[ 12.e1-d2 ]

[ 12...f8-e7! 13.h2-g3 ( 13.e1-d2 f6-g5 14.h4xf6 e7xg5 ; 13.b2-c3 c5-b4 14.c3-d4 b4-a3 15.d4-c5 d6xb4 16.a5xc3 e7-d6 17.h2-g3 a7-b6 18.e1-d2 b6-c5 19.g1-h2 f6-e5 ) 13...f6-e5 14.e1-d2 ( 14.h4-g5 c7-b6 15.a5xc7 d8xb6 16.e1-d2 c5-d4 17.e3xc5 b6xd4 ) 14...c7-b6 15.a5xc7 d8xb6 16.d2-c3 e7-f6 17.c1-d2 b6-a5 18.g1-h2 b8-c7 19.f4-g5 h6xf4 20.e3xe7 d6xf8 ]

[ 12...a7-b6? 13.e1-d2 b8-a7 14.f4-g5 h6xf4 15.e3xe7 d8xf6 16.d2-e3 f8-e7 17.b2-a3 f6-e5 18.e3-f4 e5xg3 19.h2xf4 c5-d4 20.c1-d2 b6-c5 21.d2-e3 d4xf2 22.g1xe3 e7-f6 23.f4-g5 f6-e5 24.g5-h6 e5-d4 25.e3-f4 d4-c3 26.h6-g7 c3-d2 27.g7-h8 ]

[ 13...f8-g7 14.b2-c3 c5-b4 15.c3-d4 b4-a3 16.g1-f2 a7-b6 17.d4-e5 f6xd4 18.e3xa7 g7-f6 19.f2-g3 f6-e5 20.c1-b2 ]

[ 13...f6-e5 14.b2-a3 e5xg3 15.h2xf4 ]

[ 14...f6-e5 15.d2-c3 e7-f6 16.b2-a3 b8-a7 17.g1-h2 f8-e7 18.a3-b4 c5xa3 19.e3-d4 ]

[ 14...b8-a7 15.b2-c3 c5-b4 16.c3-d4 b4-a3 17.g1-h2 f8-g7 18.f4-g5 h6xf4 19.e3xg5 d6-e5 20.d4-c5 b6xd4 21.g5-h6 ]

[ 16...b4-a3 17.f4-g5 h6xf4 18.e3xg5 ]

[ 17.f4-g5 h6xf4 18.e3xg5 e7-d6 19.g5xe7 d6xf8 20.c3-d4 c5xe3 21.a5xc3 ]

[ 17...b4-a3 18.c3-d4 ( 18.c3-b4 ) 18...a3xc1 19.d4-e5 f6xf2 20.g3xe1 c1xg5 21.h4xh8 ]

[ 18...f6-e5 19.e3-d4 c5xc1 ( 19...c5xg5 20.a3xe7 ) 20.a3xa7 c1xg5 21.h4xh8 ]