17 Se4 — Cö Lb0XC5 18 D f 2XC5 Td8X 12 19 1 ) C6X " 7 Sf 5 — g 3 20 h2X ?3 DhöXbl 21 Da7 — a8f KC8 — - C7 22 D a 8 — a5fKC7