Win / draw / loss

The engine's probability estimate for each result, per mille.

Stockfish can translate a centipawn score into expected win, draw and loss rates for the side to move, calibrated on engine games. A +50 cp position might be 25% win, 70% draw, 5% loss. It is more intuitive than centipawns for displaying to players and is on by default in this API (options.show_wdl).

Example

+0.2

curl JavaScript Python

curl -s https://stockfishapi.com/v1/eval \
  -H "Authorization: Bearer $STOCKFISH_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"fen":"rnbqkb1r/pppppppp/5n2/8/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq - 2 2","depth":14}'

const res = await fetch("https://stockfishapi.com/v1/eval", {
  method: "POST",
  headers: { Authorization: `Bearer ${process.env.STOCKFISH_API_KEY}`, "Content-Type": "application/json" },
  body: JSON.stringify({
    "fen": "rnbqkb1r/pppppppp/5n2/8/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq - 2 2",
    "depth": 14
  }),
});
const data = await res.json();

import os, requests

r = requests.post(
    "https://stockfishapi.com/v1/eval",
    headers={"Authorization": f"Bearer {os.environ['STOCKFISH_API_KEY']}"},
    json={
        "fen": "rnbqkb1r/pppppppp/5n2/8/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq - 2 2",
        "depth": 14
    },
)
data = r.json()