Kakuro: Rules, Strategy and Controls — a Player's Manual
Kakuro rules and controls: fill a digit crossword so every run adds to its clue with no repeats — arithmetic deduction, newspaper heritage. Read more
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Kakuro rules and controls: fill a digit crossword so every run adds to its clue with no repeats — arithmetic deduction, newspaper heritage. Read more
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Nurikabe rules and controls: shade the sea, size every island to its number, keep the water in one piece and never let it pool in a 2×2 square. Read more
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Slitherlink rules and controls: one closed loop along a dot grid, where every number 0-3 counts how many of its box's four edges the loop uses. Read more
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Akari (Light Up) rules and controls: place bulbs so every free cell glows, no bulb shines on another, and each numbered wall gets exactly its count. Read more
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Creek is a shading puzzle where the numbers sit on the crossings, not in the cells — and every free cell must connect. Rules, strategies and controls. Read more
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Cryptarithmetic rules and controls: decode every letter to a unique digit, make the sum add up for real, and get mileage out of your three hints. Read more
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Hashiwokakero rules and controls: give every island exactly as many bridges as its number, keep the whole network connected, and spend your five hints well. Read more
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Hex rules, controls and strategy in one page: how the connection game works, how the built-in AI scales with difficulty, and why a draw is impossible. Read more
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Knight's Tour rules and controls: visit every square exactly once with L-shaped jumps, survive with all 36 numbers placed, and learn Warnsdorff's classic trick. Read more
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Masyu rules and controls: draw one closed loop through every pearl — black pearls force the turn, white pearls demand the straight — on grids up to 7×8. Read more
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Peg Solitaire rules and controls for the 33-hole English board: how jumps work, why a win needs exactly 31 of them, and the strategies the cross rewards. Read more
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Pipe Puzzle rules and controls: rotate every tile back into one leak-free network, use your three hints well, and pick the board size from 5×5 to 11×11. Read more
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The rules of Sudoku step by step, the strategies that actually solve a board and every control — mouse, keyboard and gamepad. Deduction, not luck. Read more
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Thermometers: raise the mercury from each bulb, satisfy the row and column counts. Full rules, strategies and controls for this logic puzzle. Read more