1

Open file

Normal

2

Fool's mate

Normal

3

Light square

Normal

4

Dubious Move

Normal

5

Touch and move

Normal

6

Over step

Normal

7

Weak square

Normal

8

Distraction

Normal

9

Connected passed pawn

Normal

10

Illegal Move

Normal

11

Backward pawn

Normal

12

Block

Normal

13

Bad move

Normal

14

Smothered mate

Normal

15

Triangulation

Normal

16

Automaton

Normal

17

Dynamic possibilities

Normal

18

Transposition

Normal

19

Queening square

Normal

Triple rook

Normal

21

Grand master

Normal