Hitori on Shockwave:
http://www.shockwave.com/gamelanding/hitori.jsp
- You don't have to mark the white squares in this version, and it's usually easy enough that it's not necessary to mark the white squares.
- If you don't want to mark the white squares, hold the shift key down for the whole game so you get a black square with one click.
- Almost all the players play Regular mode. You can't tell from the scoreboard whether someone played Regular or Expert, but it's (almost?) impossible to get sub-20-second times on Expert. (It's impossible for me to get sub-30-second times even on Regular. I gave up trying to get faster than 30 seconds and switched to Expert.)
Hitoriconquest:
http://www.hitoriconquest.com/
- You don't have to mark the white (greenish) squares in this version.
- I like the 8x8 mode best. 5x5 is often too hard, and 12x12 takes too long.
- When I play 5x5, I don't bother to finish the games when I can't get enough squares marked white or black using single-line rules. I just click on 5x5 or 8x8 go get a new game. Call me lazy.
- I almost always mark all the squares in this version. I find it's necessary to keep track of what's white and what's unknown.
- The site keeps track of your average time and fastest time for each mode.
Hitori on Conceptis:
http://www.conceptispuzzles.com/index.aspx?uri=puzzle/hitori
- I find even the "easy" puzzles to be quite hard. I don't think I've ever solved a Hitori puzzle on this site without at least one round of trial-and-error.
- The puzzle isn't considered complete until all the squares are marked either white or black, but I wouldn't be able to complete a puzzle on this site without marking the white squares anyway.
- They have several free Hitori games that you can play without being a member.
- You can play one free game per week. I think you can do that without being a member, but I'm not sure since I am a member ...
