Visiting all edges of the board 1

O. Pervakov
Sadykov-80 MT
2016
1st Prize

White wins

1. Nb6+ 1. Rxd3? Rh8 = 1... Kb8 1... Kb7 2. Rf5 Nxh7 3. Rf7+ Ka6 4. Rxh7 +- 2. Nd7+ Ka8 3. Nf8! Nxh7 4. Nxh7 e4 5. Re3 5. Rh3? Rg8+ 6. Kf2 Rg4 7. Rh2 Ka7 8. Ke3 h3! 9. Rxh3 Rg2 10. Kxe4 Rxd2 = 5... Rg8+ 6. Kh1! 6. Kh2? h3 7. Rxh3 Rg6 = 6... h3 7. Nf6 Rg2 8. Nxe4 Re2

Paralysis

9. a6! 9. Kg1? h2+ 10. Kh1 Kb8 11. a6 Ka7 = mutual zugzwang 9... Ka7 10. Kg1 h2+ 11. Kh1 mutual zugzwang 11... Ka8 11... Kxa6 12. Rxe2 (minor dual 12. Nc5+) 12... dxe2 13. Nc5+ Kb5 14. Nd3 Kc4 15. Ne1 +- The knight has visited all edges of the board!

12. Nc3 Rxd2 13. Nb5 Rb2 14. Re8#