Algebraic Square Color Checker
Conventional chessboard square color, a1 dark; no piece placement or position legality.
Description
Algebraic Square Color Checker: return square color.
Chessboard square colors alternate by file and rank. Algebraic notation gives those coordinates explicitly.
This tool returns square color. Use the stated units and model convention when interpreting these fields.
When to use this tool
Use this tool when the supplied inputs match the specific operation described above and you need a repeatable result under its stated convention.
- Check the supported input and output contract against an existing calculation or observation.
- Use the complete example to confirm units, selector spelling and result interpretation.
How to use the tool and how it works
- Enter every field in the input table using the stated units and the exact supported selector spelling where applicable.
- Run the tool. Correct input errors before interpreting an output.
- Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.
Require a lowercase square from a1 through h8. Add zero-based file and rank indices; an even sum is dark and an odd sum is light.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| square | Square. | Text |
| Output field | Interpretation |
|---|---|
| result | Object containing the following named result fields. |
| result.squareColor | Square color; use the stated units and sign convention. |
{
"input": {
"square": "a1"
},
"output": {
"result": {
"squareColor": "dark"
}
}
}Limitations and assumptions
- No chess position, piece legality or board orientation needs to be inferred for this parity check.
- Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
- Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.
Alternative or Complementary methods
Check the underlying observations, units and conventions independently before using the result in a larger workflow. The tools listed below address nearby tasks; compare their inputs and scope before substituting one for this operation.
References
Similar or alternative tools
- chess castling rights checker
Standard chess castling needs rights, an empty path and safe king start/transit/destination squares.
- chess en passant legality checker
Legal en passant requires the FEN target and a pawn capture that leaves the moving king safe.