Games & Entertainment
Chess FEN, PGN & Elo Rating Tutor
Parse & validate FEN board snapshots, PGN/SAN movetext (with parity, check/mate counts, threefold); compute Elo rating updates from win/draw/loss results, with Lichess/Chess.com tier bands
html· HTML resultOpen tool
Quick start
Call this tool from your code in three languages.
cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/chess-fen-pgn-elo-rating-tutor' \
-H 'Content-Type: application/json' \
-d '{"mode":"fen","fen":"rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1","pgn":"PGN movetext, e.g.\n1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 1/2-1/2","playerRating":0,"kFactor":32,"games":"One per line: opponentRating then result.\n1609 loss\n1477 win\n1388 win\n1586 win\n1720 loss"}'API reference
Send a POST request with your inputs as JSON. File parameters require a separate upload first.
Endpoint
HTTP
POST https://api.elysiatools.com/en/api/tools/chess-fen-pgn-elo-rating-tutorParameters
| Name | Type | Required | Description |
|---|---|---|---|
| mode | select | No | — |
| fen | textarea | No | — |
| pgn | textarea | No | — |
| playerRating | number | No | — |
| kFactor | number | No | — |
| games |
MCP integration
Add this tool to your Model Context Protocol server so AI agents can list and call it.
Server configuration
Add this block to your MCP client configuration:
mcp.json
{
"mcpServers": {
"elysiatools-chess-fen-pgn-elo-rating-tutor": {
"name": "chess-fen-pgn-elo-rating-tutor",
"description": "Parse & validate FEN board snapshots, PGN/SAN movetext (with parity, check/mate counts, threefold); compute Elo rating updates from win/draw/loss results, with Lichess/Chess.com tier bands",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=chess-fen-pgn-elo-rating-tutor",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}List available tools
After connecting to the SSE endpoint, list the exposed tools:
tools/list
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Call this tool
Invoke the tool by its id, passing arguments built from its parameters:
tools/call
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "chess-fen-pgn-elo-rating-tutor",
"arguments": {
"mode": "fen",
"fen": "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
"pgn": "PGN movetext, e.g.\n1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 1/2-1/2",
"playerRating": 0,
"kFactor": 32,
"games": "One per line: opponentRating then result.\n1609 loss\n1477 win\n1388 win\n1586 win\n1720 loss"
}
}
}Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).