14 Minesweeper Variants Episode 3 - Negation, Outside, Dual, Cross, and Snake

I only manage to do 16 boards this time, but some of these deductions were somewhat complicated. We are getting close to finishing all the variants, at which point we will have to deal with the combinations.

14 Minesweeper Variants Series:
Previous Episode: https://rumble.com/v4vz99l-14-minesweeper-variants-episode-2-liar-connected-triplet-wall-outside-and-n.html
Next Episode: https://rumble.com/v4xjx9t-14-minesweeper-variants-episode-4-snake-cross-balance-partition-and-eyesigh.html
Episode 1 (with links to all other episodes): https://rumble.com/v4ujfp8-14-minesweeper-variants-episode-1-ultimate-mode-vqcml.html