NEW RULE: Thinking about the idea of an extension move - we might call it a stretch

[ozidom]

Here is how it would work

If you can't see the image let me know but here is the basic idea from the image "The knight(N) on C1 can move to the stretch square on D3 and that is valid as it is adjacent to an open square. The cost of the stretch move is an additional 5. So if the player completed a board in 10 normal moves and 2 stretches it would be a 20 move count."

Here it is in real life https://www.youtube.com/watch?v=J2PeO1P_XB0&t=10s

[ozidom]

The idea is to give a little bit more flexibility in solutions particularly for these type of tough boards

[ozidom]

In that example above a king also move to d2 for the cost of 5 moves