385.--"STRAND" PATIENCE.

The reader may find a solution quite easy in a little over 200 moves,

but, surprising as it may at first appear, not more than 62 moves are

required. Here is the play: By "4 C up" I mean a transfer of the 4 of

clubs with all the cards that rest on it. 1 D on space, 2 S on space, 3

D on space, 2 S on 3 D, 1 H on 2 S, 2 C on space, 1 D on 2 C, 4 S on

space, 3 H on 4 S (9 moves so far), 2 S up on 3 H (3 moves), 5 H and 5 D

exchanged, and 4 C on 5 D (6 moves), 3 D on 4 C (1), 6 S (with 5 H) on

space (3), 4 C up on 5 H (3), 2 C up on 3 D (3), 7 D on space (1), 6 C

up on 7 D (3), 8 S on space (1), 7 H on 8 S (1), 8 C on 9 D (1), 7 H on

8 C (1), 8 S on 9 H (1), 7 H on 8 S (1), 7 D up on 8 C (5), 4 C up on 5

D (9), 6 S up on 7 H (3), 4 S up on 5 H (7) = 62 moves in all. This is

my record; perhaps the reader can beat it.

Amusements in Mathematics · 第 917 / 970 题