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Grid Detective
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Grid Detective (A Free Game for Kindle)

by Amazon Digital Services
4.3 out of 5 stars  See all reviews (736 customer reviews)

Price: $0.00 includes free wireless delivery via Amazon Whispernet

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Product Description

Do you have what it takes to crack the case? Grid Detective brings classic logic puzzles to Kindle.

Test your deduction skills as you try to solve 30 puzzles of varying difficulty. Each Case File starts with a brief story that describes your objective. Based on the information in the story and 6 clues, your job is to figure out which of the dozens of possible outcomes is the correct one. Using the process of elimination and deductive reasoning, you'll deduce the correct relationship between items. For example: if A=B and A<>C, then B<>C. If you can find the unique solution that matches the facts, you've solved the mystery!

Grid Detective makes it easy to solve with features that let you delete mistakes cleanly and quickly, highlight related cells on the grid and auto-populate relevant cells when you make a deduction.

A detailed tutorial and plenty of hints make it possible for everyone to enjoy testing their logical thinking against even the hardest Case File. Crack the case today with Grid Detective!

Product Details

  • Version: 1.2 (What's new in version 1.2)
  • Release Date: August 30, 2012
  • File Size: 789 kB
  • Language: English
  • Publisher: Amazon Digital Services
  • Sold by: Amazon Digital Services, Inc.
  • ASIN: B005OR9H5S
  • Simultaneous Device Usage: Unlimited
  • Publisher License: Read
  • Average Customer Review: 4.3 out of 5 stars  See all reviews (736 customer reviews)
  • Amazon Best Sellers Rank: #1,992 Free in Kindle Store (See Top 100 Free in Kindle Store)
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Customer Reviews

Most Helpful Customer Reviews
262 of 273 people found the following review helpful
5.0 out of 5 stars Excellent free logic puzzle series from Amazon Services. September 22, 2011
A classic logic puzzle gives a list of clues, from which you much make a deduction. One of the best known is the "Who is the Engineer?" puzzle.

On a train, Smith, Robinson, and Jones are the fireman, brakeman, and the engineer, but NOT respectively. Also aboard the train are three businessmen who have the same names: a Mr. Smith, a Mr. Robinson, and a Mr. Jones.
1. Mr. Robinson Lives in Detroit.
2. The brakeman lives exactly halfway between Chicago and Detroit
3. Mr. Jones earns exactly $20,000 per year.
4. The brakeman's nearest neighbor, one of the passengers, earns exactly three times as much as the brakeman.
5. Smith beats the fireman in billiards.
6. The passenger whose name is the same as the brakeman's lives in Chicago.

Grid Detective would classify this one as Easy. In 30 excellent puzzles, a Gridwork is given with the relevant names, wages, colors, cities, or hobbies, and the cursor can mark X or O on the various squares to make deductions.

A trainer puzzle is given at the start. After that, there are 10 Easy, 10 Moderate, and 10 Hard puzzles.
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73 of 79 people found the following review helpful
5.0 out of 5 stars Warning.... Addictive! September 24, 2011
Verified Purchase
Remember the old DELL Logic books? The ones where you wore through the page erasing your marks?


An electronic version, using X and O, and auto populating the rest of the spaces with shading or the appropriate X each time you correctly figure out a clue. If you enjoyed the paper version, you'll LOVE this game.

Easy to navigate on the Kindle. X for "not an option" O for "correct answer", Space bar deletes what you have put into the square. PAGE forward to move to the next clue (which highlights the clue you are working on.)

Great Kindle distraction!

NOTE: update 10/2/11: This game will download to the new ($79) Kindle (many will not... see my review), and the 5 way can be used for the X and O (middle button with either single or double clicks. (12/26/11: but it is not ported to either the Kindle Touch or Kindle Fire).

