Game played on hollow board - has holes through which pieces fit with one set locked by bar and other set releasing them

摘要

The board game consists of a hollow support (1) whose upper face (2) is marked with squares which have holes (3) in the centre. The pieces go through the holes and one set (9) are locked by a bar (5) and another set (10) press against this to release the first set. The first set have an axial extension (9a) with a wider base (9b) on which a hook (5a) on the bar hooks. The other set (10) have extensions (10a) which are spherical at the bottom and press against a wider part (5b) of the bar to release it.