[ 4.f2-e3 f8-g7 ( 4...e5-d4 5.g1-f2 f6-g5 6.g3-h4 f8-g7 7.h4xf6 e7xg5 8.h2-g3 g5-h4 9.d2-c3 d8-e7 10.c3xe5 g7-f6 11.e5xg7 h8xf6 12.c1-d2 f6-e5 13.b2-c3 e5-d4 14.c3xe5 h6-g5 15.f4xh6 d6xh2 16.e3-f4 e7-f6 ) 5.g3-h4 e5xg3 6.h4xf2 f6-g5 7.h2-g3 g7-f6 8.b2-c3 h8-g7 9.g3-f4 g5-h4 10.c3-b4 f6-e5 11.a1-b2 e5xg3 12.e3-d4 c5xe3 13.d2xh2 a7-b6 14.c1-d2 d6-e5 15.b2-c3 e7-d6 16.d2-e3 e5-f4 17.e3xg5 h4xf6 18.h2-g3 f6-e5 19.c3-d4 e5xc3 20.b4xd2 b6-c5 21.g3-f4 g7-f6 22.d2-c3 ]

[ 4...f8-g7 ]

[ 4...h8-g7 ]

[ 4...f6-g5 ]

[ 4...c5-b4 ]

[ 4...c7-b6 ]

[ 4...a7-b6 5.a1-b2 f6-g5 6.g3-h4 g5xe3 7.f2xf6 e7xg5 8.h4xf6 ]

[ 5.c3-b4 ]

[ 5.d2-e3 d4xb2 6.a1xc3 f6-g5 7.g3-h4 e5xg3 8.h4xf6 e7xg5 9.f2xf6 f8-e7 10.c3-d4 e7xg5 11.d4-c5 d6xb4 12.a5xc3 h8-g7 13.h2-g3 c7-d6 ]

[ 5...h8-g7? 6.g3-h4 ( 6.a3-b4 d4-e3 7.f2xd4 d6-c5 ) 6...e5xg3 7.h2xf4 d6-e5 8.f4xd6 c7xe5 ( 8...e7xc5 9.c3xe5 f6xd4 10.d2-e3 f8-e7 11.e3-f4 g7-f6 12.f4-g5 h6xf4 13.f2-e3 d4xf2 14.e1xg7 e7-f6 15.g7xe5 c7-b6 16.a5xc7 b8xf4 17.b2-c3 d8-c7 18.c3-b4 c5-d4 19.c1-b2 c7-d6 20.b4-a5 d6-e5 21.b2-c3 d4xb2 22.a3xc1 e5-d4 23.h4-g5 f4xh6 24.c1-d2 h6-g5 25.d2-e3 d4xf2 26.g1xe3 ) 9.a3-b4 b8-c7 10.d2-e3 h6-g5 11.e3xc5 g5-f4 12.e1-d2 g7-h6 ( 12...f4-g3 13.b2-a3 g3xe1 14.c5-b6 a7xc5 15.b4xb8 ) 13.g1-h2 f8-g7 14.a5-b6 c7xa5 15.b2-a3 e5-d4 16.c5xg5 h6xf4 17.f2-e3 g7-h6 18.e3xg5 h6xf4 19.d2-e3 f4xd2 20.c1xe3 ]

[ 5...f8-g7 6.a3-b4 f6-g5 7.d2-e3 g5-h4 8.e3xc5 g7-f6 9.c1-d2 h8-g7 10.f4-g5 h6xf4 11.c5-b6 a7xe3 12.f2xd4 h4xf2 13.g1xg5 f6xh4 14.d4xh8 ]

[ 6.g3-h4 g5xe3 7.d2xf4 e5xg3 8.h2xf4 ( 8.c3xe5 d6xf4 9.h4-g5 f4-e3 10.h2xd2 h6xf4 ) 8...d6-e5 9.f4xd6 c7xe5 10.c1-d2 h6-g5 11.h4xf6 e7xg5 ]

