Thanks for that. Nice.
The D5 thing has remained a brain twister, open to interpretation. Yours is new to me and is the VERY most sensible, given the broad affection for the term 3D Chess going on.
Count me in.
It’s a guess.
It goes with a Q reference to ‘On Guard’, which appeared near D5.
There is an old school of chess player that will say ‘On Guard’ when the Queen is threatened.
You may as well say ‘Check’, because typically there are only two times you threaten the Queen:
1. You put a Queen in a ‘fork’ (one piece threatens two big pieces at the same time). They generally have to move the Queen to save it, but they lose a Bishop or a Knight, say.
2. You’re about to put someone in checkmate, and you’re moving their Queen out of position.
‘On Guard’ then D5 could mean ‘We control the board, and are ready for endgame’.
Seems reasonable to me.
I don’t assume it is correct, but I like this interpretation...
D is fourth letter of the Alphabet / 4
+ 5
45 = POTUS!
:)