building fortresses (since enemy can't cross board border by capture) is also. fun.
1) fill corner board with pieces 2) cover the border (from inside) with pawns 3) cover the promotion square on the border with the king
king can't exit the board, pawns can't walk backward to leave space, filler doesn't allow these 2 to make way
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the real holy grail that will never be achieved I fear
A lot of people are still making flawed fortresses, just popped a black fortress with the help of tor and they were actually around and tried to defend it. So sad. muwahahah
https://onemillionchessboards.com/#4404,7993
https://onemillionchessboards.com/#2177,7993
https://onemillionchessboards.com/#1787,7994
and one more for white
https://onemillionchessboards.com/#3765,4
1) fill corner board with pieces 2) cover the border (from inside) with pawns 3) cover the promotion square on the border with the king
king can't exit the board, pawns can't walk backward to leave space, filler doesn't allow these 2 to make way
---
the real holy grail that will never be achieved I fear