1.b4-c5!
[ 1.b4-a5? b6-c5 2.e1-d2 ( 2.g1-h2 e5-f4 3.e1-d2 d6-e5 ) 2...e5-f4 3.g1-h2 d6-e5 ]
1...d6xb4 2.e3-f4! e5xg3 3.g1-h2 g5-f4 4.f2-e3 f4xd2 5.e1xc7 g3-f2= 1-1

created with Aurora Borealis 3.6