Swap
From HexWiki
The rule
After Red played the first move Blue player is asked wether she wants to swap or not, that is to invert the colors or to keep on this way. Detailled article.
Where to swap
The use of the swap rule is to force the first player to play not too good moves. Therefore it is intersting to find out what are the moves that should be swapped (the best moves), what are moves that should not be swapped (the worse moves), what are the moves for which no answer is known yet.
On every size a1, b1 and symmetrical moves are known losing moves.
The red marked hexes are not to be swapped.
Size 4
Size 5
Size 6
Size 7
External links
A more complete site with solution to sizes 7 beware, the colors are inverted, vertical is blue there.