Interesting. Encourages you to keep more in your memory for sure.  Also really slows the game down but I bet that's just practice. In the end tho, it's 100% the same skills as minesweeper. Aside from the novelty, I'd rather play original with flags I suspect. I wonder if there's an extra tweek or two you could add that would make this feel more like a new way to play and less like a new UI design. Maybe if points had some value (reveal mine, protect from death etc). 

hi. I get your idea, but I don't think you realized what you did. You point out that the game mode is "no flag", but at the same time the idea of the game is generally about something else. that you can open several cells at once for a larger number of points (If I understood correctly). I also think that if you return the flags in this mode, it won't get any worse. Because the flag is a small victory and I had to recalculate the same thing 3-4 times because it was 50/50 and I had to recalculate every time I went there.