[Retros] HAP-Code-variants

Bernd Gräfrath retromode at web.de
Tue Dec 4 01:45:54 EST 2007

Dear retro friends,

at the Animal-Chess-Website, Alain has pointed out the difference between the original HAP-convention (with "O" for castling) and the more economical alternative (when "H" already covers castling). I propose the names "OHAP" and "EHAP" for these variants.

Mario Richter has informed me that my previous OHAP-problem with long castling (23. Nov. 2007) is also C+ under the EHAP-convention if "5. O" is replaced by "5. H". Here it is:

1. P P 2. H H+ 3. H PxP 4. A PxA 5. H PxH+ 6. H AxH 7. A P=A 8. H A 9. AxA HxA#.

Solution (C+ in EHAP): 1. d4 c5 2. Bh6 Qa5+ 3. Qd2 cxd4 4. Nc3 dxc3 5. 0-0-0 cxd2+ 6. Kb1 Nxh6 7. Rc1 d1R 8. Ka1 Re1 9. Rxe1 Qxe1#.

Best wishes,


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