[Event "Masterclass IM Floris van Assendelft 05-02-19: Studie 1"] [Site "https://lichess.org/study/fs9WWcn4/lDVFpGOK"] [Result "*"] [Variant "Standard"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vincent-SGMaxEuwe"] [FEN "1bk5/8/PK4Pr/7P/7R/3n4/8/8 w - - 0 1"] [SetUp "1"] [UTCDate "2019.02.06"] [UTCTime "18:05:34"] [Source "https://lichess.org/study/fs9WWcn4/lDVFpGOK"] [Orientation "white"] 1. a7! (1. Rc4+?! Kd7 2. Kb7 Ke7! 3. Kxb8 Rxh5 4. a7 Rb5+ 5. Kc7 Ra5 6. g7 Rxa7+ 7. Kb8 Kf7 8. Rg4 Kg8 9. Kxa7 Nc5 10. Rg6 Nd3 11. Rg5 Nf4 $10) 1... Bxa7+ (1... Bc7+ 2. Ka6 Nc5+ 3. Kb5 Kb7 4. g7 $18) 2. Kxa7 Ne5 (2... Nc5 3. Rc4! Rxh5 4. g7! Rg5 (4... Rh7 5. Rxc5+ Kd8 6. Rg5 $18) 5. Rxc5+! Rxc5 6. g8=Q+ $18) (2... Kd8 3. g7 Rh7 4. h6 Ke8 5. Rg4 Ne5 6. Ka8 $18) (2... Kc7 3. g7 Nc5 4. Ra4!! Nxa4 5. g8=Q Rxh5 6. Qf7+ $18) 3. Rc4+!! (3. g7? Nc6+! 4. Ka8 Ne7 5. Rc4+ Kd7 6. Kb7 Rxh5 7. Rc7+ Kd6 8. Rxe7 Rg5! $10) 3... Nxc4 (3... Kd8 4. g7! Rh7 5. h6 (5. Rc7? Kxc7 6. g8=Q Rxh5 $10) 5... Nxc4 (5... Ng6 6. Re4 Ne7 7. Rxe7 $18) 6. Kb8! $18) 4. g7! Rh7 5. h6 Nb6 6. Ka6 (6. Kxb6?? Rxh6+ $19) 6... Rxh6 7. g8=Q+ $18 { [%cal Bg8g7,Bg7h6] } *