Alternatively: 2...e7f6, 3.a1h6x-c51 (3... f4e3, 4.he6-e32, 5.e61! -c58, 6.ed1+) 4.h64-f43 (4...f4e3, 5.h4f2-c18, 6.f2e1+) 5.he4-ce1, 6.e4c2-e1c1 7.ca2 (on 7.cb2-ca1 white has the wrong tempo)-ca1 8.ab2!-ab1, 9.b2a1-b18, 10.af1 and now on 10...b8f4, 11.g23+ and on 10...f3e2, 11.fe1+
