Should I replace the carats with the letter M, do you think?
Well, the name Mecklenbeck doesn't mean anything at all to me. If you're going to call various Pawns Mecklenbeck Pawns, you should explain what this means. I suppose you're trying to match the cards up with your piece notation. This would limit you to one case. As long as this is what you're trying to do, I recommend using Betza code or acronyms, depending on which is more appropriate for a piece, then disambiguating conflicts with short abbreviations or numbers. For some compounds, you might want to use the letters of the pieces compounded, such as RN and BN for the Chancellor and Archbishop. If a piece appears in a compound, the single letter acronym can be reserved for that piece or for the one most used in compounds, preferably in accordance with Betza code.
If you don't care about matching IDs with piece notation, you could use mixed case IDs to distinguish acronyms from abbreviations, or, since you're not placing values on the cards, you could even just use numbers, as the only use of the ID is as a handle for letting a player handle a card.
Well, the name Mecklenbeck doesn't mean anything at all to me. If you're going to call various Pawns Mecklenbeck Pawns, you should explain what this means. I suppose you're trying to match the cards up with your piece notation. This would limit you to one case. As long as this is what you're trying to do, I recommend using Betza code or acronyms, depending on which is more appropriate for a piece, then disambiguating conflicts with short abbreviations or numbers. For some compounds, you might want to use the letters of the pieces compounded, such as RN and BN for the Chancellor and Archbishop. If a piece appears in a compound, the single letter acronym can be reserved for that piece or for the one most used in compounds, preferably in accordance with Betza code.
If you don't care about matching IDs with piece notation, you could use mixed case IDs to distinguish acronyms from abbreviations, or, since you're not placing values on the cards, you could even just use numbers, as the only use of the ID is as a handle for letting a player handle a card.