Bimbo ist entlaufen

Bimbo the monkey starts on a black space on one narrow side of the game board. The two keepers start on two black spaces on the opposite side. The monkey moves diagonally forward or backward. The Keepers may only move diagonally forward. To win the game, the monkey has to pass the keepers to escape. The keepers win, if they enclose the monkey, so it can't move anymore.