I got those with playing chess in my dreams. Always some difficult position that I need to find the best move in and when I finally do, the board size grows and

I got those with playing chess in my dreams. Always some difficult position that I need to find the best move in and when I finally do, the board size grows and somewhere "over there" is a bishop or a rook or so screwing up my whole previous plan, making me have to think all over again, but with a bigger board and an even more difficult situation. Woke up from those somewhat with a headache, not well rested.