WTF is Hnafltafl ? Does Raul know?
Hnafltafl (King's Table) is an early precursor of chess. It's like Skaflttafl only Skaflttafl simulates a naval sea battle whilst in Hnafltafl the king's enemies (the black army) who outnumber his white defenders at least two to one lay siege the the white king's castle. To win white must manouver the king safely off the table whilst black must take the king out.
This link explains most of it but omits a few rules. Standard official rules include that once he has departed his castle, the king may not reenter it nor pass through it but must go around it. If a piece intentionaly moves between two oposing pieces it is not taken (because it went berserk and rushed to hold them off rather than them ganging up on it, the foe cannot kill you during your own turn).
Whils he is in his castle the king is safe. However, when his back's against the wall the castle counts as an oposing piece for the purpose of taking the king. In a harsh rules variant the castle and all the table edges count as another piece for the purpose of taking pieces.
Raoul may know of it. It is occassionaly played in Drechanon but is more popular in the northlands.