Hard Level Queens
10×10 boards for players who want a serious workout.
0 of 90 solved
Master Hard Level
- 01
Advanced elimination
Consider multiple constraints simultaneously.
- 02
Chain reasoning
If A is a queen, then B must be, which means C can't be...
- 03
Backtracking
Sometimes you need to try a path and undo if it fails.
- 04
Edge cases
Pay special attention to corner and edge cells.
Explore Other Difficulties
About Hard Queens
Hard is the heart of the game. It has 90 puzzles, by far our largest pack, and it is where the daily puzzle is drawn from, so every player who solves the daily is solving a Hard board.
At 10×10 the grid is large enough that the whole thing no longer fits in working memory. Successful solvers stop trying to hold it all and instead work a corner at a time, resolving one dense cluster of regions before moving on. Marking blocked cells is no longer a convenience here; without it, positions become genuinely difficult to read.
Expect ten to thirteen minutes, longer when a board resists. If you can finish Hard puzzles reliably you are solving the same difficulty the daily challenge sets every day, and Expert becomes a matter of scale rather than new technique.
Game Rules
- Each row must have exactly one queen.
- Each column must have exactly one queen.
- Each color region must have exactly one queen.
- Queens cannot touch, not even diagonally.
Difficulty Info
- Grid Size
- 10×10
- Average Time
- 10-13 min
- Total Puzzles
- 90
Stuck on a board? Our complete Queens strategy guide walks through the elimination techniques that solve every difficulty, from 10×10 boards up.