itsutsu

Tsunagi: a line-joining logic puzzle (Number Link / Flow) for JavaScript and TypeScript, with 1,792 levels, each with exactly one answer. Zero dependencies.

Hikidashi 引き出し: a drawer of small Japanese text tools. Era dates, kanji numerals, verb dictionary forms, readings over kanji, pasted-text extraction, sentence difficulty. Zero dependencies.

Backgammon and its variants for JavaScript and TypeScript: the rules, doubling cube and match play, Nackgammon, Long Gammon, Hypergammon, Tabula, replayable games as text, a computer player, and a board you can play in any page. Zero dependencies.

Mahjong tiles for JavaScript and TypeScript: the 144-tile set drawn as SVG, stacked layouts, the free rule, seeded deals that can always be cleared, and Awase, the matching solitaire, alone or at a table. Zero dependencies.

A maze game of a thousand levels: draw a line through mazes in every shape with a finger or the mouse, with zoom, arrow puzzles and mixed ones. TypeScript, no dependencies.

Maps for JavaScript and TypeScript in English and Japanese: the world and 31 countries' regions from Natural Earth, names for 238 countries, framing and zoom, a quiz, and a callout placer with leader lines that never cross. SVG drawing and a map to drag and zoom. Zero dependencies.

Find a kanji by the parts it is made of: the multi-radical lookup for JavaScript and TypeScript. 253 radicals and 6,355 kanji from RADKFILE, the shapes people see, Japanese school names, kanji strokes, and a radical picker as a call or a tag. Zero dependencies.

Grid number puzzles for JavaScript and TypeScript: Sudoku (4×4 to 16×16), Jigsaw, Diagonal and Killer Sudoku, Futoshiki and Skyscrapers. Seeded puzzles with exactly one answer, a solver, an O(cells) check, a hint that says why, SVG drawing, and a playable board as a call or a tag. Zero dependencies.