Chess
The Chess cipher is a substitution cipher that uses a chessboard-like grid to encode letters and numbers. The table uses automatically generated keys with rows labeled A-G and columns labeled 0-9, similar to chess notation. Each character in the alphabet is placed in the grid, and the alphabet repeats to fill the entire board.
The cipher uses an extended alphabet including A-Z and 0-9 (36 characters total). If the grid size exceeds the alphabet length, the alphabet wraps around to fill the grid.
Encoding
- Each character is placed in a cell of the grid (rows labeled A-H, columns labeled 1-8).
- To encode a letter, find its row and column in the table.
- Combine the row and column keys to form the encoded symbol.
- Repeat for every character in the message.
- H →
D3 - E →
A3 - L →
D7 - O →
C2
Decoding
- Split the encoded message into grid coordinates
- Look up each pair in the table using row (A-H) and column (0-7) keys
- Replace with the corresponding letter
Example
Input: HELLO WORLD
Encoded: D3 A3 D7 H3 C2 | C1 G7 B6 D7 D8
Decoded: hello world