Tutorial

Here we’ll show you how to solve starbattle logic puzzles. This tutorial shows teaches you how to solve puzzles with 2 stars. You can find a tutorial on solving 1-star puzzles here.

Rules

There are 4 simple rules to solve the puzzles:

  1. All rows must contain 2 stars.
  2. All columns must contain 2 stars.
  3. All islands must contain 2 stars.
  4. Stars may not be neighbors – not even diagonally.

To solve a puzzle one simply applies these rules over and over.
There’s only one valid solution to each puzzle, and by applying the rules logically you get there!

Example

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Because of the Neighbor-Rule one of the two stars in this island must be in this corner of the island.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Neighbor-Rule: next to a star can be no other star.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Because of the Neighbor-Rule one of the two stars in this island must be in this corner of the island.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Neighbor-Rule: next to a star can be no other star.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Because of the Neighbor-Rule the stars in this island can only be in it’s edges.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Neighbour-Rule: next to a star can be no other star.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9

We found all the stars in column 3, so we can now exclude the remaining empty fields.

We found all the stars in row 7, so we can now exclude the remaining empty fields.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
The island 5 has only as many free fields as it lacks stars, so we can place them.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Neighbor-Rule: next to a star can be no other star.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9

We found all the stars in column 5, so we can now exclude the remaining empty fields.

We found all the stars in row 6, so we can now exclude the remaining empty fields.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
The island 2 has only as many free fields as it lacks stars, so we can place them.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Neighbor-Rule: next to a star can be no other star.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
We found all the stars in row 5, so we can now exclude the remaining empty fields.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Because of the Neighbor-Rule one of the two stars in this island must be in this corner of the island.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Neighbor-Rule: next to a star can be no other star.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
The island 3 has only as many free fields as it lacks stars, so we can place them.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Neighbor-Rule: next to a star can be no other star.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9

We found all the stars in column 1, so we can now exclude the remaining empty fields.

We found all the stars in row 3, so we can now exclude the remaining empty fields.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Because of the Neighbour-Rule one of the two stars in this island must be in this corner of the island.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9

The row 8 has only as many free fields as it lacks stars, so we can place them.

The island 4 has only as many free fields as it lacks stars, so we can place them.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Neighbor-Rule: next to a star can be no other star.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
We found all the stars in column 9, so we can now exclude the remaining empty fields.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Because of the Neighbor-Rule one of the two stars in this island must be in this corner of the island.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
Neighbor-Rule: next to a star can be no other star.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9

We found all the stars in column 6, so we can now exclude the remaining empty fields.

We found all the stars in row 1, so we can now exclude the remaining empty fields.

 

1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9

The column 4 has only as many free fields as it lacks stars, so we can place them.

The column 8 has only as many free fields as it lacks stars, so we can place them.

The column 7 has only as many free fields as it lacks stars, so we can place them.

 

 

That’s it, you’re done! Have fun playing!