Before or After

Put six events in order, earliest to latest. One date is given. Three tries.

• —Six events, in the order they happened — earliest at the top.
• —One date is already on the board. That card still moves.
• —Use the arrows on a card, or tap two cards to swap them.
• —Three tries. A wrong order tells you how many cards were in the right place and how many were not — never which ones.
• —Two hints are available, and each one turns over another date.

Where to start

Start from the date you were given and work outwards: everything you are sure came first goes above it, everything later below, and the events you cannot place go in the middle where they cost the least. Because a wrong guess tells you how many cards were right rather than which, the second try is worth more if the first one moves several cards at once: a single swap that changes the count by two has told you about both of them.