: Stability improvements for Android and iOS versions. File Security Warning

: A digit cannot be in any of the eight adjacent cells (a king's move).

: A digit cannot be a chess knight's move away from itself.

: At least one digit (typically 9) must not see another instance of itself along any horizontal, vertical, or diagonal line. Content of the Update

: Hand-crafted levels by Simon Anthony and Mark Goodliffe .

Chess Sudoku is a variant-style puzzle game where traditional 9x9 grids are solved using specific "chess-move" rules:

Based on the release timeline of the app—which first launched around March 2020 and saw frequent updates throughout its first year—the July 28, 2020 update typically included: