Woodoku combines a block-placement puzzle with the structure of a 9×9 Sudoku board. There is no story, character campaign, or traditional ending. Instead, the player receives sets of wooden block shapes and places them on the grid to create complete rows, columns, or 3×3 squares. Completed sections disappear and create more space for future pieces. A run continues until none of the available blocks can fit anywhere on the board.

Clearing the 9×9 Board

Unlike Tetris-style games, blocks do not fall automatically. Players choose where to place each shape, so every move can affect several future turns. Some pieces occupy only a few cells, while larger or awkward shapes require much more free space. Since blocks cannot simply be removed after placement, leaving open areas for different shapes is one of the main parts of the strategy.

Combos, Streaks, and Scoring

Points are earned by placing pieces and clearing completed sections. Removing multiple rows, columns, or squares together can create Combo points, while continuing to clear blocks across consecutive turns produces Streak points. This makes it useful to prepare several areas of the board instead of always clearing the first possible line immediately.

The main gameplay involves:

·         dragging wooden block shapes onto the 9×9 grid;

·         completing rows and columns to remove blocks;

·         filling 3×3 squares for additional clears;

·         creating Combos by clearing several areas together;

·         maintaining Streaks across consecutive turns;

·         keeping enough empty space for the next set of pieces.

Planning Several Moves Ahead

Woodoku does not use a timer in its standard block-puzzle gameplay, so players can examine the board before committing to a move. The main difficulty comes from space management. Filling the center too aggressively can leave no room for large shapes, while keeping too many scattered empty cells can prevent complete rows or squares from forming. Because the next pieces may have very different shapes, flexible open areas are usually more useful than narrow gaps.

The main endless mode focuses on achieving a higher score before the board becomes blocked, while the game also offers daily puzzles and additional puzzle content. These modes keep the same basic idea of placing wooden pieces into the Sudoku-style grid but provide extra objectives beyond a single high-score run. Woodoku therefore depends less on speed than on positioning, planning, and deciding when to clear blocks immediately and when to prepare a larger combination.