Kurze Beweispartien, Teil 4, Aufgabe 10

a) Weiß am Zug

b) Schwarz am Zug

1. Be2-e4  Bf7-f5
2. Be4-e5  Sg8-f6
3. Be5:f6  Be7:f6
4. Lf1-d3  Ke8-e7
5. Ld3-e4  Bf5:e4
6. Bf2-f3  Bf6-f5

1. Be2-e4  Bf7-f6
2. Lf1-c4  Bf6-f5
3. Lc4:g8  Be7-e6
4. Lg8-f7  Ke8-e7
5. Lf7-g6  Bf5:e4
6. Lg6-f5  Be6:f5
7. Bf2-f3

Cross-captures with reciprocal change: one black pawn captures the white bishop, and the other captures the white Pawn, but this arrangement is switched in the second phase.