Top Results for Number
Killer Sudoku is a logic puzzle that combines the standard Sudoku grid with elements of Kakuro arithmetic. The 9x9 grid contains no pre-filled numbers; instead, cells are grouped into cages marked with a target sum. Solvers must deduce the placement of digits from 1 to 9, ensuring that no number rep...
Why this score
Long-running newspaper staple; strong solver reputation for arithmetic deduction, high accessibility, and broad Sudoku-variant adoption.
Scoring methodology
Fillomino is a grid-based logic puzzle published by the Japanese company Nikoli. The objective is to divide the grid into regions known as polyominoes. Each cell within a given region must contain a number equal to the total number of cells in that region. While some numbers are provided as starting...
Why this score
Major Nikoli genre; highly regarded for region growth logic and varied difficulty, though less mainstream than Sudoku or Picross.
Scoring methodology
Thermo-Sudoku is a variant of the traditional Sudoku puzzle that incorporates a constraint based on thermometer-shaped lines drawn on the grid. Along each thermometer line, digits must strictly increase in value starting from the unnumbered bulb end and moving toward the tip. Standard Sudoku rules s...
Why this score
Modern variant favorite; highly regarded by setters and solvers for clean visual constraints and elegant deduction chains.
Scoring methodology
KenKen is an arithmetic logic puzzle invented in 2004 by Japanese educator Tetsuya Miyamoto, who developed it as a teaching tool for his classroom. The puzzle is played on a square grid in which each row and column must contain the digits 1 through N without repetition, forming a Latin square. The g...
Why this score
Globally published arithmetic Latin-square puzzle; strong newspaper presence and broad appeal, despite cage arithmetic repetition.
Scoring methodology
German Whispers Sudoku is a variant of Sudoku in which a supplementary constraint applies to marked lines within the grid: adjacent digits along each marked line must differ by at least 5. The constraint is named after the party game 'telephone' ('Chinese whispers' or 'German whispers'), reflecting...
Why this score
Highly popular modern Sudoku constraint; strong pattern logic and setting flexibility, with broad Cracking the Cryptic-era recognition.
Scoring methodology
Arrow Sudoku is a logic puzzle variant that overlays standard Sudoku rules with arithmetic constraints. The grid features arrows originating from empty circles. The digit placed in a circled cell must equal the sum of the digits placed along the corresponding arrow's path. While standard Sudoku rule...
Why this score
Widely used in modern Sudoku setting; arithmetic constraint supports strong logic, though less iconic than Killer or Thermo.
Scoring methodology
Renban Sudoku is a variation of the standard Sudoku puzzle that introduces "Renban lines," which are often highlighted in a distinct color. The digits placed along each of these lines must form a set of consecutive, non-repeating integers, though they can be arranged in any order. For example, a lin...
Why this score
Major modern Sudoku line constraint; prized by setters for flexible, non-arithmetic logic and strong interaction with other rules.
Scoring methodology
Skyscrapers is a logic-based combinatorial puzzle originating in Japan that is built on the Latin square mathematical model. The puzzle is played on an N×N grid where the objective is to fill each cell with a height from 1 to N without repeating numbers in any row or column. Numbers placed around th...
Why this score
Widely published Latin-square variant; clear rules, strong deductions, and broad app/newspaper presence.
Scoring methodology
Skyscraper Sudoku is a logic puzzle variant that combines standard Sudoku rules with a spatial visibility constraint. Solvers place digits from 1 to 9 into a grid, treating each number as a building of that specific height. Numeric clues provided outside the grid's perimeter indicate how many buildi...
Why this score
Strong crossover with Skyscrapers logic; clear visual clues and well-regarded deduction, especially in hybrid Sudoku forms.
Scoring methodology
Calcudoku is a grid-based arithmetic puzzle that follows a format similar to KenKen. Solvers fill a square grid with digits, ensuring that no number repeats within any row or column. The grid is divided into outlined blocks called cages, each containing a target number and an arithmetic operation. T...
