The only other known numbers which fulfil these conditions are 496; 8128; 33,550,336; 8,589,869,056; 137,438,691,328; and 2,305,843,008,139,952,128. This most remarkable rarity of perfect numbers is a symbol of their perfection.
No. XXXIV.—CHESS CAMEO
By Emil Hoffmann
BLACK
WHITE
White to play, and mate in two moves. There are no less than twelve variations!
No. XXXV.—CHESS CAMEO
By J. Pospicil
A Prize Problem
BLACK
