# Bingo   [Introduction]

There are two persons (A) and (B) needed.

[What is needed]

As illustrated below, you should write in 25 cells created on a square divided by four vertical/horizontal lines. [Preparation]

Twenty five figures should be written in the cells. As illustrated below, the order to write in should be at random as you like. [Game]

Here is described when you are (A).
Either player can run first and here is described when (A) runs first. (A) should declare one figure for example "3" among "1" through "25" figures. (A) should write in a check mark on "3" on which in turn (B) should write in a circle mark. Next, if (B) declares for example "10", then (A) should write in a circle mark on "10" on which in turn (B) should write in a check mark. Either player declares figures each other, and if four circle marks are filled in any horizontal/vertical /diagonal line (not always continuous marks), (A) should declare "Reach".
In another case where four circle marks are filled in any horizontal/vertical /diagonal line, (A) should again declare "Reach". If five (continuous) circle marks have been written in any line, then (A) declare "Bingo" to become a winner of the game. Japanese sites Mathematical Formulas| Kodawari House| Pinpoint StreetView|