Place No. 1 on C. Place No. 1 on L. " " 2 " R. " " 2 " C. " " 1 " R. " " 1 " C. " " 3 " C. " " 3 " L. " " 1 " L. " " 1 " R. " " 2 " C. " " 2 " L. " " 1 " C. " " 1 " L. " " 4 " R. " " 4 " C. " " 1 " R. " " 1 " C. " " 2 " L. " " 2 " R. " " 1 " L. " " 1 " R. " " 3 " R. " " 3 " C. " " 1 " C. " " 1 " L. " " 2 " R. " " 2 " C. " " 1 " R. " " 1 " C. Four are now And the riddle is solved. transferred. 31 moves. Place No. 5 on C. _The Nine Disks_ No absolute rule would apply to all positions, which makes this game more fascinating. The following solution of one random placing of the disks will illustrate the general process. To simplify explanation we will designate the counters as follows. The gray counter with the square we will call G.s., the one with a triangle G.t., and the one with the circle G.c. W.s., etc., for the white disks, and B.s., etc., for the black, placed at random on the following spots. On spot No. 1 place B.c. On spot No. 6 place W.t. " " " 2 " B.t. " " " 7 " B.s. " " " 3 " W.c. " " " 8 " G.t. " " " 4 " G.s. " " " 9 " G.c. " " " 5 " W.s. With the above arrangement of the disks the solution is as below: Move G.c. from 9 to 10. Move G.s. from 4 to 2. " G.t. " 8 " 9. " B.c. " 6 " 4. " W.t. " 6 " 8. " W.s. " 5 " 6. " B.c. " 1 " 6. " B.c. " 4 " 5. " W.c. " 3 " 1. " G.t. " 9 " 4. " B.t. " 2 " 3. " G.c. " 10 " 9. _The Soldiers and Guards_ Before beginning to select the men for his escort, Bright-Wits arranged the thirty men in a circle, the black spots representing his own men. Then he began to count with the man marked A. [Illustration] _Doola's Game_ The key to this puzzle lies in following these two rules: 1. After moving a counter, one of the _opposite colour_ must invariably be passed over it. 2. After having passed one counter over another, the next move will be with a counter of the colour of the first one moved. After the ninth move, the nest will be with one of the same colour. Beginning with the white counters the moves are: [Illustration] 1. D. moves into space 4. 2. C. passes over D. into space 5. 3. B. moves into space 3. 4. D. passes over B. into space 2. 5. E. passes over C. into space 4. 6. F. moves into space 6. 7. C. passes over F. into space 7. 8. B. passes over E. into space 5. 9. A. passes over D. into space 3. 10. D. moves into space 1. 11. E. passes over A. into space 2.