Sudoku · First Discoveries

Learn to eliminate options, find the only place and fill in your own 4x4, 6x6 and 9x9 fields without guessing.

Trial tasks are available without registration. To save results, start classes in your student profile.

From topic to practice

What will we study

Choose a section or take classes in order. Both modes use the same objectives and results.

Rows and ColumnsLet's analyze the rule and apply it in independent tasks.

One line
Numbers in a string; Numbers are labels; Cell address.
Tasks: 5 · Theory: 1 · Free lesson
Checking the column
Vertical check; Two conditions together; Repetition is prohibited.
Tasks: 5 · Theory: 1 · Free lesson

Areas and candidatesLet's analyze the rule and apply it in independent tasks.

The frame defines the area
Area 2x2; Third check; Boundaries are important.
Tasks: 5 · Theory: 1
Candidates without a guess
Candidate; There is only one left; No answer yet.
Tasks: 5 · Theory: 1

From four to sixLet's analyze the rule and apply it in independent tasks.

Completing the small field
Chain; Original numbers; Checking the result.
Tasks: 5 · Theory: 1
Six different numbers
Size 6x6; Rectangular area; Same reasoning.
Tasks: 5 · Theory: 1

Nine numbersLet's analyze the rule and apply it in independent tasks.

Area 2x3
Don't confuse the sizes; The only place; Double check.
Tasks: 5 · Theory: 1
Go to nine
Field 9x9; No addition; Work in parts.
Tasks: 5 · Theory: 1

Reasoned decisionLet's analyze the rule and apply it in independent tasks.

Hidden single
One candidate cell; One number place; We are looking for both types.
Tasks: 5 · Theory: 1
Explaining every move
We're not guessing; We check the chain; Final control.
Tasks: 5 · Theory: 1

The course consists of chapters and thematic lessons. You can focus on one topic and understand it step by step.

Choose a grid of activities or a route map. Consecutive classes open in order. One lesson may contain tasks from different topics.

Learn at your own pace

Free thematic lessons: 2. Free consecutive lessons: 2. Other classes open with Premium. Access is granted by the parent.

Completed tasks, stars and results are saved in the student’s profile. Hints and explanations help you figure out the answer.