[Retros] one man PGs

[Göran Wicklund]

One more home based piece, no more white move possible:

+---+---+---+---+---+---+---+---+
|*N |*N |*B |*Q |*K |*B |*N |*R |
+---+---+---+---+---+---+---+---+
|*P |   |*P |*P |*P |*P |*P |*P |
+---+---+---+---+---+---+---+---+
|   | . |   | . | B | . |   | . |
+---+---+---+---+---+---+---+---+
| B |   | P | P | . |   | . | K |
+---+---+---+---+---+---+---+---+
|   | . | R | R |   | P |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
|   | . |   | N | P | . | P | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . | B | . |   |
+---+---+---+---+---+---+---+---+

SPG 23.0 C+

1.d4 b6 2.Bd2 b5 3.Ba5 b4 4.Nd2 b3 5.Rc1 bxa2 6.b4 a1=N
7.b5 Nb3 8.b6 Nc5 9.b7 Ne4 10.bxa8=B Nef6 11.Bd5 Ng4
12.Be6 Nxh2 13.d5 Ng4 14.Rh4 Ne3 15.Rd4 Nxd1 16.f4 Nf2
17.c4 Nh3 18.c5 Nxg1 19.Kf2 Nf3 20.Kg3 Ne5 21.Kh4 Nc4
22.Kh5 Nb6 23.Rcc4 Na8

/Göran

From: Retros [mailto:retros-bounces at janko.at] On Behalf Of roberto osorio
Sent: den 25 maj 2016 18:13
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] one man PGs

Hi Nicolas,

this is of course a matter of opinion.

personally, I would prefer to concentrate on the core of the record, i.e.," maximum one man moves", being the other side a partenair.

Since this forces a mini-massacre, I would say that the number of captures (minimal) is the first complementary criterion, and homebased
pieces after that (this is as usual oriented to a very precise play where the parternair minimizes the necessary resources).

I think that to add an additional non-thematic move at the end is weaker than the above. But, I insist, it is a matter of opinion (on a very thin
point).

best,


2016-05-25 12:30 GMT-03:00 Nicolas Dupont <Nicolas.Dupont at univ-lille1.fr<mailto:Nicolas.Dupont at univ-lille1.fr>>:
 1. Pd2-d4   Pb7-b6     2. Fc1-d2   Pb6-b5     3. Fd2-a5   Pb5-b4
 4. Cb1-d2   Pb4-b3     5. Ta1-b1   Pb3xa2     6. Pb2-b4   Pa2-a1=C
 7. Pb4-b5   Ca1-b3     8. Pb5-b6   Cb3-c5     9. Pb6-b7   Cc5-e4
10. Pb7xa8=F Ce4-f6    11. Fa8-d5   Cf6-g4    12. Fd5-a2   Cg4xh2
13. Pd4-d5   Ch2-g4    14. Th1-h4   Cg4-e3    15. Th4-d4   Ce3xd1
16. Pf2-f4   Cd1-f2    17. Pg2-g4   Cf2-h3    18. Ff1-g2   Ch3xg1
19. Fg2-e4   Cg1-f3    20. Re1-f2   Cf3-e5    21. Fe4-g6   Ce5-c4
22. Pf4-f5   Cc4-b6    23. Rf2-e3   Cb6-a8

This is indeed a new improvement, thanks Roberto.
24.Rb6 does not improve the record, since this is 23 "one man" moves by
black (its is C+ anyway after 24.Rb6).

It depends whether the record to establish is the max of moves from the thematic side, or the max length of the game. I prefer the second option, as it asks for some more imagination to be able to add a last half-move from the non-thematic side.

Suppose there is a new improvement in 23.0 with, say, one more homebased piece but impossibility to add a last half-move. In that case I would think the record still belongs to the 23.5 game, don't you?


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