Masyu - Alternate Corners

“Alternate Corners Puzzle" is a logical reasoning game.
HOW TO PLAY?
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1. There are several black and white pieces scattered on the chessboard;
2. Draw a closed loop on the board that goes through all the pieces;
3. If a white piece passes through a straight line, if a black piece passes through, it needs to turn 90 degrees.
4. The blank grid can be uncrossed, or it can be through by straight or turned.
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