The endgame with a K+2Ns versus K+P is unusual because the by possessing extra P the K cannot be stalemated (provided the blockade on the P is lifted at the proper moment, of course) and therefore the stronger side can often force mate. There are technical requirements to win this ending known as the "Troitzky line" and it may require up to 115 moves. That’s theoretically speaking of course. Andor Lilienthal failed to win it twice in a six-year period in Norman-Lilienthal and against Smyslov. However, it has been won. Jakob Seitz (1898-1970) the German–Argentine master once won this ending against Znosko-Borovsky. View that game.
For several days now I have been messing around with this ending and
discovered the following position in which White also has a P. I
found it is quite difficult, there being only one first move that allows
White to force the win. I also
discovered a couple of other positions where there is only one move leading to a
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