Why this score
Common KenKen-style arithmetic puzzle; widely published and accessible, though derivative identity lowers distinct acclaim.
Scoring methodology
Irregular Sudoku, frequently called Jigsaw Sudoku, is a logic puzzle variant that modifies the structural regions of standard Sudoku. Instead of the traditional nine 3x3 boxes, the grid is partitioned into irregularly shaped regions of nine cells each. The solving objective remains to fill the grid...
Why this score
Established newspaper-style variant; strong recognition and approachable novelty, though often close to standard Sudoku difficulty patterns.
Scoring methodology
Ripple Effect, also known as Hakyuu, is a number-placement logic puzzle published by Nikoli. The grid is divided into irregularly shaped rooms, and each room of size N must contain the integers 1 through N. Identical numbers placed in the same row or column must be separated by at least that number...
Why this score
Solid Nikoli number-placement puzzle; respected for clean constraints, though lower cultural visibility than flagship Nikoli types.
Scoring methodology
Suguru, also called Tectonics, is a Japanese number puzzle published by Nikoli in which each polyomino region of n cells is filled with the integers 1 through n, and no two equal numbers may touch, even diagonally.
Why this score
Popular region-number puzzle; strong mobile and newspaper presence, with approachable local adjacency logic.
Scoring methodology
Little Killer Sudoku is a Sudoku variant in which clues placed outside the grid indicate the sum of digits along specified diagonals. Unlike standard Killer Sudoku, where cage sums constrain grouped cells, Little Killer Sudoku allows digit repetition along diagonals because diagonal cells are not bo...
Why this score
Respected arithmetic Sudoku variant; diagonal sum clues enable deep deductions, though repetition allowance can confuse casual solvers.
Scoring methodology
Sandwich Sudoku is a Sudoku variant in which additional clues placed outside the grid indicate the sum of the digits positioned between the 1 and the 9 in each row and column. The name derives from the concept that the intervening digits are sandwiched between those two values. Standard Sudoku rules...
Why this score
Post-2019 hit among variant solvers; clever arithmetic flavor, but narrower mainstream reach and sometimes clue-heavy.
Scoring methodology
A magic square is an arrangement of distinct integers in a square grid where every row, column, and main diagonal sum to the same constant, with the earliest known example appearing in Chinese literature as the Lo Shu around 650 BCE.
Why this score
Mathematically iconic and ancient; high historical importance, but recreational solving can be formulaic.
Scoring methodology
Sudoku is a classic logic puzzle involving a nine-square grid. Players strategically place numbers one through nine to complete each row, column, and three-box section. It’s notable for its ability to sharpen logical thinking skills and remains popular with individuals seeking a challenging mental e...
Bulls and Cows is a classic code-breaking logic game in which one player thinks of a secret, usually four-digit, number and the other tries to guess it. After each guess, the first player provides feedback: a "bull" indicates a correct digit in the correct position, while a "cow" indicates a correct...
Why this score
Historic code-breaking game and Mastermind precursor; durable appeal, though feedback deduction is simpler than Mastermind variants.
Scoring methodology
Between Lines Sudoku is a logic puzzle variant designed for enthusiasts of constraint-based grid deduction. In this format, digits are placed along line segments that connect two circled endpoint cells. The numerical value of every digit along the line segment must fall strictly between the values o...
Why this score
Well-liked line constraint in modern Sudoku; elegant when set well, but less established than Thermo, Renban, or Whispers.
Scoring methodology
Binairo, also known as Takuzu or Binary Puzzle, is a logic puzzle played on a rectangular or square grid where cells must be filled with zeros and ones. The objective is to ensure that each row and column contains an equal number of both digits and that no more than two identical numbers appear cons...
Why this score
Popular binary puzzle in apps and newspapers; accessible, though often considered lighter than Sudoku-class deduction.
