The Retrograde Analysis Corner
No. 86, Apr. 1997 - SOLUTIONS
7017 - Alessandro Cuppini
a) g7-g8=Q+ (5 black captures on light squares)
b) g7xNh8=B+ (allowing a previous black move)
7018 - Henrik Juel
1. g4 f5 2. g5 f4 3. g6 f3 4. gh7 fe2 5. hg8=B ef1=N 6. Bd5 Ne3
7019 - Henrik Juel
Add bBf8. Last move was g7xNf6.
Retroplay: -1. . g7xNf6 -2. Ng4-f6 Kd8-e8 -3. Ne5-g4 Kd7-d8 -4. Nc6-e5 Kc8-d7 -5. Nd8-c6 Kb8-c8 -6. d7-d8=N Kc8-b8 -7. c6xRd7 Rd8-d7 -8. b5xBc6 000 -9. a4xRb5 Bd7-c6 -10. a3-a4 Bc8-d7 -11. c3xQd4 Qd8-d4 -12. a2-a3 d7xBe6 etc.