ChesSudoku

A chess puzzle game for Android, by Neuron Gaming.

Nine boxes, one piece in each, and no two pieces may see one another. It is a sudoku whose rule is the chessboard: a rook holds its rank and file, a bishop its diagonals, a knight the squares it jumps to — and every piece you place takes squares away from the ones still in your hand.

Ways to play

• Basic — nine pieces, nine boxes, no two in sight of each other.
• Protect the King — fill the board, then find the one square the king can stand on.
• Cavalry and Knights — boxes that seat two, and a board where every piece jumps.
• Assassin — the rule inverted: your pieces must see the targets, and never each other.
• Daily Challenge — four boards a day, the same four for everyone, built on the device from the date.

About the game

ChesSudoku has no account of its own and plays entirely offline — the puzzles are generated on your phone rather than fetched from anywhere. Leaderboards are the one optional exception: sign in to Google Play Games to compare your times, or skip it and nothing ever leaves the device. It is free, and advertising is what pays for it: you can watch an ad to earn a hint or a second chance at a board, and occasionally one appears between boards. There are no banner ads, and nothing ever covers the board while you play.

Contact and privacy

Package com.neurongaming.chessudoku. The privacy policy explains what the app does with data. The short version is that it collects nothing about you unless you choose to sign in to the leaderboards; the only third parties involved are Google AdMob, which serves the ads, and Google Play Games, which runs the leaderboards if you use them.