2x2

1.a3-b4

[ 1.e1-f2? b8-c7 2.a3-b4 ( 2.f2-e3 c7-d6= ) 2...c7-d6= ]
1...g7-f6 2.b4-c5 b8-c7
[ 2...f6-e5 3.c5-b6 ]
3.e1-d2! f6-g5
[ 3...f6-e5 4.c5-d6 ]
4.d2-e3 2-0

created with Aurora Borealis 3.0