• Click a node to navigate to that position

• Click background to add a new move from selected node

• Right-click the last placed node to delete it

• Right-click an arrow to rule out that line (right-click again to restore)

• Drag the ✔ from the right palette onto an arrow to mark your single best move

• Drag the ½ badge onto a leaf node to mark the position as drawn

• Draw arrows on the board to build variations

• — null move: passes the turn to explore opponent threats