Alain Pallier (France) & Marcel Doré (France)
 
Win 5+7

1.Ne6+!

1.Qf4? e1=N+! 2.Kg3 (2.Ke2? c1=Q -+ ; 2.Ke4? Rb4+ -+-)

2…Be5! 3.Qxe5 and, eg, 3…c1=Q =

1…Bxe6

2.Qxe6

2.Qxc3? Rb3 -+

2…e1=N+!

3.Kg3!

3.Ke4? (3.Kf2/4? c1=Q+ -+) 3…Rb4+ 4.Kd5 (4.Kf5? Rf4+! 5.Kg6 Rf6+ -+) 4…

Rd4+ 5.Kc6 Rxd6+ 6.Qxd6+ and White cannot make any progress, eg 6…Kf7 7.

Qf4+ Kg7 8.Qg5+ Kf8 9.Qc5+ Kf7 10.Qxc3 Nd3 =.

A) 3…Be5+

4.Kh3!

4.Qxe5? Rb3+ -+

4…Rb3+!

5.Qxb3 Bxd6

6.Qc4

(6.Qc3 Kf7 7.Qc4+ [7.Qxe1? Bf4=] 7…Ke7 etc. as below, extending solution by one move)

6.Qb2? Be5! (not 7…Bf4? 8.Qf6+ and 9.Qxf4+-) 7.Qb4+ Kf7 8.Qxe1 Bf4 =

6.Qe3? Nd3 =

6…Ke7

6 …Ba3 7.Qf4+ Ke7 8.Qe3+ and 9.Qxa3 +-

6 …Be5 7.Qf1+ and 8.Qxe1 +-

7.Qe2+!

7.Qc3(?) Kf7 8.Qc4+ is a loss of time.

7.Qc6? Bb4 =

7.Qc8? Bf4 =

7.Qe4+? Kd7 8.Qa4+ Ke6 =

7… Kd7

7…Kf7 8.Qf2+! (8.Qxe1? Bf4!=) 8…Kg8 9.Qxe1 Bf4 and, eg, 10.Qe6+ Kg7

11.Qd7+ Kg6 12.Qc6+ +-

8.Qd2!

8.Qb5+? Ke6  9.Qe2 Kd5 10.Qxe1 Kc4! (10…Bf4? 11.Qa5+ Kc4  12.Qxf4 +-)

11.Qe6+ Kc3=

8.Qxe1? Bf4 ! = (and not 8…Bb4?  9.Qc1 +-)

Now, the pinned Bishop cannot help.

8…Sd3

9.Qxc2 Sf4+

10.Kh2! +-

10.Kg3(?) Nd3+ 11.Kh3 Nf4+ 12.Kh2 is a loss of time.

Black cannot exploit the battery : after 10…Nd3+ or 10…Nd5+ 11.Kg(h)1

and White wins.

 

B) 3…Rb7

4.Qc8+!

4.Qh6+? Rg7+! (4…Bg7? 5.Qf4+ +-) 5.Kh3 Nd3 -+

4…Ke7

5.Sf5+!

5.Qxb7+? (5.Qxc3? Rb3!) 5…Kxd6 6.Qb6+ Kd5! (6…Ke5? 7.Qe3+ +- ;

6…Kd7 ? 7.Qb5+ +-) 7.Qb3+ Kd4 =

5…Kf6

6.Qxc3+

6.Qh8+? Kxf5 =

6…Kxf5

7.Qxe1

7.Qa5+? Ke4 8.Qxe1+ Kd3! =

7…Rb1

7…Rc7 8.Qa5+ +-

8.Qf2+ 

8.Qa5+? Ke4=

8…Kg6

9.Qxc2 +-