WHITE TO MOVE

White to move and win

FEN:

8/8/1p1K4/Pp6/2k1p3/8/1P6/8 w - - 0 2

I am sharing here the CHESSCom puzzle (#59358) that I failed to solve. Its pass rate is below 20%.

The puzzle itself is excellent.

However, I am dissatisfied with the so-called "target time," which is below 1 minute in the present case.

If you are not well-trained in the queens' endgames and/or not acquainted with the rare theme included in that puzzle, then hardly you can solve that puzzle in 10 minutes.

Please note that I keep in mind that you have to see the solution from beginning to end before moving any pieces! You do not "solve" the puzzle; if you are making naturally looking moves, the computer replies, and you arrive at the crucial position to start calculating the difficult move.

Thus, it is not a tactics puzzle at all. Rather, it is an endgame etude, problem.

The other obstacle is that the CHESSCom puzzles, even those with a high rating, are usually standard. 

Nevertheless, solving any such puzzle gives only 5 points, independent of its difficulty. 

I have obtained a rating above 3400 in puzzles on CHESSCom. Unfortunately, I do not believe I could progress further because, at that high level, the puzzles are less tested due to the fewer solvers. There are already too many invalid puzzles like that one, which demands that you be a Carlsen and solve in a few minutes what others are solving in one hour.

PS

Indeed, one commenter on CHESSCom writes:

"It is a study by Kubbel, BTW."