Straights (also called Str8ts) splits each row and column with black cells into runs; every run of white cells is a set of consecutive numbers, and digits never repeat in a line.

Is this Straights generator free?

Yes. Pick a difficulty, generate a puzzle and print it with its answer, with no sign-up and no watermark. It is free for classroom, home and personal use.

Does every puzzle have one solution?

Yes. Every puzzle is generated and checked by the same solver our Publisher Studio uses, so the clues fix exactly one solution. A puzzle is never ambiguous or unsolvable.

Does it include the answer?

Yes. Every puzzle prints as two pages: the puzzle on page one and its answer on page two, so you can check your work.

What size are the pages?

The free tool prints at 8.25 by 11 inches, a popular large-print size. Our Publisher Studio will export the same book at any KDP trim, from 5.06 by 7.81 up to 8.27 by 11.69, as a print-ready 300 DPI interior.

Free tool

Free Straights generator, with the answer

Pick a size and generate a Straights, then print it with its answer. Every puzzle has one solution, with no sign-up and no watermark. It runs on the same engine as our KDP Publisher Studio.

Difficulty

Larger grids with fewer givens are harder. Every puzzle has one solution.

6×6 grid. Each run of white cells between the black cells is a set of consecutive numbers.

Two pages: the puzzle and its answer. Every puzzle has one solution, checked by the same engine as our KDP studio.

Want the whole book?

This makes one puzzle. Sign up to turn it into a full Straights book for Amazon KDP: hundreds of graded puzzles at any trim, as print-ready PDFs.

Build the full book

Free to build · pay once to export

Preview

The puzzle and its answer, as they print.

Straights Medium

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Straights Medium · Solution

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How to make a Straights puzzle

1Pick a difficulty. Choose a grid size. Larger grids give the logic more room, so they take longer to solve.
2Generate the puzzle. Press Generate puzzle. You get a fresh grid, proved to have exactly one solution.
3Print the two pages. Press Print / save PDF. You get two pages: the puzzle on page one and its answer on page two.

How to solve straights

Fill the white cells so every row and column holds distinct digits, and each run of white cells between the black cells is a set of consecutive numbers.

The method

1Spot the runs. The black cells split each row and column into runs. A run of three white cells holds three consecutive numbers in any order.
2Use the length. A run of length L can only hold numbers within a window L wide, so its highest and lowest digits are L apart.
3Respect the whole line. Digits never repeat across a full row or column, and a black clue digit is excluded from the white cells of its line.
4Narrow the windows. A given digit fixes a run’s window. Cross rows against columns until each cell has one option.

The one rule: Distinct digits per line, and each run a set of consecutive numbers.
What the answer page shows: The completed grid is printed at the back.
How the grades differ: Bigger grids bring longer runs and fewer givens.
Good for: Solvers who like sudoku with a twist.

Publishing a whole book?

This tool makes one puzzle for home or the classroom. To make a Straights book you can sell on Amazon KDP, Publisher Studio generates hundreds of graded puzzles across a difficulty curve, at any KDP trim, as a print-ready interior and solutions PDF.

See the KDP Straights maker

Questions

What is Straights?: Straights (also called Str8ts) splits each row and column with black cells into runs; every run of white cells is a set of consecutive numbers, and digits never repeat in a line.
Is this Straights generator free?: Yes. Pick a difficulty, generate a puzzle and print it with its answer, with no sign-up and no watermark. It is free for classroom, home and personal use.
Does every puzzle have one solution?: Yes. Every puzzle is generated and checked by the same solver our Publisher Studio uses, so the clues fix exactly one solution. A puzzle is never ambiguous or unsolvable.
Does it include the answer?: Yes. Every puzzle prints as two pages: the puzzle on page one and its answer on page two, so you can check your work.
What size are the pages?: The free tool prints at 8.25 by 11 inches, a popular large-print size. Our Publisher Studio will export the same book at any KDP trim, from 5.06 by 7.81 up to 8.27 by 11.69, as a print-ready 300 DPI interior.

Short of ideas? Browse our ready-made printables for this puzzle and print one today.