bulls and cows.

in Japanese
"Squatted" in recent years on the Japanese national puzzle - Sudoku ...

sleek reckoning for 4-5 minutes, more complex - and sometimes for an hour of fun. for me to play well on the matrix looks like:) and some simple rules, and brain on one side. especially good at bedtime - it's not Tetris, of course, after which you know that dream can:)
here's another from the school caught on some nice puzzles: the cards - a pair of solitaire games (not Solitaire), number - "Bulls and Cows" (dare to guess the number with 4-5 strokes), with a rope that's at times like fun - there is all sorts of knots and not only in memory ...
Yeah, the computer has made too much diversity in the life of domestic golovolomista: here and Chinese chess, and solitaire for every taste, the only one sapper neubienny what cost? and if some games do give some charge of the brain, the greater part of modern computer puzzle trivial killer time, is not it?
and you what to play?
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