Chrono

Chrono is a free history game in the browser. Every day it draws a set of events from a database of several hundred, and every player gets the same six. The FAQ is open about how they are picked: at random, so some days put events only a few years apart and feel much harder than others. Players can suggest new events through a form linked on the site.

The events appear as a list of cards with no dates. You drag them into order, earliest at the top, and press Check Answers. Events in the right place are marked, and you rearrange the rest. You have three tries: solve it on the first and you earn gold, on the second silver, on the third bronze. A clock runs while you play, so your result also has a time, and the stats page tracks medals, win rate, average and fastest time and your streak. A win unlocks a bonus game with an earlier set of events.

The main game has three sister dailies on the same site, each with its own set and streak: Chrono U.S.A. with events from American history, and Chrono NFL and Chrono NBA, which use five events from football and basketball history. A Practice mode, where you match events to their dates, can be played as often as you like.

Unlike Chronle, where each move counts, Chrono lets you reorder freely and only counts the checks, and the timer gives quick solvers something to chase. It suits history buffs who like a short daily test, and the NFL and NBA versions give sports fans a timeline game of their own.