Moves
Place1 stone
Put a stone on an empty node.
Secure1 stone
Guard one of your stones for this turn. If nobody attacks it, the Secure stone goes to the Box.
Capture2 stones
Take an empty node or an enemy stone. Your second stone goes to that stone's owner.
Same Node
Same move
Both moves fail. Red ring.
Secure beats Capture
The Capture fails; the Secure stone comes back. Gold ring.
Capture beats Place
The Place fails. Gold ring.
Rings
Gold ring
That stone can never be captured. Three at most each.
Red ring
The node is locked: nobody may target it next turn.
Ring 3
No Place over an enemy anchor. A Ring 3 stone over an enemy anchor is severed: it goes to the Box.
Scoring
Largest group
1 point per stone. Other stones score nothing.
Rays
5 points per spoke in that group with your stones on all three rings.
Up to two stones a turn. A failed move's stones go to the Box, apart from a Capture's second stone.