After i read the final solution.. i was shocked.. Was that really that easy?
I can't believe how i went wrong.. I was more than sure that the key is to find a right chess game which was visualized by the image.
I found game between
Henry Edward Bird vs Joseph Henry Blackburne from 1886And all suggested that it is it!
- The first player was called Bird
- The second player was called Blackburne
- The game was started with Bird Opening
- The game is quite famous and it has a dedicated name "Bird without a Nest" - there is no nest in the picture
- The game has 17 moves - number of leaves in the picture
- The key move in the game was to capture White Bishop with the Black Knight - the same as in the picture
- The above capture was taken on F2 squere - exactly as in the picture
- The final move in the game includes chess motive called Phoenix Attack
- Leaves suggested knight moves (L shape)
And please tell me, that it is nothing about this game

...
If i could improve the puzzle, i would encrypt information about how to assign bits value e.g. outer collor yellow = 0, skinny = 0, somewhere in the image, so that this solution wasn't only about a pure luck and juggling with countless permutation.
Nevertheless, congratulation to the winner.
I know! I posted this back in 2015. I thought for sure I was looking for an encrypted key and "bird without a nest" was the password.