Unlike - think I get what you're saying. Will try it with the two options for 3 in the top middle.
Still leaves options in middle left and bottom left so I don't see how that works
Phil -- bottom right (provided you've filled in everything possible up to the chokepoint) is the block where either of the initial positions for a 3 in upper middle results in the same position for a 3.
Not so easy, maybe. I used a loner-of-five, off a double virtual.
Oh, what a difference a nap makes. I was bogged down, slogging in quicksand, thinking I'd maybe already made a mistake and that it was impossible. Then, after a nap, boda-bing boda-boom, finished, no green, no guess.