The Basics
We'll start solving the board from the top, removing the tiles of the undesired color one horizontal row at a time.
You can move a tile one space to the right by clicking the tile that is to the bottom right of it.
(Image shows a Medium mode board, but the principle is the same.)
Move all tiles of the undesired color (light in the images) to the right until there are none left in the first row.
Once the first row is clear, do the same with the second row, then the third row, then the fourth.
From the fifth row onwards, you can only clear tiles by pairing them up.
You can't use the edge to get rid of tiles, since the last tile doesn't have a tile to the bottom right of it.
Method 1
This method is the exact method originally from
this video (link leads to YouTube).
Clear the tiles of the undesired color from the board working from the top down and from left to right. You will eventually have leftover tiles in the highlighted area.
To make it easier to look up solutions, we'll give the configurations names depending on which tiles in that area are of the color we want to get rid of; in this guide's images that color is Light.
1 = Light tile
0 = Shadow tile
For example, this configuration will be called 10010 1000.
In the following solutions, you will be instructed to click entire rows and diagonals of tiles.
Here is a spreadsheet that will find your solution for you after you input your configuration's name.
After clicking the required rows and diagonals, start solving again from the top, bring the resulting tiles down working from left to right. You should then be able to completely clear the board.
Method 2
This method is slightly slower than Method 1, but it has a shorter list of solutions.
Clear the tiles of the undesired color from the board working from the top down and from left to right.
If you can't clear the
fifth row because you have an odd number of tiles in that row, click all tiles in the fifth row, then continue solving bringing the resulting lit tiles down from left to right.
If you have an odd number of tiles in the
sixth row, click the first and last tiles in the first row, then continue solving.
If you have an odd number of tiles in the
seventh row, click all tiles in the fourth row and tiles 124689 in the fifth row (shown in the image), then continue solving.
If you're solving correctly, you shouldn't need to use any of these click patterns more than once in the same level, thought you might need to use all three in a level.
You will eventually have leftover tiles in the highlighted area.
To make it easier to look up solutions, we'll give the configurations names depending on which tiles in that area are of the color we want to get rid of; in this guide's images that color is Light.
1 = Light tile
0 = Shadow tile
For example, this configuration will be called 10010 1.
In the following solutions, you will be instructed to click entire rows and diagonals of tiles.
Configuration
00000 1
00001 0
00001 1
00010 0
00010 1
00011 0
00011 1
00100 0
00100 1
00101 0
00101 1
00110 0
00110 1
00111 0
00111 1
01000 0
01000 1
01001 0
01001 1
01010 0
01010 1
01011 0
01011 1
01100 0
01100 1
01101 0
01101 1
01110 0
01110 1
01111 0
01111 1
10000 0
10000 1
10001 0
10001 1
10011 0
10011 1
10100 0
10100 1
10101 0
10101 1
10110 0
10110 1
10111 0
10111 1
11000 0
11000 1
11001 0
11001 1
11010 0
11010 1
11011 0
11011 1
11100 0
11100 1
11101 0
11101 1
11110 0
11110 1
11111 0
11111 1
10010 0
10010 1

__

Rows
R1
R1 R4
R1 R2 R3 R5
R1 R4
R4

R1
R2 R3
R1 R2 R3
R5
R1 R5
R5
R2 R3 R4
R1 R4 R5
R1 R2 R3
R1

R4
R2 R3 R5
R4
R1 R4
R1

R4 R5
R1 R4 R5
R1 R5
R5
R1 R5
R5
R4 R5
R2 R3
R2
R3 R4 R5
R1 R2 R4
R1 R3 R5
R2
R1 R5
R3
R1 R3
R2 R5
R1 R2 R5
R2 R5
R3 R4
R1 R2 R4 R5
R1 R3
R1 R2
R2
R2 R4
R3 R5
R2 R4
R1 R2 R4
R1 R2
R2
R1 R3
R3
R1 R2 R5
R2 R5
R3 R4
R1 R3 R4
R2 R4 R5
R3
R3 R5
R1 R3 R5

__

Diagonals
D1 D4
D2 D3 D5

D1
D4
D1 D2 D3 D5
D2 D3 D4 D5
D2 D4
D1 D2
D1 D2
D2 D4
D3 D5
D2
D2
D3 D5
D5
D1 D4 D5
D2 D3
D5
D1 D5
D4 D5
D1 D2 D3
D2 D3 D4
D1 D3
D3 D4
D1 D2 D5
D2 D4 D5
D3
D1 D3 D4
D2 D5
D3
D2 D5
D3
D3
D2 D5
D1 D3
D2 D3 D4
D4 D5
D1 D5
D1 D5
D4 D5
D2 D3
D5
D5
D2 D3
D2
D1 D2 D4
D3 D5
D2
D1 D2
D2 D4
D1 D3 D5
D3 D4 D5
D4
D1
D1
D4
D1 D4


D2 D3 D5
D3 D4
D1 D3

After clicking the required rows and diagonals, start solving again from the top, bring the resulting tiles down working from left to right. You should then be able to completely clear the board.
The solutions for the last two rows are originally from
this video (link leads to YouTube) and have been adapted to reduce the number of solutions you need to search through.