[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Mate in 11"] [Black "Sideways caterpillar"] [Result "*"] [Annotator "peter"] [SetUp "1"] [FEN "8/k1B4K/3N4/pppppppp/8/8/1b6/5R2 w - - 0 1"] [PlyCount "21"] [SourceVersionDate "2020.04.01"] {[#]} 1. Rb1 a4 (1... b4 2. Rxb2 a4 {transposes to the mainline}) (1... Ba3 2. Rxb5 Bb4 3. Nc8+) (1... Bc3 2. Rxb5 a4 3. Rb6 a3 4. Nc8+ Ka8 5. Rb8#) (1... Bd4 2. Rxb5 Bc3 3. Nc8+) (1... f4 2. Rxb2 f3 3. Rxb5 a4 4. Ra5#) 2. Rxb2 b4 3. Rc2 c4 4. Rd2 d4 5. Re2 e4 6. Rf2 f4 7. Rg2 g4 8. Rh2 h4 9. Rxh4 Ka6 10. Rh5 Ka7 11. Ra5# *