This is similar to the missionaries and cannibals problem, in which three missionaries and three cannibals must cross the river, with the constraint that at any time when both missionaries and cannibals are standing on either bank, the cannibals on that bank may not outnumber the missionaries.
Ini mirip dengan masalah misionaris dan kanibal, dimana tiga misionaris dan tiga kanibal harus melintasi sungai, dengan permasalahan bahwa saat para misionaris dan kanibal berada di suatu tepi, para kanibal di tepi tersebut tak boleh mengalahkan jumlah para misionaris.