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54 of 58 people found the following review helpful
5.0 out of 5 stars Just Love It!!! September 23, 2011
Verified Purchase
I always buy the logic problem puzzles and so when this free game came along I grabbed it. I love it, especially the fact that you csan erase and start over without destroying the paper grid :). If you like logic puzzles you will love this.
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36 of 41 people found the following review helpful
2.0 out of 5 stars Buggy October 23, 2011
This game started out great. I loved playing these kinds of puzzles when I was a kid. I was loving this, until I waited a couple days to come back to it after finishing about half of the puzzles. My place had been lost, all progress erased, and I had to start all over at the beginning. So I started at the end and worked my way backward instead. The next day yielded the same results. No history of me even having played. I deleted the game, and now my kindle loads faster than when the game was on it. Go figure.
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11 of 11 people found the following review helpful
4.0 out of 5 stars I need more October 29, 2011
Verified Purchase
This is a great game to exercise your mind. How about a paid version with at least 100 of the puzzles? I only have one complaint. When you ask to "check errors" you can have it mark the spaces or not mark them. The marks remain for the rest of the game. There should be a way to clear them. Without the marks it is difficult to tell where the errors were.
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10 of 10 people found the following review helpful
5.0 out of 5 stars More, please! November 20, 2011
Verified Purchase
Alright, Amazon, now I'm hooked and there is only one title available. I bought three of the "Logic Puzzles by the Dozen" series only to discover (not having read the reviews) that they are not Kindle interactive. We need more like this one. Anyone listening?????
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8 of 8 people found the following review helpful
5.0 out of 5 stars addictive October 6, 2011
This is the thinking woman's crack. Couldn't stop. Wanted more.. more.. more! Tried to go cold turkey but found the only way to stop was to finish all the puzzles. I did. Now I am sad.
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7 of 7 people found the following review helpful
5.0 out of 5 stars Logic puzzles without all the writing! September 25, 2011
Verified Purchase
I've always loved this type of logic puzzles, but always hated filling out the grids. One misplaced "x" could derail your whole solution. And making revisions always became messy.

This version for the Kindle makes marking and correcting MUCH easier. When you find the correct answer for one of the items, you can just mark it, and the corresponding x's are automatically filled in for you! I have not made my way through all of the puzzles yet, but I look forward to it!
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Most Recent Customer Reviews
4.0 out of 5 stars Very Easy to Use
I enjoy logic puzzles and was dubious about being able to "x" and "o" the squares and erase mistakes and such that is part of doing logic puzzles. Read more
Published 1 day ago by S. Dennis
5.0 out of 5 stars great game
loved it, but I ran our of puzzles. Are you coming out with a version 2 with some new grids?
Published 4 days ago by pam
5.0 out of 5 stars great!
I'd been looking for this after being an aficionado to the paper edition puzzles. Good to see them in digital edition as well
Published 5 days ago by Jimgon74
5.0 out of 5 stars What a brain exercise!!
Absolutely LOVE this game. You can almost feel your brain stretching. This game is slightly reminiscent of brain teasers we did back in school, where you had to use logic and... Read more
Published 11 days ago by anthropos
5.0 out of 5 stars Loved it.
These puzzles were great fun. I wish there was another volume of them. I would order them all. Really enjoyed it.
Published 17 days ago by C. Miller
3.0 out of 5 stars It's like Pixel Perfect...
...but with the tradeoff that it is always quite easier, and you don't get to create an image, just a bare grid with crosses. It's free though.
Published 22 days ago by carlosfer2201
5.0 out of 5 stars Really fun
Awesome game with 30 puzzles. I just wish the game had a sequel. Only thing bad I'd have to say (other than I wish there were more puzzles! Read more
Published 1 month ago by Mkatz
1.0 out of 5 stars Cofusing
I found this game to be incredibly confusing and difficult to understand. I love games like this normally, i just wish everything had been clearer.
Published 1 month ago by Elizabeth
5.0 out of 5 stars Fun!
I love these challenging logic puzzles, and I wish they would release more of them. A story is presented, some facts are given, and you need to solve all the details by filling in... Read more
Published 1 month ago by D. Money
5.0 out of 5 stars A mind working game
This game is frustrating, fun, time using, brain working.... I loved it! It was so much fun figuring out all the angles from just one clue! Want more!
Published 1 month ago by Shari Hancock
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Topic From this Discussion
Grid Detective -- free Kindle game
I hope we see more! My only complaint about Grid Detective is there weren't enough puzzles. Yes I know it was free :) This is me looking a gift horse in the mouth.
Oct 17, 2011 by Lisa |  See all 26 posts
Kindle Touch Update
Kindle touch does not have the screen rotation feature. All previous Kindles have.
Dec 16, 2011 by Youwon |  See all 16 posts
Kindle Touch Interface When will it be improved?
i hope, ´cause its awful and annoying O_O
Dec 29, 2011 by Israel Chavez |  See all 4 posts
Not available for the iPad app?
Jun 18, 2013 by j |  See all 2 posts
No Grid Detective for Kindle Fire
I wrote a similar app with some friends for the Kindle Fire, and Amazon has finally approved it. 1.4 is now released, and it should fix display issues and puzzle answer issues from the previous versions. Looking forward to community feedback.

Aug 28, 2012 by King Butter |  See all 8 posts
free game Be the first to reply
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