1. d7 !

Thematic try:

1. Kf4 ? Nf8 ! (1...d3 ? 2. d7 ! Nf8 3. d8=Q Ne6+ 4. Ke3 ! f4+ 5. Kxd3 Nxd8 6. Ke4 ! =)

2. a5 d3 3. a6 d2 4. a7 d1=Q 5. a8=Q Qg4+ ! 6. Ke5 Nd7+ 7. Ke6 f4+ and Black wins, eg :

8. Ke7 f3 9. Qa1+ Kf2 10. Qa7+ Kg2 11. Qa8 Qg7+ 12. Ke6 Nc5+ 13. Kd5 Qb7+ -+

1....Ng5+

2. Kf4 Nf7 ! (2....Ne6+ ? 3. Kxf5 Nd8 4. Ke4 ! +-) :

3. b6 !

3. Kxf5 ? d3 ! (3....Nd8 ? 4. Ke4 ! +-) 4. Kf6 Nd8 ! (4....d2 ? 5. Kxf7 d1=Q 6. Ke7 ! =)

5. Ke7 Nb7 6. a5 d2 7. a6 d1=Q 8. axb7 Qe2+ ! 9. Kd6 Qh2+ 10. Kc6 Qb8 -+

3....Nd8

4. a5 d3

5. a6 d2

6. a7 !

6. b7 ? d1=Q 7. b8=Q Qg4+ 8. Ke5 Qg3+ -+

6....d1=Q

7. a8=Q Qg4+

8. Ke5 ! =

8. Ke3 ? Qg3+ ! -+ eg. 9. Kd4 Ne6+ 10. Kc4 Qf4+ 11. Kb3 Qe3+ 12. Ka2 Qxb6 -+