What is Boulder Garden?
Boulder Garden is a Sudoku mode in Marble Sudoku where boulders block some holes. Each marble you place cracks every boulder in its row, column and 3×3 box. Small boulders break in one hit, big ones need two or three. Break every boulder and fill all the holes to win.
The Sudoku rules do not change: rows, columns and boxes still hold each colour once. The boulders change the order you play in, because a blocked hole only opens once enough marbles have landed around it. Every boulder you break scores points.
- 9×9 board
- Classic rules
- Boulders to break
The rules
- 1Classic rules. Each row, column and 3×3 box holds every colour once.
- 2Boulders block. A hole under a boulder cannot be played.
- 3Marbles crack. Each placed marble hits every boulder in its row, column and box.
- 4Size matters. Small boulders break in one hit, big ones in two or three.
Watch it on the board
- Boulders block their holes. You cannot place a marble under a boulder.
- Each marble cracks every boulder in its row, column and box.
- Big boulders need two or three hits before they break.
- Break every boulder and fill all the holes to win.
Tips
- Aim at the crowds. A hole that shares a row, column or box with several boulders cracks them all at once.
- Break big boulders early. They need more hits, so start chipping at them before the board fills up.
- Solve the rest first. The hole under a boulder still has one right colour. Work it out from the rest of the board, then play it when the boulder breaks.
- Keep it logical. Boulders change the order, not the rules. Each marble still has to be the right colour.
Boulder Garden vs Classic Sudoku
| Boulder Garden | Classic | |
|---|---|---|
| Rules | Classic rules plus boulders | Rows, columns, boxes |
| Blocked holes | Under boulders until they break | None |
| Goal | Break every boulder and fill every hole | Fill every hole |
Boulder Garden FAQ
How do boulders break in Boulder Garden?
Each marble you place cracks every boulder in its row, column and 3×3 box. Small boulders break after one hit, big ones after two or three.
Can I play the hole under a boulder?
Not until the boulder breaks. After that the hole is open like any other.
Do the Sudoku rules change?
No. Rows, columns and boxes still hold each colour once. The boulders only change the order you can play in.
How do I win?
Break every boulder and fill all the holes.
Is Boulder Garden a standard Sudoku variant?
It is a Marble Sudoku original, built on the classic rules. It plays a bit like an obstacle puzzle on top of a normal Sudoku.
PLAY IT IN MARBLE SUDOKU
Clear the Boulder Garden
Place marbles where they crack the most boulders, then fill the holes underneath.
Next modeSudoku Duel
