Ataxx
Ataxx & Hexxagon are very interesting games but there doesn't seem to be any strategic element, merely tactics. However, on much bigger boards, there might be some strategy. This variant is a very large game of Hexxagon with a restricted progressive mutator (which speeds and adds depth to the game) and with a more mixed-up start (to allow more flexibility of directions).
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1344 HEXXAGON
Every move must be from stones already on the board at the start of the turn
=== abcdefghijklmnopqrstuvwxyzABCDEFG XXX OOO
x . . . x . . . o 1. v4 n6,m5p4,f6
. . . . . . . . . . 2.
. . . . . . . . . . . 3.
. . . . . o . . x . . . 4.
o . . . . . . . x . . . o 5.
. o . . . o . . . . . . . . 6.
. . . . . . . . . . . . . . . 7.
. . . . . . . . . . . . . . . . 8.
o . . . x . . . . . . . o . . . x 9.
. . . . . . . . . . . . . . . . 10.
. . . . . . . . . . . . . . . 11.
. . . . . . . . . . . . . . 12.
x . . . o . . . x . . . x 13.
. . . . . . . . . . . . 14.
. . . . . . . . . . . 15.
. . . . . . . . . . 16.
x . . . o . . . o 17.