Test your mental math skills by quickly determining if the result of an on-screen operation is even or odd. Earn more points for faster answers and challenge friends to see who has the quickest mind. The difficulty increases as you progress.




10+ similar games compared and reviewed
Whether you want more options like Tchisla or a completely different take on the same concept, our curated list of 10+ similar apps and games has you covered. Updated for 2026 with the latest ratings and comparisons.




Test your mental math skills by quickly determining if the result of an on-screen operation is even or odd. Earn more points for faster answers and challenge friends to see who has the quickest mind. The difficulty increases as you progress.






This optical illusion puzzle game challenges players to construct impossible structures inspired by M.C. Escher's art. With a clean design and minimalistic graphics, it offers over 60 mind-bending puzzles across various geometric and spatial themes. Features include layer locking, zoom, and an in-game hint system to aid progression.





Solve logic puzzles by drawing a single loop around clues on a grid. Connect dots to form a continuous line, with no crossings or branches. Offers endless fun and intellectual challenge for puzzle enthusiasts.


This inventive puzzle game challenges your wit with over 100 unique interactive codes and ciphers. Progress by discovering clues, patterns, and utilizing integrated decoding tools. Explore a nonlinear path and uncover secrets with the freedom to save notes and screenshots.


This challenging puzzle game requires you to find a continuous circuit that visits every square on a grid without crossing itself or walls. Progress from simple grids to complex, large-scale challenges that test your abstract thinking and problem-solving skills. Hints are available to guide you when you get stuck.


This brain game offers 100 unique riddles across four themed seasons, each with its own logic and design. Inspired by classic puzzles, it challenges your intelligence with a minimalist aesthetic. Hints and solutions are available through ads.


Solve logic puzzles by partitioning a grid with walls to create islands of specific sizes. Each island must contain a clue and be isolated from others. Offers a variety of difficulty levels and features to aid gameplay.


Uncover hidden pixel art by filling grids with colored blocks based on logic clues. This game offers a unique blend of deduction, art, and fun, providing hours of mentally stimulating entertainment. Navigate large grids with an intuitive fingertip cursor and enjoy a continuously updating puzzle library.


Connect islands by drawing bridges based on the number of connections each island requires. This logic puzzle game offers a challenging yet accessible experience for all ages, sharpening cognitive skills with unique puzzles updated weekly.


Solve logic puzzles by linking clue pairs to paint paths and reveal hidden pixel-art pictures. This game offers mentally stimulating challenges with a unique fingertip cursor for precise control. Enjoy a vast collection of puzzles, weekly bonuses, and no ads.