"If a sloop enters from any of the following starting positions, using just the one token shown to enter the whirlpool, then the whirlpool will move the sloop in this pattern."@en . . . "If a sloop enters from any of the following starting positions, using just the one token shown to enter the whirlpool, then the whirlpool will move the sloop in this pattern."@en . . "Whirlpool movement"@en . .