The first major championship of the 20th Washington International Horse Show boiled down to a numerical battle between spiff and Polish and Fun and games, green working hunters who never faced each other during the three days of competition but finished in that order yesterday for the Claire Lang Miller Challenge as grand titlist of the division.

SPiff and Polish, Mrs. Ernest Schultness' 8-year-old gray mare handled by Leslie Burr, racked up 14 points among the first-year group. Fun and Games scored 13 in the second-year group. Fun and Games, an extremely smooth-working 5-year-old chestnut gelding was ridden by Charlie. Weaver for owner Mrs. Sylvester Johnson. Green working hunters are hunters of any age who are in their first or second year of show competition.

Neither won the final stake class of its age group. The second year stake was taken by the Dwyer Hill Farms' Another Brother, gaining the reserve tricolor for its effort. The winner was ridden in the class by Ian Millar, the Canadian aquestiran who had tied for first in Tuesday's Puissance. Reserve among the first-year group went to the Famille Farms' Spring Snow, ridden by Lu Thomas.

The coveted Eisenhower Memorial Trophy will highlight tonight's program. It opens at 7:30 with the regular conformation hunter stake for the Shenandoah Challenge Trophy. During the afternoon, an international open accumulator class will be run.