GO 90

Enjoy this puzzle which was used to train KGB agents 50+ years ago..

Try this entertaining app for checking the level of observation and patience. It's here to train your brain, or just for fun. Please send us you ideas and we will make the game even better. Thanks!

What's New in the Latest Version 1.3

Last updated on Sep 2, 2015 Adeed easier levels - 30 and 60 numbers, also now it's possible to save and load progress