Chess Move Validator Skill

Overview

Supports all standard algebraic notation including castling (O-O, O-O-O), pawn moves, piece moves, captures, checks, and checkmates.

Live Test Chess Move Validator Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as ChessMoveValidatorSkill. It is read-only and open-world — it fetches and never mutates anything on your side — so most clients call it without asking you to confirm.

Tool call

{
  "name": "ChessMoveValidatorSkill",
  "arguments": {
    "move": "Nf3"
  }
}

You do not name the tool yourself; the model picks it. Asking about Nf3 in the terms this skill covers is enough for it to reach for ChessMoveValidatorSkill on its own — naming it explicitly also works, and is the way to force the call.

Connecting

One server URL covers every skill in the catalog, including this one. Authorization is OAuth: the client opens a browser once, and there is no key to paste into a config file.

{
  "mcpServers": {
    "vervekit": {
      "url": "https://api.vervekit.com/v1/mcp"
    }
  }
}

Per-client setup — Claude, Cursor, VS Code, ChatGPT — is on the MCP setup page.

Arguments

These are the properties on the tool's inputSchema, so a well-behaved client validates them before the call is made. Premium arguments are accepted on every plan but only take effect on plans that include them.

Argument	Type	Description
`move`Required	string	Chess move in algebraic notation

What the model gets back

The result carries a structuredContent object matching the tool's declared outputSchema, so a client reads fields without parsing prose. status is "ok" and error is null on success; a null field means the value was not available for that input, not that the call failed.

Result

{
  "status": "ok",
  "error": null,
  "data": {
    "move": "Nf3",
    "valid": true,
    "type": "piece move",
    "piece": "N",
    "capture": false,
    "check": false,
    "checkmate": false,
    "promotion": false
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`move`	string	`Nf3`	The validated chess move in algebraic notation format
`valid`	boolean	`true`	Whether the move follows proper algebraic notation rules
`type`Premium	string	`piece move`	Classification of move type such as piece move or castling
`piece`Premium	string	`N`	The chess piece that moved in single letter notation
`capture`Premium	boolean	`false`	Indicates whether the move captures an opponent piece
`check`Premium	boolean	`false`	Indicates whether the move puts opponent king in check
`checkmate`Premium	boolean	`false`	Indicates whether the move results in checkmate condition
`promotion`Premium	boolean	`false`	Indicates whether the move involves pawn promotion

Failure modes

Errors come back as tool errors carrying a sentence the model can act on, not a bare status code. Error handling covers the full list.

Status	What it means
`400` / `422`	The arguments did not validate. The message names the offending one.
`401`	The OAuth session is invalid or expired — reconnect the server.
`403`	Blocked by a key restriction or an IP allow-list. Never a bad identity.
`404`	This skill is not part of VerveKit. Check the catalog.
`429`	Out of credits, or a brief rate limit. The message tells them apart.

A call costs 2 credits each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.

Use cases

Chess Applications: Validate user input in chess applications and games
Move Recording: Verify chess move notation for game recording and analysis systems
Notation Parsing: Parse and validate algebraic chess notation for chess engines
Game Analysis: Analyze chess notation in game databases and training applications

Other ways to use Chess Move Validator Skill

Set up Chess Move Validator Skill on VerveKit, or reach the same source a different way. Your VerveKit account and credits work on all of them — one key, one balance.

Call it as a REST APIOne HTTPS endpoint and an x-api-key header, with SDKs for Node, Python and .NET.APIVerve →Reference →