In your turn you have to enter the position your want to move from then the position you want to move to in two lines . first this is the chess board
| | a | b | c | d | e | f | g | h | |
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| 1 | ♖ | ♘ | ♗ | ♕ | ♔ | ♗ | ♘ | ♖ | 1 |
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| 2 | ♙ | ♙ | ♙ | ♙ | ♙ | ♙ | ♙ | ♙ | 2 |
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| 3 | | | | | | | | | 3 |
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| 4 | | | | | | | | | 4 |
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| 5 | | | | | | | | | 5 |
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| 6 | | | | | | | | | 6 |
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| 7 | ♙ | ♙ | ♙ | ♙ | ♙ | ♙ | ♙ | ♙ | 7 |
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| 8 | ♖ | ♘ | ♗ | ♕ | ♔ | ♗ | ♘ | ♖ | 8 |
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| | a | b | c | d | e | f | g | h | |
for example if you want to move the white knight .. its position is ( 8 , b) to position ( 6 , c )
the input have to be like that :
8 b
6 c