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USA Football was promoted by President Theodore Roosevelt despite
opposition in academia for its brutality. Touchdowns counted for five
points and field goals four in those days. One hundred years ago teams had
three downs to make ten yards. Previously they had two downs to make five
yards. Passes were legal, but incomplete ones drew penalties of up to 15
yards. So the game stayed mainly on the ground of the field 110 yards
long, which still is 110 in Canada. Forget Soccer, far and away preferred,
for convenience. There could be untold thousands of variations of
''football,'' by altering field size, downs, points, number of
players, substitutions, time periods, all in different combinations taken. In fact sandlot football, or basketball, or baseball, may well be played hundreds of different ways within neighborhoods. 
By logic and melding of conflicting interests, we want next-Chess threads
to resolve into 2, or 5, or up to 50 sustainable forms, not proliferating
unduly. It will take two years. (A previous analogy under Chessboard Math,
similar to this football one, was to professional Badminton, with its one or two
standardized Olympic forms.) Whatever is arrived at, certain websites
chosen will take it from there.