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Q: I have seen where there are letter-number combinations designating specific squares on chessboards. I will appreciate your explaining how this system works.
A: There are actually two systems one descriptive, and one geometric. The geometric grid is more commonly used, but I personally prefer the descriptive.
In the geometric, each square is given a grid designation:
Each type of piece has its own designation:
P = pawn
1. d2-d4, Ng8-f6
This has the white pushing out his queen pawn two squares and black responding with his king's knight.
I think that this gives you the gist of it.
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