[Retros] HAP and phoenix promotions

[Mario Richter]

Dear Russell,



> Here are two attempts at showing phoenix-style promotions in HAP-notation.

> These have not been computer tested.

>

>   1. P P;  2. PxP H;  3. P HxP;  4. PxP A;  5. PxH=A+ A;  6. AxA HxA;  7.

AxP HxA; 8. AxH

Looks o.k. - my computer found only your intended solution.


>   1. P P;  2. P H;  3. P HxA;  4. PxP HxA;  5. PxH=A A;  6. A A;  7. AxP

AxP;  8. A AxA;  9. AxH

There are 10 different games which match this HAP-string, besides
the intended solution also e.g.:

1.f4 c6 2.f5 Qd8-b6 3.f6 Qb6xg1 4.fxe7 Qg1xh1 5.exf8=N Nb8-a6 6.Nb1-c3
Na6-b4
7.Nf8xd7 Nb4xa2 8. Nd7-b6 Na2xc3 9.Nb6xc8

Regards,

  mario