Double Check achievement in Fritz - Don't call me a chess bot

Since double check is an instant win, is this a loss for white

What are Double Check and Discovered Check in chess?

Improve Chess Tactics - Burn the Enemy

How To Think During A Chess Game - Next Level Chess By GM Noël Studer

Build: Fundamentals, Ch. 5: Double check

Double Check achievement in Chess Ultra

Operation Double Check by Catson, Amos

The chess mystery, solved Fabulous adventures in coding

What does double-check mean in four-player chess on chess.com

The game Reti vs. Tartakower 1910 has one of the most powerful double checks ever! Have you ever used a double check to win a game of chess?, By ChessKid.com