Tab and Blank Bloghttps://tabandblank.com/blog/2026-11-01T22:46:56ZMinesweeper: Murky Origins, One Famous Windowhttps://tabandblank.com/blog/minesweeper/2026-11-01T00:00:00Z2026-11-01T00:00:00ZNo known inventor; TechRadar, Eurogamer and the game's own author disagree. Then 1990, Windows, world records — and a genuine NP-complete theorem.RedaccionNim: The Pile Game With a 1901 Theorem Insidehttps://tabandblank.com/blog/nim/2026-11-01T00:00:00Z2026-11-01T00:00:00ZNobody can date Nim's origin — but its winning strategy has a birthday: 1901, Charles Bouton, Harvard. Our computer opponent runs that theorem every turn.RedaccionKakuro: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-kakuro/2026-10-21T00:00:00Z2026-10-21T00:00:00ZKakuro rules and controls: fill a digit crossword so every run adds to its clue with no repeats — arithmetic deduction, newspaper heritage.RedaccionNurikabe: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-nurikabe/2026-10-21T00:00:00Z2026-10-21T00:00:00ZNurikabe 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.RedaccionSlitherlink: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-slitherlink/2026-10-21T00:00:00Z2026-10-21T00:00:00ZSlitherlink 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.RedaccionThe knight that crossed the whole boardhttps://tabandblank.com/blog/recorrido-del-caballo/2026-10-21T00:00:00Z2026-10-21T00:00:00ZA 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.RedaccionWhy Our Puzzles Have a Single Solutionhttps://tabandblank.com/blog/solucion-unica/2026-10-21T00:00:00Z2026-10-21T00:00:00ZThe WPC rulebook demands exactly one solution per puzzle. We opened our own generator code and asked every engine what it actually guarantees.Redaccion299 ways to reason: a map of the World Puzzle Championshiphttps://tabandblank.com/blog/tipos-wpc/2026-10-21T00:00:00Z2026-10-21T00:00:00ZThe 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.RedaccionAkari (Light Up): Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-akari/2026-10-20T00:00:00Z2026-10-20T00:00:00ZAkari (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.RedaccionCreek: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-creek/2026-10-20T00:00:00Z2026-10-20T00:00:00ZCreek 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.RedaccionCryptarithmetic: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-cryptarithmetic/2026-10-20T00:00:00Z2026-10-20T00:00:00ZCryptarithmetic 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.RedaccionHashiwokakero (Bridges): Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-hashiwokakero/2026-10-20T00:00:00Z2026-10-20T00:00:00ZHashiwokakero rules and controls: give every island exactly as many bridges as its number, keep the whole network connected, and spend your five hints well.RedaccionHex: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-hex/2026-10-20T00:00:00Z2026-10-20T00:00:00ZHex 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.RedaccionKnight's Tour: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-knights-tour/2026-10-20T00:00:00Z2026-10-20T00:00:00ZKnight'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.RedaccionMasyu: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-masyu/2026-10-20T00:00:00Z2026-10-20T00:00:00ZMasyu 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.RedaccionPeg Solitaire: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-peg-solitaire/2026-10-20T00:00:00Z2026-10-20T00:00:00ZPeg 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.RedaccionPipe Puzzle: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-pipe-puzzle/2026-10-20T00:00:00Z2026-10-20T00:00:00ZPipe 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.RedaccionSudoku: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-sudoku/2026-10-20T00:00:00Z2026-10-20T00:00:00ZThe rules of Sudoku step by step, the strategies that actually solve a board and every control — mouse, keyboard and gamepad. Deduction, not luck.RedaccionThermometers: Rules, Strategy and Controls — a Player's Manualhttps://tabandblank.com/blog/manual-thermometers/2026-10-20T00:00:00Z2026-10-20T00:00:00ZThermometers: raise the mercury from each bulb, satisfy the row and column counts. Full rules, strategies and controls for this logic puzzle.RedaccionThe Spanish Deck: Six Centuries of Playing Cards in Four Suitshttps://tabandblank.com/blog/baraja-espanola/2026-10-16T00:00:00Z2026-10-16T00:00:00ZCoins, cups, swords and clubs: how the Spanish-suited deck kept its medieval pips for over six centuries, and why Klondike still works with it.Redaccion