The player who correctly identifies the positions of the minerals (Tangram pieces) placed by the director wins. Players take turns starting with the player seated to the left of the director, proceeding clockwise.
On the solution sheet, there is a grid of 10 x 8 cells. Choose one of the numbers (1-18) or letters (A-R) along the outer edge of the grid to shoot an elastic wave. The elastic wave travels horizontally or vertically from the fired position, bouncing off each mineral at right angles or horizontally and vertically until it exits the mine.
The director must answer where the elastic wave exits and in what color. Upon hearing the answer, explorers record it on their solution sheets.
In Orapamine, there are 4 types of minerals (red, blue, yellow, transparent) and petroleum (black). The elastic wave fired is white, but upon colliding with minerals of color, the color of the elasticwave changes. It can mix colors as it collides with multiple minerals.
