I never knew why every chess book says that knight's movements resembles Cyrillic/Greek letter "Г".
Rather, knight attacks cells around in the shape of circle:
|.|*|.|*|.|.|.|.| |*|.|.|.|*|.|.|.| |.|.|+|.|.|.|.|.| |*|.|.|.|*|.|.|.| |.|*|.|*|.|.|.|.| |.|.|.|.|.|.|.|.| |.|.|.|.|.|.|.|.| |.|.|.|.|.|.|.|.|
When a knight moves, it's like a rolling/tumbling wheel:
h |.|0|.|0|.|.|.|.| g |0|.|.|1|0|1|.|.| f |.|.|1|.|.|.|1|.| e |0|.|.|.|0|.|.|.| d |.|0|1|0|.|.|1|.| c |.|.|.|1|.|1|.|.| b |.|.|.|.|.|.|.|.| a |.|.|.|.|.|.|.|.| 1 2 3 4 5 6 7 8
( "0" - for previous attacked cells, "1" - for next. )
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