Gamebox

Gamebox began as a fan recreation of The Economist's daily Inboxes, a Shikaku on an 8 by 12 grid, and grew into a hub of newspaper-style logic puzzles. Shikaku asks you to split the grid into rectangles that each hold one number equal to their area. Battleships is solitaire Bimaru: find a hidden fleet on a 10 by 10 grid from the ship counts on each row and column, with no two ships touching. Train Tracks lays one unbranching line between two stubs on the border using row and column counts, and Kakuro fills runs of cells with digits 1 to 9 that add up to the clue at their start.

Each game's daily challenge takes its seed and difficulty from the UTC date, so every player gets the same board, and a Play a past puzzle button opens earlier days. Every puzzle is generated and then checked to have a single solution. Leaving a daily only pauses it, and the hub's stats page adds up your totals, time spent and a streak across all the games.

Play needs no account, though signing in with Google or GitHub carries progress across devices. It suits players who want several classic logic puzzles a day in one quiet place, and anyone who liked Inboxes and wants more of it.