I am trying to understand where the pieces should be located for the second Troitzky line (checkmate 2 knights vs a pawn in 50 moves limit) and fail to get it. So from wikipedia:
Black's pawn is blocked by a white knight on or behind one of the dots, White can force a win within fifty moves. If the pawn can be blocked on or behind one of the Xs, White can force a win within fifty moves more than 99 percent of the time.
The problem is that I still can not understand where the pawn and a blocking knight could be located.
Just to resolve ambiguity: I do not need to know how should white force a mate, I just need to understand which positions are possible to win with 50 moves rule. For example, are these positions a theoretical win?
[FEN "8/8/2p1N2k/8/2N5/5K2/8/8 w - - 0 1"]
[FEN "8/8/8/1N2pk2/1N6/8/8/4K3 w - - 0 1"]
[FEN "8/N7/6k1/7p/8/8/8/1K5N w - - 0 1"]