[Retros] Twisted knights

[Nicolas.Dupont at math.univ-lille1.fr]

>  There exists a

> pg with 14 thematic moves

> (P0000107 by Kornilov/Frolkin), but these moves include captures.


I wrote a short article called "Un camp intact en fin de partie
justificative"
(Phenix 167). You can find in it the following entirely thematical game
showing the sibling in 18 :

Itamar Faybish

1.Cb1-c3   Cg8-f6   2.Cc3-d5   Cf6-e4   3.Cd5xe7   Ce4-c3
4.Ce7-c6   Dd8-g5   5.Cg1-f3   Pf7-f6   6.Cf3-d4   Re8-f7
7.Cd4-b5   Rf7-g6   8.Cb5-a3   Rg6-h5   9.Ca3-b1   Ff8-a3
10.Cc6xb8   Pd7-d6   11.Cb8-d7   Th8-e8   12.Cd7-f8   Fc8-e6
13.Cf8xh7   Fe6-d5   14.Ch7-f8   Te8-e6   15.Cf8-g6   Ta8-e8
16.Cg6-f4   Rh5-h4   17.Cf4-h3   Te8-e7   18.Ch3-g1

There is no reason for that record to be the ultimate one, as "camp
intact" is a strong condition. Probably 12  in the non-capture case is
more difficult to beat, but possible in my opinion.

PS : If we ask to one side to play only knight moves, the length record is
given by the following :

Nicolas Dupont

1.Cb1-c3   Pg7-g5   2.Cc3-d5   Pg5-g4   3.Cd5xe7   Pg4-g3
4.Ce7-g6   Ff8-b4   5.Cg6-f8   Cg8-e7   6.Cf8xh7   Ce7-g6
7.Ch7-g5   Th8-h6   8.Cg5xf7   Cg6-h8   9.Cf7-e5   Th6-b6
10.Ce5-c6   Pd7-d6   11.Cc6xa7   Fc8-e6   12.Ca7-c6   Cb8-d7
13.Cc6-a5   Dd8-b8   14.Ca5xb7   Db8-a7   15.Cb7-c5   O-O-O
16.Cc5-a6   Rc8-b7   17.Ca6xc7   Td8-c8   18.Cc7-b5   Tc8-c3
19.Cb5-a3   Fe6-c4   20.Ca3-b1