[Other] 4PC Numeric Notation

I've devised 4PC notational system that can be used in international correspondance should anyone have a need for it.

It is modelled on the ICCF numeric notation. 4PC numeric notation is not meant for prevalent use but is there in case there is a need for it. Like the ICCF numeric notation, 4PC numeric notation does away completely with the problems of language bias. The notation itself is based upon the conventionally accepted hexadecimal number system - this has been done to simplify the numerical strings that would have occurred using base 10.

Each rank and file of the board is assigned a number (1-E) from Red's perspective. The squares of the board are thus assigned unique coordinates like so:

A move is defined by pairing two of these two-digit coordinates together to make a string of 4 digits. For example, the move 1. h3 (1 r. h3) in algebraic notation would be written as 1. 8283 in 4PC numeric notation.

Indicating which player is to move follows the conventions of the Numerical-position indication method... So 1. - c7 (1 b. c7) would be written as 1. - 2737. Similarly, Yellow's placement is represented by two hyphens and Green by 3.

Neither the type of moving piece nor the piece captured are specifically marked in 4PC numerical notation - all moves except for pawn promotion and resignation consist of 4 digits.

In pawn promotion a fifth digit must be added: "1" for Queen (or 1 point Queen), "2" for Rook, "3" for Bishop, "4" for Knight.

For castling the King starting and end position are recorded:

Red Kingside - 81A1
Red Queenside - 8161
Blue Kingside - 181A
Blue Queenside - 1816
Yellow Kingside - 7E5E
Yellow Queenside - 7E9E
Green Kingside - E7E5
Green Queenside - E7E9

When a player resigns, the move is record simply with the number F.

this is confusing

Yes very, don't worry about it though, it's not meant to be conventionally used. It's more just there in case anyone needs it - an alternative if you will.

ok

4e should be 41, and b1 should be be, you don't normally start the numbering from the bottom up right? That's why I feel it's confusing.

Yeah its a little wierd, I modelled it almost precisely on the ICCF model which starts (on a 2pc board) in the bottom left corner, so I followed the same orientation in order to keep consistent. Don't worry, I promise you the vast majority of us will lever have to use this.