Yukon Solitaire looks like Klondike and plays nothing like it. All 52 cards are dealt into seven tableau columns with no stock pile and no waste — everything you will ever get is on the table from the first second. The twist is that you can pick up any face-up card along with every card sitting on top of it, whether or not they form a sequence, and drop the whole group onto a card one higher and of the opposite colour.
That single rule changes the game completely. There is no luck of the draw and no shuffling your way out of trouble: every deal is solvable or not from the layout you can see, and losing is your fault. Most players find it harder than Klondike and better for it.
Yukon deals every card face up with no stock pile, and lets you move any face-up card together with all the cards on top of it, even if they aren't in sequence. Klondike only lets you move ordered runs and gives you a stock to draw from.
No. A good share of deals are solvable with careful play, but some layouts cannot be won. Because nothing is hidden behind a shuffle, a lost game is usually a planning mistake rather than bad luck.
Yes — drag or tap cards to move them. It runs in the browser with nothing to install.