Queen Doku

Objective

Solve the board by placing Queens in valid cells according to the grid rules: exactly one Queen per row, column, and colored region, with no Queens touching, even diagonally. Avoid making mistakes, manage your moves carefully, and achieve the highest score before time runs out.

Setup

• A session timer counts down from the start of the game.
• The goal is to place all required Queens and complete the board before time runs out.

Gameplay

1. Placing Queens & Crosses

• Double-tap a cell to place a Queen.
• Single-tap or drag across cells to place an X (Cross) to mark eliminated cells. Tap or drag again to remove the Xs.
• The board is solved when all required Queens have been correctly placed without violating any of the placement rules.

2. Placement Rules

• Row & Column Rule: Exactly one Queen must be placed in each row and each column.
• Color Region Rule: Exactly one Queen must be placed in each colored region.
• No-Touch Rule: Queens cannot touch each other in any direction, including diagonally.

3. Mistakes & Lives

• Placing a Queen in an incorrect cell costs one life.
• The game ends after you lose 3 lives.

Scoring

Your total score consists of:

1. Base Score

• Points are awarded for each Queen placed correctly.

2. Time Bonus

• Completing the level more quickly awards additional bonus points based on the remaining time.

3. Remaining Lives Bonus

• Earn bonus points for each remaining life when you complete the level.

4. No Mistake Bonus

• Earn an additional bonus for completing the level without making any mistakes (keeping all 3 lives).

Level Completion

The game ends when:

• All required Queens have been correctly placed and the board is solved.
• You lose all 3 lives.
• The timer reaches zero.