Show piece identifiers for overlapped pieces

[mapto]

When 2 or more pieces are on the same position, the current console interface shows .2., .3. or .4.. With the standard game setup, there is one situation when this is not uniquely interpretable: when one player has all his 4 pieces overlapping in two positions. Then users see two .2. of the player's colour and can't know what exact pieces are in each of the two positions.

Please propose solution ideas before we engage in implementation.

[mapto]

One possible solution is instead of .2. for A and B being on a position, to show A.B. This is generalisable to ABC for 3 pieces.

Then, what do we do to show that all 4 pieces are on the same field? How about non-standard boards when a player could have more than 4 pieces?