Queens Puzzles

About the Queens game puzzle library

This page is the front door to the entire Queens game collection: more than 1,800 free Queens online logic puzzles, split evenly into six grid sizes from 7x7 all the way up to 12x12, with 300 unique boards in every size. Each one is a self-contained deduction challenge that asks you to place a single queen on every row, every column and every color region while keeping all of the queens apart, including on the diagonals. None of these boards were copied from anywhere — they are produced by our own generator and then checked to guarantee that each puzzle has one and only one valid solution.

Because every puzzle is verified to be uniquely solvable by logic alone, you never have to guess and you never have to backtrack from a coin-flip. If you reach a position where no move seems forced, the answer is always hiding in a constraint you have not fully used yet, not in a lucky stab. That guarantee is what makes the library a dependable place to practice: you can trust that the time you invest in reasoning will always pay off with a clean, gettable solution.

How the difficulty curve works

Within each grid size the 300 puzzles are arranged roughly from easier to harder, so the lower numbers ease you in and the higher numbers ask more of you. Difficulty in Queens is not about arithmetic or memory; it is about how long and how tangled the chain of deductions becomes before the board resolves. An easy board tends to hand you several forced moves right away, and each move opens up the next. A harder board hides its first forced move more carefully and may require you to combine two or three observations before a single square becomes certain.

This gentle ramp lets you set your own pace. New solvers can stay in the comfortable early numbers of a small grid and build fluency, while experienced players can jump straight to the high numbers of a large grid for a genuine test. Because there are so many boards at every level, you will never run out of puzzles that sit right at the edge of your current ability — the sweet spot where solving is most rewarding.

From 7x7 to 12x12: what actually changes

On a 7x7 board you are placing seven queens across seven rows, seven columns and seven color regions. The grid is small enough that you can usually hold the whole position in your head, and the path to the solution is short. These boards are ideal for learning the core moves, for a fast daily win, or for solving comfortably on a small phone screen.

As you climb to 9x9, 10x10 and beyond, the board does not just get bigger — it gets denser with interacting constraints. Every queen you place ripples further, every color region has more ways to wind across the grid, and the most powerful deductions start to involve relationships between whole groups of rows or columns rather than single squares. The 12x12 boards are the marathon of the collection: they demand patience, careful bookkeeping with your X marks, and the confidence to trust your logic across a long solve. Clearing one is genuinely satisfying.

A repeatable method for solving any size

The same approach works on every board, large or small. Start by scanning for the most constrained regions, columns and rows — the places with the fewest open squares — because those are where a queen is most likely to be forced. Whenever any line or region has just one square left, place its queen immediately. Then update the board: mark an X through the rest of that queen's row, column and region, and on each of the squares it touches diagonally and orthogonally.

Keep cycling through the board in passes. Each queen you place shrinks the options for several others, which frequently triggers a cascade of further forced moves. When the obvious moves dry up, look for subtler structure: if two color regions can only fit inside the same two rows, then those two rows are spoken for and every other region must avoid them. Spotting these 'used up' lines is the key that unlocks the toughest boards, and it becomes second nature with practice.

Common mistakes and how to avoid them

Most stuck positions in Queens come from skipping the bookkeeping rather than from a truly hard board. The biggest mistake is placing a queen and forgetting to mark every square it forbids; without those X marks, the next forced move stays invisible and the puzzle feels harder than it is. Make a habit of fully blocking out each queen's row, column, color region and the squares it touches before you look for your next move.

Another frequent slip is forgetting the diagonal rule. Two queens may not sit on touching corners, so a queen always blocks the eight squares immediately around it, not just the straight lines. Finally, resist the urge to guess on the larger grids. If nothing seems forced, you have almost certainly left a constraint unused — re-scan the tightest regions and the lines that are nearly full, and the certain move will appear. Patience beats guessing on every single board.

Track your progress across the collection

As you work through the library, your completion status is saved automatically on your own device, so you can see at a glance which boards you have already cleared and which still await you. There is no account to manage and nothing is uploaded anywhere — the record lives only in your browser. That makes it easy to set yourself goals, such as finishing every 7x7, beating one harder puzzle each day, or finally conquering a full size from number one to three hundred.

Pick any grid size below to see its boards, or drop into the daily challenge if you would rather have today's puzzle chosen for you. With over 1,800 unique puzzles plus a fresh one every single day, the Queens game online always has another solvable, guess-free challenge ready whenever you want to play Queens online and think.