1.Nc6!


1.Nb5? g5 2.Kh7 Bf8–+; 1.Kh7? Be3 2.Nc6 g5–+


1...Nc5 2.Kh7!


Thematic try 2.Kg8!? Kb1!! (not 2...Kb2? 3.Ne5! Kc3 4.Ng4 Nd7 5.Kf7!=) 3.Kf7 (3.Kh7 Ne6! 4.Ne7 Nf8+ 5.Kg8 g5–+) 3...Nd3! 4.Kg6 Nf4+ 5.Kh7 circuit of bS (d3-f4-e6) 5...Ne6–+


2...Ne6 3.Kg6


Try 3.Ne7!? Nf8+ 4.Kg8 g5 5.Nf5 g4–+


3...Kb1


3...Kb2 4.Ne5 Kc3 5.Ng4 Bc1 6.Kf7=; 3...Ka2 4.Kf7 Nf4 5.Ne5 Kb3 6.Ng4=


4.Kf7! Nf4


4...Ng5+ 5.Kg6 Nf3 6.Nd8!! Bg5 7.Ne6!= (7.Nf7? Bf6–+)


5.Ne5 Kc2 6.Ng4


6.Kg8? Nh5–+


6...Kd3 7.Kg8 Ng6


7...Ke4 8.Kh7=


8.Kh7 Switchback: the wK walks around the bP.


8.Kf7? Nh4–+


8...Nf8+ 9.Kg8 Ng6 10.Kh7 Nf8+ 11.Kg8 positional draw, or 11...Ne6 12.Kf7 Nd8+ 13.Kg6 draw.  Authors