[Retros] recent improvements

Joost de Heer joost at sanguis.xs4all.nl
Mon Dec 18 14:58:01 EST 2006

Mario Richter schreef:

> Joost wrote:

>>> 1 Pe7xd8=N

>> I find this hard to believe. Francois Labelle (using my computer) did an

>> exhaustive search for all 11-ply games to see if there were any games

>> determined by the last move, and the only one found was Peter Roessler's

>> 6. g7xf8=N#


> The line above only says that there is only one *correct* (i.e. single-

> solution) SPG in 11 plies which ends with Pe7xd8=N#.


> There are other games in 11 plies ending with Pe7xd8=N#, e.g.

> 1.a4 b6 2.e4 d6 3.e5 Ke8-d7 4.exd6 Kd7-c6 5.dxe7 Kc6-b7 6.exd8=N#,

> but they do not constitute are correct SPG ...

OK. My apologies for misinterpreting your results.


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