I think in such a situation the higher ranked piece should be prohibited from continuous attack. As is the case with continuous attack by white on the edge in tablut, the spirit of "draw" is contravened by one player forcing the other's moves.
(peida) Hoia oma kirjakast puhas, arhiveerides tähtsad sõnumid ja kustutades regulaarselt kõik sissetulevad sõnumid. (pauloaguia) (näita kõiki vihjeid)