\input zb-basic
\input zb-matheduc
\iteman{ZMATH 1999c.01886}
\itemau{Kai, Lam Tao; Hui, Tan Chong}
\itemti{Pick-up marbles and bead-up abacus.}
\itemso{Math. Medley 25, No. 2, 75-79 (1999).}
\itemab
Two games are described. 1. Pick-up Marbles. This is a simple paper-and-pencil game for two persons. The second game is named Bead-up Abacus. Suppose we have an abacus with only two rods and some beads on them. The beads can only occupy uniformly spaced positions on the rods. Each player alternately moves a bead up the rod by one position. A bead cannot be moved if either another bead is directly on top of it or it has already hit the top of the abacus. Any player who cannot make a move loses.
\itemrv{~}
\itemcc{H40}
\itemut{}
\itemli{}
\end