It is perfectly true, as the Professor said, that there is only one
solution (not counting a reversal) to this puzzle. The frogs that jump
are George in the third horizontal row; Chang, the artful-looking
batrachian at the end of the fourth row; and Wilhelmina, the fair
creature in the seventh row. George jumps downwards to the second tumbler
in the seventh row; Chang, who can only leap short distances in
consequence of chronic rheumatism, removes somewhat unwillingly to the
glass just above him--the eighth in the third row; while Wilhelmina, with
all the sprightliness of her youth and sex, performs the very creditable
saltatory feat of leaping to the fourth tumbler in the fourth row. In
their new positions, as shown in the accompanying diagram, it will be
found that of the eight frogs no two are in line vertically,
horizontally, or diagonally.
[Illustration]