One event shows its year. The other keeps it hidden.
Did the hidden one happen before or after? Tap Before or After. On a keyboard, use the arrow keys.
Right, and the chain moves on. One wrong answer ends the run. Gaps get tighter as you go.
Daily is one chain, the same for everyone, and it goes until you get one wrong. One go per day, so share your score and see who gets furthest. A new one unlocks at midnight Irish time. Play every day to build your streak.