What is a Double Check in Chess?

What does double-check mean in four-player chess on chess.com? - Chess Stack Exchange

Improve Chess Tactics - Burn the Enemy

The exciting world of achievements in Fritz 19

chess double check

Double Check - Learn to Play Chess, Chess Lessons for Beginners

Double Check Chess Move Description Poster or Canvas Wall Art

How often do you get a double check with en passant? - Chess Forums - Chess .com

In this position, black chose to ignore the double check and played 1Rxa5. What is the evualation now? : r/chess

CHAPTER 6 DOUBLE CHECKS Diagram 157 - White checkmates in 1 move!