No. XXVI.—CHESS CAMEO
By Dr Gold
A Chess Joke

BLACK

WHITE

Black has made an illegal move. He must replace this, and move his king as the penalty. White then mates on the move.

[Solution]

[1]SHOT IN A PYRAMID

Here is a method for determining the total number of balls in a solid pyramid built up on a square base:—

Multiply the number of shot on one side of the base line by 2, add 3, multiply by the number on the base line, add 1, multiply again by the number on the base, and finally divide by 6. Thus, if the base line is 12—

12 × 2 + 3 = 27; 27 × 12 + 1 = 325; 325 × 12 = 3900; and 3900 ÷ 6 = 650, which is the required number.