An alpha-numerical code identifies 48 blocks of 6 cells, delineated by thicker grid bars. Each block's code is attached to the baseline of its centre-bottom cell, letters representing rows and numbers representing columns.
An alpha-numerical code identifies 48 blocks of 6 cells, delineated by thicker grid bars. Each block's code is attached to the baseline of its centre-bottom cell, letters representing rows and numbers representing columns.
An alpha-numerical code identifies 48 blocks of 6 cells, delineated by thicker grid bars. Each block's code is attached to the baseline of its centre-bottom cell, letters representing rows and numbers representing columns.