https://tabandblank.com/blog/ Tab and Blank Blog en Sun, 01 Nov 2026 22:46:56 +0000 https://tabandblank.com/blog/minesweeper/ https://tabandblank.com/blog/minesweeper/ Sun, 01 Nov 2026 00:00:00 +0000 No known inventor; TechRadar, Eurogamer and the game's own author disagree. Then 1990, Windows, world records — and a genuine NP-complete theorem. https://tabandblank.com/blog/nim/ https://tabandblank.com/blog/nim/ Sun, 01 Nov 2026 00:00:00 +0000 Nobody can date Nim's origin — but its winning strategy has a birthday: 1901, Charles Bouton, Harvard. Our computer opponent runs that theorem every turn. https://tabandblank.com/blog/manual-kakuro/ https://tabandblank.com/blog/manual-kakuro/ Wed, 21 Oct 2026 00:00:00 +0000 Kakuro rules and controls: fill a digit crossword so every run adds to its clue with no repeats — arithmetic deduction, newspaper heritage. https://tabandblank.com/blog/manual-nurikabe/ https://tabandblank.com/blog/manual-nurikabe/ Wed, 21 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/manual-slitherlink/ https://tabandblank.com/blog/manual-slitherlink/ Wed, 21 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/recorrido-del-caballo/ https://tabandblank.com/blog/recorrido-del-caballo/ Wed, 21 Oct 2026 00:00:00 +0000 A thousand years of the knight's tour: Sanskrit verse, Euler, the 1823 rule of Warnsdorff — and the tool that still uses it to photograph our own game. https://tabandblank.com/blog/solucion-unica/ https://tabandblank.com/blog/solucion-unica/ Wed, 21 Oct 2026 00:00:00 +0000 The WPC rulebook demands exactly one solution per puzzle. We opened our own generator code and asked every engine what it actually guarantees. https://tabandblank.com/blog/tipos-wpc/ https://tabandblank.com/blog/tipos-wpc/ Wed, 21 Oct 2026 00:00:00 +0000 The World Puzzle Championship is not one game but a bestiary of pencil-and-paper types. Here is the map by family — and where our 120-game catalog sits on it. https://tabandblank.com/blog/manual-akari/ https://tabandblank.com/blog/manual-akari/ Tue, 20 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/manual-creek/ https://tabandblank.com/blog/manual-creek/ Tue, 20 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/manual-cryptarithmetic/ https://tabandblank.com/blog/manual-cryptarithmetic/ Tue, 20 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/manual-hashiwokakero/ https://tabandblank.com/blog/manual-hashiwokakero/ Tue, 20 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/manual-hex/ https://tabandblank.com/blog/manual-hex/ Tue, 20 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/manual-knights-tour/ https://tabandblank.com/blog/manual-knights-tour/ Tue, 20 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/manual-masyu/ https://tabandblank.com/blog/manual-masyu/ Tue, 20 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/manual-peg-solitaire/ https://tabandblank.com/blog/manual-peg-solitaire/ Tue, 20 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/manual-pipe-puzzle/ https://tabandblank.com/blog/manual-pipe-puzzle/ Tue, 20 Oct 2026 00:00:00 +0000 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. https://tabandblank.com/blog/manual-sudoku/ https://tabandblank.com/blog/manual-sudoku/ Tue, 20 Oct 2026 00:00:00 +0000 The rules of Sudoku step by step, the strategies that actually solve a board and every control — mouse, keyboard and gamepad. Deduction, not luck. https://tabandblank.com/blog/manual-thermometers/ https://tabandblank.com/blog/manual-thermometers/ Tue, 20 Oct 2026 00:00:00 +0000 Thermometers: raise the mercury from each bulb, satisfy the row and column counts. Full rules, strategies and controls for this logic puzzle. https://tabandblank.com/blog/baraja-espanola/ https://tabandblank.com/blog/baraja-espanola/ Fri, 16 Oct 2026 00:00:00 +0000 Coins, cups, swords and clubs: how the Spanish-suited deck kept its medieval pips for over six centuries, and why Klondike still works with it.