227.--CENTRAL SOLITAIRE.

Here is a solution in nineteen moves; the moves enclosed in brackets

count as one move only: 19-17, 16-18, (29-17, 17-19), 30-18, 27-25,

(22-24, 24-26), 31-23, (4-16, 16-28), 7-9, 10-8, 12-10, 3-11, 18-6,

(1-3, 3-11), (13-27, 27-25), (21-7, 7-9), (33-31, 31-23), (10-8, 8-22,

22-24, 24-26, 26-12, 12-10), 5-17. All the counters are now removed

except one, which is left in the central hole. The solution needs

judgment, as one is tempted to make several jumps in one move, where it

would be the reverse of good play. For example, after playing the first

3-11 above, one is inclined to increase the length of the move by

continuing with 11-25, 25-27, or with 11-9, 9-7.

Amusements in Mathematics · 第 737 / 970 题