I use websudoku.com. Under OPTIONS you can check "pencil marking" ("Allow multiple numbers to be typed into each cell"), and it is the BEST THING EVER.
Srsly, process of elimination! My average time on evil is in the mid-three minutes on that, and I owe it all to pencil markings, because without that I'm lucky to get anything in, like, 20. It's WAY too hard to keep track of shit.
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Srsly, process of elimination! My average time on evil is in the mid-three minutes on that, and I owe it all to pencil markings, because without that I'm lucky to get anything in, like, 20. It's WAY too hard to keep track of shit.