StatHighCardOnFlop is a stat, not property.

we can't do
select * from hands where StatHighCardOnFlop = 1 limit 100
to find all A-high boards we can do
select * from hands where (boardcard1 = 0 or boardcard1 = 13 or boardcard1 = 26 or boardcard1 = 39 or boardcard2 = 0 or boardcard2 = 13 or boardcard2 = 26 or boardcard2 = 39 or boardcard3 = 0 or boardcard3 = 13 or boardcard3 = 26 or boardcard3 = 39) limit 100
it's already long query and it becomes 3 times longer if we would find K/Q-high boards using this property