CHRONO

Build a timeline. It starts with one event and its year; six more are dealt one at a time, with no year, and you put each where it belongs.

• Drag the card into the gap it belongs in — earlier at the top, later at the bottom — and let go. Or tap the gap, then Place here: two taps, so a stray thumb is never a mistake.
• Right, and it slots in green with its year. Wrong, and it slides to its true place, red — so the line is always correct, and a miss still teaches.
• Every card makes the gaps tighter. The first card has two places to go; the sixth has seven. The dock says how close the day’s closest two events are.
• Your score is the share of the six cards you placed first time, out of 100 — about 17 a card.

One puzzle a day. Your scores are kept — Statistics is in the menu — and Chrono sits outside the daily line-up, so it never moves your day’s total.