[ 6.c3-b4 g5xe3 7.d2xf4 e7-f6 8.b2-c3 d4xb2 9.b4-c5 d6xb4 10.a5xa1 d8-e7 11.f4xd6 e7xc5 12.a1-b2 c7-d6 13.b2-c3 a7-b6 14.f2-e3 b6-a5 15.e1-d2 f8-e7 16.g3-h4 f6-e5 17.h2-g3 h8-g7 18.e3-d4 c5xe3 19.d2xf4 b8-c7 20.c1-d2 c7-b6 21.d2-e3 e7-f6? ( 21...g7-f6! 22.e3-d4 b6-c5 23.d4xb6 a5xc7 24.g1-h2 c7-b6 25.c3-b4 b6-c5 26.b4-a5 h6-g5 27.f4xh6 e5-d4 28.g3-f4 d4-c3 ) 22.e3-d4 b6-c5 23.d4xb6 a5xc7 24.g1-h2 c7-b6 25.c3-b4 d6-c5 26.b4xd6 e5xc7 27.a3-b4 b6-a5 28.b4-c5 c7-d6 29.c5xg5 a5-b4 30.g5-f6 g7xe5 31.f4xd6 b4-a3 32.d6-c7 a3-b2 33.c7-d8 b2-a1 34.g3-f4 a1-b2 35.h4-g5 b2-a1 36.g5-f6 a1xh8 37.d8-f6 h8xg3 38.h2xf4 ]

[ 7...h8-g7 ]

[ 7...f8-g7 8.e1-d2 d4-e3 ( 8...g7-f6 ; 8...e7-f6 ) 9.f2xf6 e7xe3 10.d2xf4 g7-f6 11.g3-h4 h8-g7 12.c1-d2 f6-e5 13.d2-e3 e5xg3 14.h2xf4 g7-f6 15.b2-a3 ]

[ 7...a7-b6 8.b4-c5 d6xd2 9.c1xa7 ]

[ 7...c7-b6 8.a5xc7 d8xb6 9.g3-h4 e5xg3 10.c3xa5 ]

[ 8...d6-c5 9.b4xd6 f6-g5 ( 9...c7-b6 10.a5xc7 d8xb6 11.d2-e3 e5xc7 12.c3xg7 ; 9...h8-g7 10.d6-e7 f8xd6 11.d2-e3 ) 10.d2-e3 g5-h4 ( 10...c7-b6 11.a5xc7 d8xb6 12.e3xc5 b6xd4 13.g3-h4 ) 11.e3xc5 c7-b6 12.a5xc7 d8xd4 13.d6-c7 b8xd6 14.f2-e3 d4xf2 15.g3xe1 e5xg3 16.h2xf4 a7-b6 17.c1-d2 h8-g7 18.c3-d4 ]

[ 8...a7-b6 9.d2-e3 b6-c5 10.c1-d2 c5xc1 11.e3xg5 c1xe3 12.f2xf6 ]

[ 8...c7-b6 9.a5xc7 d8xb6 10.b4-c5 d6xb4 11.f4xd6 ]

[ 8...f8-e7 9.d2-e3 c7-b6 ( 9...h8-g7 10.e3xc5 c7-b6 11.a5xc7 d8xd4 12.b4-a5 b8-c7 13.c3-b4 ) 10.e3xc5 b6xd4 11.b2-a3 d4xb2 12.b4-c5 d6xb4 13.f4xf8 b2-a1 ( 13...b4-c3 14.c1-d2 c3xe1 15.a3xc1 ) 14.a3xc5 b8-c7 ( 14...a1-e5 15.f2-e3 e5-a1 16.e3-d4 a1xe5 17.g3-f4 e5xg3 18.h2xf4 ) 15.c1-b2 a1xb6 16.g3-f4 b6-d4 17.f2-e3 d4xf2 18.g1xe3 ]

[ 9...d6-c5 10.b4xd6 g5-h4 ]

[ 11...h8-g7 12.d2-e3 a7-b6 ( 12...g7-f6 13.b2-a3 a7-b6 14.c3-d4 e5xc3 15.b4xd2 f6-g5 16.d2-c3 b8-a7 17.c3-b4 b6-c5 18.e3-d4 c5xe3 19.f4xd2 d6-e5 20.d2-c3 c7-d6 21.c3-d4 e5xc3 22.b4xd2 d6-e5 23.a3-b4 a7-b6 24.a5xc7 d8xb6 25.b4-c5 b6xd4 26.d2-e3 ) 13.e3-d4 g7-f6 14.b2-a3 b8-a7 15.b4-c5 d6xd2 16.f4xb8 d2-c1 17.a5xc7 d8xb6 18.b8-d6 c1-g5 19.d6-b4 b6-a5 20.b4-c3 f6-e5 21.d4xf6 g5xe7 22.g3-f4 ]

[ 13.d2-e3 d8-e7 14.e3xc5 d6xd2 15.f4xf8 d2-c1 16.b2-c3 h6-g5 17.g3-f4 g5xe3 18.f2xd4 ]