Marcel Doré (France)
 
Win 3+3

1. a5 !
1. Rc6 ? Ba5 !! = (1....Bd8 ? 2. Rc8 ! Nf7 3. a5 ! +-)
1. Kb7 ? Bxb6 ! = (1....Bd8 ? 2. a5 ! Nf7 3. Rg6+ +- see solution A)
1....Nf7
2. Kb7 !
2. a6 ? Bxb6 ! 3. Kxb6 Nd6 ! =

A) 2....Bd8
3. Rg6+ Kh7
4. a6 Kxg6
5. a7 Nd6+
6. Kc6 !
6. Ka6 ? Ne8 ! 7. Kb7 Nc7 ! = or 7. a8=Q Nc7+ =
6. Kb8 ? Bc7+ ! 7. Kxc7 Nb5+ ! = or 7. Ka8 K~ stalemate.
6....Nc4
7. a8=Q ! +-
7. a8=R ? =


B) 2....Bxb6
3. axb6 !
3. Kxb6 ? Nd6 ! =
3....Nd8+ ! (3....Nd6+ ? 4. Kc7 ! +- and not : 4. Kc6 ? Nc4! =)
4. Kc8 !
4. Kc7 ? Ne6+ ! =
4....Nc6 ! (4....Nf7 ? 5. Kc7 ! +-)
5. b7 Kf7(g7,h7)
6. Kc7 !
6. Kd7 ? Nb8+ ! 7. Kc7 Na6 ! =
6....Nb4
7. Kb6 ! +-