Scoring methodology
A Latin square puzzle is a mathematical logic challenge played on a square grid, directly derived from concepts explored by mathematician Leonhard Euler in the 18th century. The fundamental rule requires filling an n-by-n grid with n distinct symbols so that each symbol appears exactly once in every...
Why this score
Foundational combinatorial structure behind many puzzles; respected, though plain Latin-square completion is less engaging than Sudoku.
Scoring methodology
XV Sudoku is a logic puzzle variant that applies mathematical constraints to a standard Sudoku grid. Orthogonally adjacent cells may be marked with an X to indicate their values sum to 10, or a V to indicate their values sum to 5. In many variations, the absence of a mark between adjacent cells indi...
Why this score
Classic compact Sudoku variant; accessible and common, though limited expressiveness compared with richer line and cage systems.
Scoring methodology
Palindrome Sudoku is a variant of Sudoku that adds one or more designated lines to the standard 9×9 grid. Along each marked line, the sequence of digits must read identically in both directions, meaning the digit at one end must match the digit at the opposite end, the second digit must match the pe...
Why this score
Common modern Sudoku line constraint; creates elegant symmetry deductions, though usually secondary rather than headline constraint.
Scoring methodology
Samurai Sudoku is a Sudoku variant consisting of five overlapping 9×9 Sudoku grids arranged in a quincunx pattern, with the central grid sharing one 3×3 box with each of the four surrounding grids. The combined puzzle spans a 21×21 cell area, though overlapping regions are counted only once. Each of...
Why this score
Popular large-grid Sudoku variant; respected for scale, though overlap gimmick can feel repetitive versus deeper constraint variants.
Scoring methodology
Anti-King Sudoku is a Sudoku variant that adds a spatial constraint inspired by chess to the standard 9×9 grid. In addition to normal Sudoku requirements that each row, column, and 3×3 box contain digits 1 through 9 exactly once, the anti-king rule prohibits identical digits from appearing in any tw...
Why this score
Common chess-Sudoku variant; clear added restriction, but generally less rich than Anti-Knight and advanced line constraints.
Scoring methodology
Str8ts is a logic-based number puzzle invented by Jeff Widderich and popularized by fellow puzzle designer Andrew Stuart. Solvers are presented with a grid containing both white and black cells, where the black cells act as blockers similar to those in a crossword puzzle. The objective is to fill th...
Why this score
Commercially published Sudoku-like number puzzle; solid reputation, though less culturally durable than Sudoku or KenKen.
Scoring methodology
Nonconsecutive Sudoku is a mathematical logic puzzle that applies an additional global constraint to the standard Sudoku grid. While solvers must still ensure that each row, column, and 3x3 box contains the digits one through nine without repetition, a specific spatial restriction is enforced. No tw...
Why this score
Simple global adjacency rule with solid deduction value; respected but less exciting than richer marked-constraint variants.
Scoring methodology
Consecutive Sudoku is a logic puzzle variant that adds specific spatial constraints to the traditional 9x9 Sudoku grid. In this puzzle, a thick line or bar is used to mark the border between any two orthogonally adjacent cells that contain consecutive numbers. The defining mechanic is that the absen...
Why this score
Solid adjacency-constraint variant; simple and satisfying, but negative-constraint versions can become mechanical.
Scoring methodology
2048 is a mobile puzzle game centered around combining numbered tiles to achieve a final tile of 2048. Its notable simplicity and challenging gameplay create an addictive experience for players who enjoy strategic thinking and quick reflexes. The game is suitable for anyone seeking a casual, single-...
Kurotto is a grid-based logic puzzle published by the Japanese company Nikoli. The puzzle is played on a rectangular grid where certain cells contain numbers enclosed in circles. The objective is to shade specific cells black so that the number in each circled cell accurately represents the total si...
Why this score
Clever Nikoli shading puzzle; niche reputation and less intuitive rules limit wider consensus appeal.
Scoring methodology
