itsutsu

Houseki 宝石: four original gem and stone puzzle games, Falling Triplets, Colour Chains, Stone Collapse and Gem Swap, as immutable seeded engines with 300 graded levels, plus experimental Magnetic Blocks. English and Japanese. Zero dependencies.

Tsunagi, a line-joining logic puzzle (Flow-style number link) for JavaScript and TypeScript: 2,368 hand-checked levels with one answer each, a solver, a seeded generator, walls, bridges, portals, hexagons and an SVG board. Zero dependencies.

Five hidden-rank strategy board games with immutable TypeScript engines and an English and Japanese pass-the-device player. Zero runtime dependencies.

Peg solitaire on nine classic, shaped, wide and tall boards. Immutable engine, seeded solvable challenges, configurable materials, SVG drawing and accessible English/Japanese play. Zero runtime dependencies.

Minesweeper on square, orthogonal, hexagonal and wraparound boards: four levels up to extra-hard, seeded games, a safe opening, verified no-guess boards, explained hints and a playable board for any page. Zero runtime dependencies.

Grid number and logic puzzles for JavaScript and TypeScript: Sudoku and its variants, Futoshiki, Skyscrapers, Kakuro, Slitherlink, Nurikabe and more. Typed engines, checked puzzles, SVG boards and bilingual players. Zero runtime dependencies.

Meikyuu 迷宮, mazes for JavaScript and TypeScript: squares, hexagons, triangles, circles and cut-out shapes, even a cube or a globe, made by seven algorithms from a seed and drawn through with a finger or the mouse. Zero dependencies.

Jarajara, mahjong tiles for JavaScript and TypeScript: the 144-tile set drawn as SVG, stacked layouts, free-tile and matching rules, and Awase, the matching solitaire, alone or at a table of two to four. Zero dependencies.

Bushu 部首, find a kanji by the parts it is made of: choose radicals and get every kanji that holds them all. The 253 radicals and their 6,355 kanji from RADKFILE, and a radical picker for any page, in English and Japanese. Zero dependencies.

Chizu 地図, maps for JavaScript and TypeScript: the world and 31 countries' regions from Natural Earth, named in English and Japanese, with zoom, insets, quiz helpers and a callout placer. Drawn as SVG in any page. Zero dependencies.

Sugoroku, backgammon and its variants for JavaScript and TypeScript: the rules, the doubling cube, match play, Long Gammon, Nackgammon and more, replayable games as text, a computer player, and an SVG board for any page. Zero dependencies.

Hikidashi 引き出し, a drawer of small Japanese text tools: era dates, kanji numerals both ways, dictionary forms of conjugated words, readings shared over kanji, words pulled from pasted text, and sentence difficulty. Zero dependencies.