Daily Challenge #31: Sudoku (Easy)

Monday, July 13, 2026 — today’s challenge. The same puzzle for every player worldwide, and — like every CardHearth daily — a deal that plays fair.

▶ Play this challenge

On Monday, July 13, 2026, the CardHearth Daily Challenge was Sudoku (Easy). The game and its deal are both generated from the date, so everyone who played it got the identical puzzle — which makes finishing times directly comparable. Solve it before midnight UTC to extend your streak.

Every game in the daily rotation plays fair: Sudoku, Mahjong and 2048 deals are guaranteed solvable by construction, and FreeCell's unsolvable deals are so rare — about 1 in 76,000 — that you may never see one. Read more about how theDaily Challenge works, or browse all thegames on CardHearth.

▶ Play Daily Challenge #31