The Peg solitaire game is a board game for one player.
A valid step, is to jump a peg orthogonally over an adjacent peg, into a hole two positions away and then to remove the jumped peg.
In this website, valid pegs are red colored.
The game is over when there is no option to do any further valid step.
The goal of the game is to leave only one peg in the center of the board.
For more info, see here: Wikipedia-Peg Solitaire

I used to play this game in my beloved grandparents house, while I was a kid.
This game is dedicted to thier memory.