Easy to understand, impossible to master. Count to 7 by selecting numbers. Try not to lock yourself in an unsolvable situation. There is always a solution, but to find it, you would have to count to SEVEN. Can you ?
System requirements
Minimum: Requires a 64-bit processor and operating system OS: Windows Processor: 400Mhz Memory: 256 MB RAM Graphics: Any Storage: 20 MB available space