only restriction that a red and a white counter may never stand at once
on the same straight line. Thus the first move can only be from 1 or 2
to 3, or from 9 or 10 to 7.

[Illustration:

4 8
/ \ / \
2 6 10
\ / \ /
3 7
/ \ / \
1 5 9

]


327.--A NEW BISHOP'S PUZZLE.

[Illustration:

+---+---+---+---+
| b | b | b | b |
+---+---+---+---+
| | | | |
+---+---+---+---+
| | | | |
+---+---+---+---+
| B | B | B | B |
+---+---+---+---+