[Event "Krug-50 JT"] [Site "?"] [Date "2017.??.??"] [Round "?"] [White "Rusz, Árpád"] [Black "(Study 140)"] [Result "1/2-1/2"] [Annotator "Commendation"] [SetUp "1"] [FEN "8/K7/7P/k2n4/1p1P4/3Nn3/2P5/6b1 w - - 0 1"] [PlyCount "19"] [EventDate "2017.??.??"] 1. h7 Nf5 $1 {Black doesn't capture the c2 pawn anticipating a NN/P endgame with a harmful pawn!} (1... Nxc2 2. h8=Q Bxd4+ 3. Qxd4 Nxd4 4. Nxb4 $1 Nxb4 $11 ) 2. h8=Q Bxd4+ {fork} 3. Qxd4 Nxd4 4. Nxb4 $1 (4. c4 $2 bxc3 $19 {e.p.}) (4. Kb7 $2 Nc3 $1 5. Nxb4 Kxb4 $19) 4... Nxb4 5. c4 $3 (5. c3 $2 {fork} Nbc6+ $1 ( 5... Ndc6+ $2 6. Ka8 $1 Nd3 7. c4 Nc5 {stalemate}) 6. Ka8 $5 (6. Kb7 Nd8+ 7. Kc7 N4c6 8. c4 Ka6 9. c5 Ka7 $19 {The white king cannot reach a8, the only safe corner if the pawn is blocked on c5.}) 6... Ne6 7. c4 Ka6 $1 {Black doesn't block the pawn and lets it to pass the Troitzky line!} (7... Nc5 $2 { stalemate}) 8. c5 Nc7#) 5... Ne6 6. c5 $1 {Now it is too late to stop the pawn because it has passed the Troitzky line.} Nc6+ 7. Kb7 ({or} 7. Ka8 Kb5 8. Kb7 Ned8+ 9. Ka8) 7... Ned8+ 8. Ka8 $1 {White still has to be very careful! Even if the pawn has passed the Troizky line, a8 is the only safe corner.} Ne6 (8... Kb5 {stalemate}) 9. Kb7 Ned4 10. Ka8 $1 {positional draw - fortress} (10. Kc7 $2 Ka6 $19) 1/2-1/2