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www.youtube.com##.ytp-cards-button-icon (min + ((num + max - Math.abs(num - max)) / 2) + Math.abs(min - ((num + max - Math.abs(num - max)) / 2))) / 2
Since min(a, b) = (a + b - |a - b|) / 2
and max(a, b) = (a + b + |a - b|) / 2
For a minesweeper variant purely based on logic, I highly recommend the game Tametsi. It has 160 handcrafted levels, and some have very interesting geometrical arrangements. I have logged over 100 hours in this game.