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NYTSudoku

Strategy Guide

Learn NYT Sudoku Strategy

A practical guide for standard 9x9 Sudoku: rows, columns, 3x3 boxes, notes, singles, and no-guessing habits.

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Rules refresher

  • 1Fill every empty cell with a digit from 1 to 9.
  • 2Each row must contain digits 1 through 9 exactly once.
  • 3Each column must contain digits 1 through 9 exactly once.
  • 4Each 3x3 box must contain digits 1 through 9 exactly once.

Solving techniques

Use these in order before guessing. A clean Sudoku solve is mostly candidate elimination.

Study the full Sudoku learning path from basic row, column, and box checks to candidate notes, singles, locked candidates, and no-guessing habits. Each guide has its own crawlable URL, a step-by-step checklist, mistake notes, and a practice prompt you can apply on the live board.

Core rules

Beginner

The row, column, and 3x3 box checks that make every Sudoku move auditable.

1

Sudoku Rules

A standard Sudoku solution uses digits 1 through 9 exactly once in every row, column, and 3x3 box.

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2

Candidate Notes

Notes record the digits that are still possible for a cell after row, column, and box checks.

Open guide
3

Naked Singles

When a cell has exactly one candidate left after row, column, and box checks, that digit is forced on NYT Sudoku boards.

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Candidate logic

Intermediate

Notes, singles, and locked candidates for Medium boards and clean daily solves.

1

Hidden Singles

A hidden single appears when one digit has only one legal cell inside a row, column, or box on NYT Sudoku boards.

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2

Locked Candidates

When all candidates for a digit in one box sit on the same row or column, remove that digit from the rest of the line.

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Controlled pressure

Advanced

Hard-board habits that keep tests short and avoid blind guessing.

1

No-Guessing Solving

Use notes, singles, locked candidates, and short logic checks before testing branches on a hard Sudoku board.

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Daily and Unlimited practice

Choose the right Sudoku mode for the skill you want to train

Daily Sudoku gives one Easy, one Medium, and one Hard puzzle for the date. Unlimited Sudoku generates more boards by difficulty when you want extra practice.

A simple practice loop

  1. 1Warm up with Easy and name the rule behind each placement.
  2. 2Play Medium with notes turned on.
  3. 3Use Hard when you have time for candidate tracking.
  4. 4Switch to Unlimited when you want another board at the same difficulty.
1

Daily Sudoku

Daily mode is the shared routine: one Easy, one Medium, and one Hard puzzle per date.

Open Daily
2

Unlimited Sudoku

Unlimited mode is the practice room. Generate more Easy, Medium, and Hard boards without waiting for tomorrow.

Open Unlimited

Put the guide to work

Start with the current level, then use the blog guides when you want deeper examples of rules, beginner mistakes, and solving habits.

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