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Had most problem with the 2-4 8x8, but finally figured out that quirks that I could solve it reasonable everytime with minimal guessing.
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its a very fun game, but i'm not a fan of the medium badge containing the 2-4 8x8 badge. I dont think it can be logic'd, having to guess and undo really is annoying/hard. yes i looked at the total of each row and column, did the math to see what was needed to complete and what was needed to be removed and locked in or out relivant numbers, i tried doing sudoku logic where you create dependancies in order to eliminate options, but i wasn't able to figure out anything useful, i'm not saying its impossible, just beyond my efforts so far.
so my vote is to either remove it from the badge or make the badge "hard"
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I think the name of this game was an attempt to condense Mark Ruffalo's name. You know? The guy that plays the modern-day Hulk? Hence, the product became "Rullo".
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Clicking the header of the row / column shows you the total in that row. Countless time adding rows up in my head, all for nothing.
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How I solved it. Add each row and subtract total from the goal. Note that number on a scratchpad as the amount that needs to be removed. Do the same for the columns. Then starting top down get all the rows solved. Once all the rows are solved do the columns left to right....adjusting as you go. Pretty straightforward once you have the numbers that need to be removed.
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Nice game, I had to use a notepad on the side to list the possible combinations for each row and column. The 2-4 levels are still the hardest due to the multiple solutions. No, having more than one answer doesn't make it easier, it makes you confused as which is right and which is wrong.
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A tip for everyone struggling with 2-4. The only odd number on the entire board is 3. Check each of the column and row headers and see if you need an odd number, this should allow you to easily place all the threes and then you only have to worry about the even numbers. Be careful locking them though, as some solutions require 2 threes to make a six.
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As other people have said, I had to trial-and-error for 8x8 2-4. I was able to only use logic most of the way but I ended up stuck with all columns and rows requiring a 4 to be excluded and all unconfirmed tiles were 4s. I also think differences between required and current total sum would be more useful than just the current total sum.
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How I solved things: 1. Click around on the goal boxes until you find a relatively small difference between the gray running total box and the goal box. | 2. With this difference (call it "x"), determine what combinations of numbers cannot possibly add up to "x" and lock in those pink numbers (for example, lock in any numbers greater than "x", since you cannot add anything else to compensate for removing that number). | 3. With the remaining unlocked numbers, find out which ones add up to "x". If only one number/combination of numbers adds up to "x", then that is the solution. Remove that number/combination and lock the row. If more than one number/combination adds to "x", then move on to another row/column. | 4. Rinse and repeat. You'll return to unsolved rows/columns when you lock another row/column that intersects it. | *If you get to a point where all rows/columns have multiple solutions, you will have to resort to trial and error. Try one solution and see where that takes you.
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I suppose the difference between momentary supposition and guessing-and-checking every possibility all the way to the end is only one of degree, but the 8x8 2-4 seems unsolvable within realistic human ability without cheating (that is, just guessing and hoping at some point).
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If you're somehow lost, try to aim for columns / row with least unmarked numbers or find it impossible to follow algorithm any longer, begin guess-work on unmarked numbers (don't mark guessed numbers, so you can always back-up). If you're guessing, refer to the probability and remove the numbers with least chance to be incorrect guess (eg. removing one of two 2s is usually better than removing one of five 2s, especially If it marks 2 rows/columns as correct). There're some other rules related to how total sums in columns / rows are moving, but they're too intuitive for me atm (eg. you should sometime aim to somehow transfer final sums to crossing between unfinished rows/columns by removing two 2s and replacing them with just one 2 in crossing or the other way around) and I can't list them comprehensively.
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(Part II)
Removal ruleset:
Sum of unmarked number equals number to be removed - remove all unmarked |
Only one unmarked 3 in column/row + Need to remove an odd number - remove 3 |
Only one unmarked 2 in column/row + Need to remove 2 - remove 2 |
Need to remove 5 + Only one unmarked 2 in column/row - remove 2 |
Only one unmarked 2 in column/row + No unmarked 3s + Need to remove number indivisible by 4 - remove 2 |
Only one 4 in column/row + all remaining numbers are 3s + Need to remove 7 - remove 4 |
Only one 2 and two 4s and no 3s + need to remove 8 - remove both 4s and mark 2 to stay.
These aren't all of the rules, but they cover some of the most common cases. Remember to always inspect changes in altered columns / rows related to newly removed or marked numbers and re-apply rules above.
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(Part I) (For 8x8, 2-4)
Rules refer only to unmarked or unremoved numbers.
