### Use of Xs and Os for puzzles with 4 colors

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 Kylie Harman Posts: 39 Join Date: 2/5/04 Use of Xs and Os for puzzles with 4 colors Answer 5/14/07 7:15 AM The strategy for solving 3-color puzzles has been discussed in this forum quite a bit, but I haven't seen strategies for puzzles with 4 or more colors. I've also read some posts about not solving colored puzzles because of the complexity of the logic.When I am solving a 4-color puzzle, I use the Xs and Os with colors in the squares to allow for additional options. Here is how I indicate each possibility:No marks (default unknown squares): Can be any colorX with a color: Can be any color except the one shownO with a color: Can only be that color or blankColor/blank with no X/O: Known squareThis covers all possibilities for what is known about a square's coloring in a 4-color puzzle. It can be a little difficult to change from X to O, but I haven't seen puzzles where it is necessary to do that repeatedly.You can use a similar notation system for puzzles with more than 4 colors, but it won't cover every possibility. With the addition of the capability to use X and O in the same square it's possible to cover all possibilities for a 5-color puzzle, but the notations become more complicated as the number of possibilities increases. How do you all solve these puzzles? 0 (0 Votes)
 Dawn . Posts: 61 Join Date: 11/11/06 Re: Use of Xs and Os for puzzles with 4 colors Answer 5/15/07 1:02 AM as a reply to Kylie Harman. HiWell to be honest with some amount of brain and eye strain - :scratch: I have been using this site for 6 months now and am in 2,182 position in points solving, however I have only just discovered XXX & ooo s. :oops: When i arrived on the site I didn't bother to read the 'how to' as i already new how from doing them in books. I recently saw on the forum people talking about XX & ooos so went to the manual and found how.I was doing an 'andreasss' puzzle and gave them a go and they were definately a great help so now i will try your method too - very useful - thank you. Freespirit 0 (0 Votes)
 Kim Eecloo Posts: 2 Join Date: 8/7/05 Re: Use of Xs and Os for puzzles with 4 colors Answer 6/23/07 12:28 PM as a reply to Kylie Harman. ^^ no shame in that... I've been here for a year (well then I signed up) and I found out...today, tss shame on me 0 (0 Votes)
 Julie Posts: 11 Join Date: 12/20/05 Re: Use of Xs and Os for puzzles with 4 colors Answer 11/13/07 9:38 PM as a reply to Kylie Harman. I just discovered the x's and o's as well but I can't seem to get them to work. Do they only work with puzzles with two colors? I tried the shift left click and it didn't work. I am not using the applet.I've gotten pretty good at solving puzzles however beyond 6 million points is too difficult for me. Any suggestions? 0 (0 Votes)
 Jelga . Moderator Posts: 1588 Join Date: 1/31/04 Re: Use of Xs and Os for puzzles with 4 colors Answer 11/15/07 9:14 AM as a reply to Kylie Harman. Hi,I've never tried to do Griddlers on a laptop, so I have no idea if it's possible to use the markers without a mouse. Maybe someone else has experience with this?As for solving the multicolored millions puzzles, I wouldn't be able to solve them without those markers myself (though some I cannot even solve anyway). So I'd advise to get a mouse if you cannot get the X's to work without it!Jelga 0 (0 Votes)
 Wayne Bennett Posts: 213 Join Date: 8/14/03 Re: Use of Xs and Os for puzzles with 4 colors Answer 11/16/07 12:00 AM as a reply to Kylie Harman. I can only use the "shift/mouse" buttons to get the O's on or off the puzzle. Unfortunately, if your laptop does not have a middle mouse button (most, like mine, don't), you can't use the X feature. :sad2: Hope that helps.Wayne"Jeltje":Hi,I've never tried to do Griddlers on a laptop, so I have no idea if it's possible to use the markers without a mouse. Maybe someone else has experience with this?As for solving the multicolored millions puzzles, I wouldn't be able to solve them without those markers myself (though some I cannot even solve anyway). So I'd advise to get a mouse if you cannot get the X's to work without it!Jelga 0 (0 Votes)
 xitvono Posts: 86 Join Date: 10/31/07 RE: Re: Use of Xs and Os for puzzles with 4 colors Answer 6/7/08 7:59 AM as a reply to Wayne Bennett. Does anyone have any other suggestions for methods for 4 color puzzles? My idea was that I would designate 2 colors as primary colors, then I would mark every square that can be the third and make marks for what other colors it can be like I do for 3 color puzzles. What are some good 4 color puzzles to do? 0 (0 Votes)
 Erik de Bont Posts: 57 Join Date: 9/14/04 RE: Re: Use of Xs and Os for puzzles with 4 colors Answer 6/7/08 12:21 PM as a reply to xitvono. I fill in the whole gridd with O's. After that I start tto fill in the clues form the egdes with the color of that clue. If a cell is right I remove the O. Hawkmoon 0 (0 Votes)
 Jelga . Moderator Posts: 1588 Join Date: 1/31/04 RE: Re: Use of Xs and Os for puzzles with 4 colors Answer 6/7/08 11:10 PM as a reply to xitvono. xitvono: What are some good 4 color puzzles to do?A very nice (and difficult!) 4 colors multi is Wanderers (32519) by Dreamelina. With some of the very complex 4 colored puzzles I use the markers combined with colors. Blue with an X would mean - cannot be blue (but could be any of the other colors) and blue with an O would mean - has to be blue or the background color. That way I can cover all 4 colors with markers. You have to get used to it though - the puzzle will look messy and in some lines the red lights will appear. But it works!Jelga 0 (0 Votes)
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