Kuromasu

A challenging logic puzzle: find the black fields, solve the puzzle!

Kuromasu is a challenging logic puzzle. The goal is to find the black fields on a grid with numbers, where a number indicates how many white fields this number can "see" in horizontal and vertical directions, while black fields block the view. Be careful though, black fields cannot be next to each other, and all white fields must remain connected to each other! Each puzzle has only one solution, which can be reached through logical reasoning, no guessing needed!

Solving these logic puzzles can be pretty difficult, but while playing, you can always check if your solution is correct so far, and if you are stuck, you can always ask for a hint.

Solve these logic puzzles to challenge yourself, relax, train your brain, or kill some time. This puzzle provides hours of challenging entertainment! With puzzles ranging from easy to fiendish, it offers something for both beginners and experts.

Are you up for the challenge? Can you solve them all?

Features:

- Check if your solution so far is correct

- Ask for a hint (unlimited, with explanation)

- Works offline

- Dark mode and multiple color themes

- And much more..

About the puzzle

Kuromasu can be classified as a binary determination puzzle, like Hitori or Nurikabe, or as object placement puzzle like Battleships or Star Battle (Two not Touch). The puzzle is invented by the Japanese puzzle publishing company Nikoli and it first appeared in 1991. The word kuromasu is Japanese and translates to something like "where are the black fields". All puzzles in this app are created by brennerd.

What's New in the Latest Version 3.7.1

Last updated on Jun 20, 2024

Minor bug fixes and improvements. Install or update to the newest version to check it out!

Kuromasu, also known as Kurodoko or Black and White, is a logic-based puzzle game that challenges players to fill a grid with black and white squares while adhering to specific rules. The goal is to create a pattern where the number of black squares in each row and column matches the numbers provided in the grid.

Rules of Kuromasu:

* Each row and column must contain the exact number of black squares specified in the corresponding number clues.

* No 2x2 block of squares can be entirely black.

* Black squares cannot touch each other horizontally or vertically, but they can touch diagonally.

Solving Kuromasu:

Solving Kuromasu involves a combination of logic and deduction. Players can begin by filling in the obvious squares, such as those that must be black or white based on the number clues. From there, they can use the following techniques:

* Exclusion: If a row or column has the maximum number of black squares allowed, then all remaining squares must be white.

* Inference: If a row or column has one less black square than the number clue, then the last square must be black.

* Chains: If a row or column has a series of white squares, then the squares on either end must be black.

* Elimination: If a square is surrounded by white squares in all four directions, then it must be black.

Tips for Solving Kuromasu:

* Start with the easiest rows and columns, which have fewer number clues.

* Look for patterns in the grid to identify potential black or white squares.

* Use a pencil and eraser, as you may need to make changes as you progress.

* Don't get discouraged if you make mistakes. Kuromasu can be challenging, but it's also rewarding to solve.

Variations of Kuromasu:

There are several variations of Kuromasu, including:

* Colored Kuromasu: Uses multiple colors of squares instead of just black and white.

* Diagonal Kuromasu: Allows black squares to touch diagonally, as well as horizontally and vertically.

* Irregular Kuromasu: Uses grids with irregular shapes, such as hexagons or triangles.

Kuromasu is a highly engaging and addictive puzzle game that can provide hours of entertainment. With a combination of logic and deduction, players of all skill levels can enjoy the challenge of solving these mind-bending puzzles.