Dominoes Puzzle Game
Lorna Schildt
The rules are simple.You have to find the location of all dominoes on the grid. A domino is a pair of numbers. You can have only one of each pair.
Left click between two numbers to connect them in a domino. Right click to place a border which will help you separate numbers that you think cannot be connected.
Arrange the dominoes in seven squares. The number of dots along each side of the square must be equal to the number in the middle. Double click the dominoes (or use the rotate button) to rotate them then drag them into place.
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Dominoes is best-known as a game involving a range of tiles that must be placed end to end with matching numbers.
But did you know that dominoes is also the name of a single-player logic game? If not, then you do now!
The rules of the dominoes puzzle are simple - 28 dominoes from 0:0 through to 6:6 have been placed into a grid like the one to the right. Each domino is there exactly once. You must work out where each domino is by drawing thick lines around it in the grid. Keep track of each domino as you place it - when published, this puzzle includes a grid where you can mark off each of the 28 dominoes as you find them.
So, what strategy tips will help you solve dominoes? Well there are several nice pieces of logic you can use to help you, and it's important to note you never need to guess to solve any of our domino puzzles - you can reach the single solution through logic alone.
First off, look through the grid to see if there is only one way in which each domino can be placed in the grid. In this puzzle, you will note that 0 only neighbours itself once, so you can draw that in straight away as the location of the 0:0 tile (top row).
Often there will be multiple places a tile can be placed, but as you gradually make progress you will reduce the options.
It's as important to log where a connection cannot go as it is to log where a connection can go. For instance, if you decide that the 1:1 domino contains the two squares at the bottom-left of the grid, then you should place a small 'x' between the two 1s near the bottom-right corner of the grid, as you would know that they could not then connect.
Furthermore, note that the corners and edges are more restricted than elsewhere in the grid. Thus, if you had already placed the 2:4 elsewhere in the grid, then the 4 at the bottom-right of the grid could no longer pair with the 2 above it, meaning it would have to pair with the 1 alongside it.
A range of other bits of logic will occur to you as you start solving puzzles: for instance, sometimes you will know that a tile has to use a certain square in the grid, but it could link to multiple neighbours. For an example, ask yourself where 6:6 can go in the grid. You'll see that it must involve the final square in row three, but you can't tell whether it goes upwards or horizontally. However, you do know that it MUST involve the 6 at the end of row three linking to one of those other two sixes, so you can put a small 'x' between the 6 and the 5 below it, as you know that it cannot link to that 5.
Like dominoes puzzles and want more to play? Our book of 150 dominoes puzzles could be just what you're looking for!
Date written: 23 Mar 2020Category: logic Keywords: domino puzzles Puzzle Videos: Learn to SolveSandwich Sudoku Rules
A lovely sudoku variant, sandwich sudoku gives you hints around the edge of the grid as to the location of the 1 and 9 in each row and column. This video explains the rules so you can have a go at this fun but tricky variant...
If you'd like to try this puzzle before watching the video then you can do so here: Sandwich Sudoku Puzzle
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To begin, search for one domino (number pair) that is unique in the grid. Check the double numbers first (eg, 6 6) as they are easiest to spot. Once you have located a single domino, its precise position should enable you to place others. As the number of dominoes to be found is reduced, it becomes easier to spot the ones you need. The check-grid provides a useful tool to keep count of the dominoes you have found.
I've got a puzzle using dominoes for all here at Puzzling. I came up with it while playing around a few days ago, and I know it can be solved. It may not be a new idea, but to the best of my knowledge, no one else has posed it.
Using the standard set of 28 double-six dominoes, form a square frame of 9 by 9 squares with a 5 by 5 square gap in the middle (one domino being one square wide and two squares long). The dominoes must fit together in a brickwork-style interlocking pattern, such that the frame consists of an inner square frame of 12 dominoes and an outer frame of 16 dominoes.
I decided to restrict myself to solutions where every pair of adjacent squares with one from the inner frame and one from the outer frame, adds up to 6. This automatically makes all 2x2 squares add up to 12.
The corner 2x2 squares are then forced to use two pairs of digits, arranged diagonally. Each corner must use a different pair of digits, otherwise you have a duplicate domino. All that is left is to fill in the edges of the frame. I hardly needed any backtracking to complete those sides.
This is the Matador Dominoes Puzzle. I ran across this puzzle while searching the Internet for the instructions to a brain teaser puzzle since I seem to have misplaced them in my multitude of recent classroom moves.
In under a minute or two, the students exclaimed that the puzzle had been solved. I glanced up at their work and was about to congratulate them when I realized that their solution was actually NOT the solution.
They had matched up each of the edges, but they had not formed all seven of the double dominoes. Their solution had formed the double four domino twice and had neglected to form the double one domino. Frustrated, they went back to work.
I realize that not everyone will have ample space in their classroom for this jumbo version of the matador dominoes puzzle. So, I also resized the cards to make a smaller set that prints 1 set per letter sized page and fits in a snack sized sandwich bag.
I intentionally do not make answers to the printable math puzzles I share on my blog available online because I strive to provide learning experiences for my students that are non-google-able. I would like other teachers to be able to use these puzzles in their classrooms as well without the solutions being easily found on the Internet.
However, I do recognize that us teachers are busy people and sometimes need to quickly reference an answer key to see if a student has solved a puzzle correctly or to see if they have interpreted the instructions properly.
If you are a teacher who is using these puzzles in your classroom, please send me an email at sa...@mathequalslove.net with information about what you teach and where you teach. I will be happy to forward an answer key to you.
Sarah Carter teaches high school math in her hometown of Coweta, Oklahoma. She currently teaches AP Precalculus, AP Calculus AB, and Statistics. She is passionate about sharing creative and hands-on teaching ideas with math teachers around the world through her blog, Math = Love.
Sarah, You are amazing! I LOVE all of the awesome puzzles that you re-create and create yourself. We are loving them in my district. I have a question about the Rob's Puzzle Page website that you have referred to in this post. Are the puzzles that he shares on his website just for our "viewing pleasure" or is it possible to actually download them?
Thanks again!
Karen G.
Sarah Carter is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
Place the 8 dominoes from the bottom into the space at the top by replace the 7 dominoes at the top. This is essentially a missing piece puzzle like Sam Loyd has done. Only this one you do not slide the round circle to make the extra piece appear or disappear. A good sliding piece and hidden object puzzle.
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