Mentagy Puzzle. Where no mind has gone before.

Game Play

Game Rules / Objective

Insert the letters of the alphabet A through Z into the grid according to the rules below.

For each new puzzle there are seed letters already in place which cannot be moved.

Rule 1: Each new letter that you place must be either next to, directly above, directly below or on a diagonal adjacent to the previous letter of the alphabet; i.e., "D" must be next to "C"; "C" must be next to "B" etc… [ADJACENT RULE]

Rule 2: Once you place a letter in any 2x2 Box, you must finish filling in that Box before placing a letter in a new Box. [BOX RULE]

Rule 3: Any row or column may contain only one vowel (A, E , I , O , U or Y) [VOWEL RULE]

Welcome Guest Player

Play as a guest

While membership has it's benefits one does not need to sign up to play Mentagy. Follow the link below to select a puzzle. Choose from beginning, intermediate, advanced or try our expert level puzzles. After playing one of our mind expanding strategy puzzles you can save your score or just play another puzzle. Have fun and good luck.

Play as a member

Signing up for membership is very easy. All that is needed is for you to type in your email address.

Membership Benefits
  • Posting feedback
  • The feedback is available for members to post their general comments about each puzzle.

  • Notification
  • If you wish, you can be automatically notified when a new puzzle is posted.

  • Recognition.
  • When you solve a puzzle you automatically receive a score based on the level of the puzzle and how fast you solve it. If you score well your handle will be posted in the Top Ten list for that puzzle.

  • Sign-Up And Play
  • Already a Member. Sign On

Top Ten Players

  • Watergoat [Score 1053]
  • Puzzler [Score 1041]
  • annabanana [Score 1027]
  • Watergoat [Score 992]
  • TampaMom [Score 799]
  • Puzzler [Score 791]
  • pattico [Score 786]
  • TampaMom [Score 762]
  • TampaMom [Score 638]
  • TanuvasaMama [Score 560]

T=Time L=Level C=Checks E=Errors

Cyber Week Specials Going on Now!

© 2019 Mentagy

Contact & copyright info

About the game

About The Game

A Mind-Expanding Strategy Puzzle

This puzzle was created with the idea of helping my chess students, whose ages range from 6 to 15, understand certain concepts about choosing a chess move. When solving this puzzle you frequently encounter situations where you have several choices. In chess we refer to these choices as Candidate Moves. The term Candidate Move was popularized by the Russian author Alexander Kotov in his book: Think Like a Grandmaster. The methods used for determining the right choice in this puzzle are similar to the methods used for determining the best candidate move in a chess position.

Patent Information

The original idea for this puzzle was to find a simple way to illustrate certain chess ideas.  We realized very quickly how much fun it is to solve these puzzles.  The development of this puzzle and its many embodiments soon took on a life of its own, which led us to the patent application process.

About the Puzzle Inventor

Education: BS and MA in Philosophy and Math, with an emphasis in Mathematical Logic

Employment: College Teacher

Subjects: Elementary Algebra to Calculus, Logic, Statistics, Philosophy and Critical Thinking

Other Activities: Jazz musician and Chess Coach

Recent Accomplishments: In 2009-2010 two of my chess students, ages 8 and 10, won first prize in the K-12 section of the St. Petersburg Scholastic Tournament. Two others, ages 9 and 12, earned second place in the K-12 section. All four have United States Chess Federation ratings of over 1000. This means they can no longer play in the Scholastic sections, but must play in the Open (adult) Chess Tournament.

Other Accolades: Placed first in the St. Petersburg Chess Open (2006 and 2007). Victory over Master Sunil Weeramantry in New York Action Tournament (1999). Sunil is author of Best Lessons of a Chess Coach, which deserves the highest recommendation. Lost a close game to GM Alexander Ivanov in the Vermont Spring Open (2002). Ivanov was once among the top ten in the world. In April 2011 one of the Home school chess teams that Allyn coaches won the First Place Team Trophy at the monthly St Petersburg Scholastic Chess Tournament.

Contact The Owner: Send feedback or comments to the owner.

For my therapy friends

I don't usually have a reason to post much here but today I do. My son's chess coach, who is one of the nicest and most brilliant people I have ever met, has invented a new 'game'. He has a website at I have seen both the book and the board. For my therapy friends, the fine motor/cognitive component is really great for the little ones and the older ones. Suzanne Cuspilich

Quick Start

Beginners can learn the basics and then sharpen their Mentagy skills with this offline version. You simply download the puzzle to your computer then print it out. Complete with instructions and tips these puzzles will help give you the boost you need to get yourself off to a good start and perhaps even appear on the top players scoreboard.   Download here...