Sudoku for bro

Sudoku for bro is the standard 9x9 puzzle with nothing unusual about the rules. Each row, each column and each of the nine 3x3 blocks has to end up holding the digits 1 to 9, and no digit may appear twice in any of them.

What this version adds is help, in a few forms. A hint button fills in a correct number, though the instructions say you watch an advert to get one. A progress check looks over your grid for mistakes. If you would rather see the finished answer, the game can solve the puzzle outright, which the developer frames as a way to learn the solution.

There are several difficulty levels. The developer says the layout responds to screen size and runs on both desktop and mobile, and that adverts appear within the game.

Click or tap an empty cell to select it, then press a number key from 1 to 9 to fill it. Backspace or Delete clears the selected cell. When stuck, the hint button gives you a correct number once an advert has played. You can also check the board for errors, or ask the game for the full solution.

The rules forbid repeats, so any digit already placed rules that number out for the rest of its row, column and block. Run the mistake check before a wrong digit has a chance to mislead later placements, and save hints for when you are properly stuck, since each one costs an advert.

Classic 9x9 sudoku in a landscape frame, with more than one difficulty level. The developer lists mouse, touch and keyboard input and says the game works on desktop and mobile. Hints are paid for by watching adverts.

Sudoku Vault swaps hints for a Check button that locks correct digits, and adds 4x4 and 6x6 boards. Modern Sudoku leaves the 9x9 grid behind for a board of 20 boxes, checked once full.