New game mode: Royals mode

[acenturyandabit]

In Royals mode, only kings and queens will spawn. However, kings cannot move to a square where they would be taken on the next move.

• Implement this mode
• Test if it is perhaps too hard...

[VelialCypher]

Can you explain the logic in more detail?
I might try to implement it.

[acenturyandabit]

However, kings cannot move to a square where they would be taken on the next move.

Right now, a king will happily move into check (by your knight) and you can take it. In this mode, a king will not intentionally move into check.

(... I just realised this means that you can never take a king on the next move, which makes the game impossible 😅 )

but I do like the idea of a royals mode. Let me workshop this idea a little more.

Thanks for taking a look!