In the beginning of the game to you some value of the score is installed which limits number of courses. On a field there are game blocks with two hanging indents. The blocks settle down in the arbitrary order. In the left upper corner and in a right lower corner of a field there are special crates of a field, which are required to be connected among themselves by 'track' from blocks. Two blocks are considered joint, if they concern each other by hanging indents. On a field there are also empty crates (without blocks). These crates complicate the task.
On perimeter of a field the buttons are located. At pressing the button an appropriate line or the column of blocks turns clockwise. At click the left mouse button on the block occurs turn of a line and column, in which there is a block.
Each turn is considered as a course and reduces your score. Besides in the beginning of the game the limited number of universal blocks with four hanging indents is given to you which can be placed in empty crates. The installation of these blocks is made by right button click in an empty crate, which specifies a cursor. The number of universal crates is displayed in a special field . The amount of universal blocks can be increased after completion of a round, but can not exceed nine. If the amount of the stayed universal blocks is equal to zero, the game does not come to an end, but the block can not be placed.
The game can be completed, if the score has appeared negative or the time, given on a round has expired. If the round is completed, the new round is given. If the value of the score exceeds minimum value in tournament, your result will be placed on an appropriate place in tournament. The time for each following round, is less previous.
In the game is not guaranteed, that execution of the task without use of universal blocks always is possible.