Marking ruleset:
Need to remove 5 - Mark 4s to stay |
Need to remove 4 - Mark 3s to stay |
Need to remove 3 - Mark 2,4s to stay |
Need to remove 2 - Mark 3,4s to stay |
Only one 3 in column/row + Need to remove an even number - mark 3 to stay |
Only one 2 in column/row + Need to remove 4 - mark 2 to stay |
Only one 2 in column/row + No 3s + Need to remove number divisible by 4 - mark 2 to stay |
Only one 4 in column/row + All remaining numbers are 3s + Need to remove 6 - mark 4 to stay |
Only unmarked 3s and unmarked 4s + Need to remove 8 - mark all 3s to stay |
Only unmarked 3s and unmarked 4s + Need to remove 9 - mark all 4s to stay |
Only one 2 in column/row + Need to remove 7 - mark 2 to stay |
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A few suggestions for Rullo. 1) A save mode so you can save a puzzle and come back to it. 2) More achievements built into the game so you can feel like you are progressing and have a final goal in the game. The save mode would also allow us to remove a mistake we might have made. 3) Oh, and I’d also like the sums to be always available instead of requiring a click. And also, change the SUMS to the amount the line is of by. For instance, show a line as with 1,2,3,4 | 7+3 (that means the goal is 7, but its off by three ) You can make space for this by removing the left most GOALS line. One more idea, add a top 10 personal times for each mode (and an average of those 10) so we can see our own progress.
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Nice game. I agree an undo button would be nice. And the 2-4 8X8 puzzle was half guessing and half logic (which goes back to the need of the undo button). But the gameplay is simple and all puzzles seem to be at the same difficulty in terms of logic needed to solve. The endless games give different sized puzzles that would be nice to have an option on classic mode. At least a few more options of larger sizes to give a bit more difficulty. But well done. Easy to pick up and the math is not hard.
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8x8 2-4 really need some luck(guessing) to solve, since there are too many choices for each line. 1-19 is super simple.
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Make that the best strategy I've found for every level. Another example: (23/15): 4, 4, 2, 4, 2, 2, 3, 2. 23 - 15 = 8, and you can't add 3 to any of the other numbers to get 8, so lock 3. But you can add different combinations of 4 or 2 to get 8, so you're done here for now. Move on to another row/column.
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The best strategy I've found for completing endless puzzles is: for a given row/column, click on the edge-square to see the remaining difference. Then look at the row/column and lock the squares that can't be added up to form that difference. E.g. (51/47): 8, 19, 4, 12, 8 - the only number you can subtract is 4, so remove it. Then move onto the next. Lock any rows/columns you solve, and repeat.
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I wish it saved more stats in detail. I'd like to know what the fastest time was for each puzzle type was, so I could see if I had improved or not.
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I really love logic games, but if it involves a lot of guessing without any possiblity to save or mark guesses in a different way it just sucks - that is not logic anymore but trial and error
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Walkthrough: "Difference" Method: 1) Compare the answer boxes to the sum. If Difference: (sum - Answer) is lower than the max number in the red circles (e.g. 9 in 1-9, 4 in 2-4, or 19 in 1-19), lock every number in that row/column that's higher than the difference. 2) At the same time, lock every number that CAN'T be combined with another unlocked number, to form the Difference. 3) Sweep each column and each row. 4) Repeat sweeps until you've locked everything you can. 5) If you're ever left with a row/column where the unlocked buttons = Difference, remove them and lock the row/column. // From here, some additional things to try if you're still stuck: A) "Construction": As an alternate perspective, look at the numbers in the row that you HAVE locked. Add them together, and figure out what you're missing in order for it to add up to the answer box. Remove any number which doesn't combine well with the others. /// + if this helps!
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Could be ok, but there are a few big problems:
1) The interface is rather clunky for laptops/desktops. Definitely looks like a port from a phone app with little effort added.
2) Overloading left click. Click to turn on/off, click to lock, click to unlock, click to lock a row, click to check sum. Moving something to right click (say, locking) would be really helpful.
3) The 2-4 8x8 isn't solvable except by getting lucky. Especially in this context, having a flag to denote guesses would be very helpful to visualizes what you know and what you think might work. (Note: I did guess one right for the badge, but that mostly involved restarting until I got a favorable puzzle.)
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If I ever get the 2-4 8x8 completed through trial and error, I am totally gonna post a screen shot of it completed in these comments lol. For bragging rights of "I did it!"
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I cannot get past a 2-4 board. I've realized that it's never possible to reason out a solution, but it's really frustrating having to randomly try a bunch of different possibilities.