// Before (2.1)
import { getClassicEngine, SudokuEngine, validateRow } from "@reetesh/sudoku-engine";
const e = getClassicEngine();
validateRow(board, 0);
new SudokuEngine({ seed: 1 }).generateBatch({ count: 10 });
 
// After (3.0)
import { createEngine, BatchEngine, validateBoard } from "@reetesh/sudoku-engine";
const e = createEngine({ variant: "classic" });
validateBoard(board);
new BatchEngine({ seed: 1 }).generateBatch({ count: 10 });

import { generatePuzzle, solve, validateBoard, createEngine } from "@reetesh/sudoku-engine";
 
generatePuzzle("medium");
solve(puzzle);
createEngine({ variant: "jigsaw" }); // still works

import { createEngine } from "@reetesh/sudoku-engine";
 
// Killer / Thermo / Kropki — persist and reattach meta
const killer = createEngine({ variant: "killer" });
const game = killer.generatePuzzle("easy")!;
killer.withMeta(game.metaConstraints!).solve(game.puzzle);
 
// Samurai — 21×21; inactive cells stay null
createEngine({ variant: "samurai" }).generatePuzzle("easy");

import {
  createEngine,
  defineVariant,
  BatchEngine,
  composeHouses,
} from "@reetesh/sudoku-engine";
 
const engine = createEngine({ variant: "samurai" });
createEngine({ definition: defineVariant({ /* … */ }) });
new BatchEngine({ variant: "6x6", seed: 42 }).generateBatch({ count: 8 });