Get Strong at Invading Mah jong A board is not included

A board is not included but we have pictured this set on an 20" Oriel board (sold separately)

2" squares (55mm)

here you need to fill both the cross and the triangle with all pieces

can you find both

Get Strong at Invading Mah jong A board is not includedThis material is presented in a problem format. Each problem is part of a series of problems in which various lines are explored. Short sequences of moves allow the reader to concentrate on one particular aspect of a problem without becoming confused through the analysis of long and complicated variations. Divided in three parts; standard invasions on the side of the board, invading the corners and attacking corner enclosures, and erasing large