[Retros] one man PGs

Göran Wicklund goran.wicklund at ericsson.com
Sat May 21 00:32:19 EDT 2016 

Two sided.
Black knight captured on its home square (pawn) after a round trip of 15 moves,

+---+---+---+---+---+---+---+---+
|   |*N |   | . |*K |*B |*N |*R |
+---+---+---+---+---+---+---+---+
|*P |   | N |*P | . |*P |*P |   |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
|   | . | P | P | P | P | P | P |
+---+---+---+---+---+---+---+---+
| . | N | . |   | K |   | N | R |
+---+---+---+---+---+---+---+---+
SPG 15.5  C+ up to 12.5 and from 9,5

1.a4 c5 2.a5 c4 3.a6 c3 4.axb7 cxb2 5.bxa8=N bxa1=N 6.Nb6 Nb3 7.Nxc8 Nxc1
8.Nxe7 Na2 9.Nc6 Nc3 10.Nxd8 Nxd1 11.Ne6 Ne3 12.Ng5 Nxf1 13.Nxh7 Ne3
14.Ng5 Nd5 15.Ne6 Nc7 16.Nxc7+

/Göran


From: Retros [mailto:retros-bounces at janko.at] On Behalf Of Göran Wicklund
Sent: den 20 maj 2016 23:02
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] one man PGs

Another version in which the black knight is captured on the home
square of the original white pawn (round trip in 15 moves by the white pawn)

/Göran

+---+---+---+---+---+---+---+---+
|   |*N |   | . |*K | . |*N |*R |
+---+---+---+---+---+---+---+---+
| . |   |*P |*P |*P |*P |*P |*P |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
| P | . | N | P |   | P | P | P |
+---+---+---+---+---+---+---+---+
| . | N | . | Q | K |   | N |   |
+---+---+---+---+---+---+---+---+
SPG 14.5 C+ up to 12.5 and from 7.5
1.c4 a5 2.c5 a4 3.c6 a3 4.cxb7 axb2 5.bxa8=N bxa1=N 6.Nb6 Nb3
7.Nxc8 Nxc1 8.Na7 Nxe2 9.Nc6 Ng3 10.Nxd8 Nxh1 11.Ne6 Ng3
12.Nxf8 Nxf1 13.Ne6 Ne3 14.Nd4 Nc2+ 15.Nxc2


From: Retros [mailto:retros-bounces at janko.at]<mailto:[mailto:retros-bounces at janko.at]> On Behalf Of Göran Wicklund
Sent: den 20 maj 2016 10:38
To: 'The Retrograde Analysis Mailing List'
Subject: Re: [Retros] one man PGs

A new try:

+---+---+---+---+---+---+---+---+
|   |*N |   | . |*K | . |*N | . |
+---+---+---+---+---+---+---+---+
|*N |   |*P |*P |*P |*P |*P |*P |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| N |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
| P | . |   | P |   | P | P | P |
+---+---+---+---+---+---+---+---+
| . | N | . |   | K |   | N |   |
+---+---+---+---+---+---+---+---+

SPG 17.5 C+ up to 13.0 and from 9.5

1.c4 a5 2.c5 a4 3.c6 a3 4.cxb7 axb2 5.bxa8=N bxa1=N 6.Nb6 Nb3 7.Nxc8 Nxc1
8.Na7 Nxe2 9.Nc6 Ng3 10.Nxd8 Nxh1 11.Ne6 Ng3 12.Nxf8 Nxf1 13.Ng6 Ne3
14.Nxh8 Nxd1 15.Ng6 Nc3 16.Ne5 Nb5 17.Nc4 Na7 18.Nca3

/Göran

From: Göran Wicklund
Sent: 19 May 2016 07:41
To: The Retrograde Analysis Mailing List
Subject: RE: [Retros] one man PGs

HI,

Andrew Buchanan found a cook in the 17.5 and 18.0 games.

There is an alternative path for bN from e2 to f1:

e2-g3-h1-f2-d1-e3-f1

The 16.0 game is still not cooked.

/Göran


From: Retros [mailto:retros-bounces at janko.at] On Behalf Of Göran Wicklund
Sent: den 18 maj 2016 23:31
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] one man PGs

I added a black move:

+---+---+---+---+---+---+---+---+
|*N |*N |   | . |*K | . |*N | . |
+---+---+---+---+---+---+---+---+
| . |*P |*P |*P |*P |*P | . |*P |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |   | . | N |
+---+---+---+---+---+---+---+---+
| P | . | P | P |   | . | P | P |
+---+---+---+---+---+---+---+---+
| . | N | . |   | K |   | N |   |
+---+---+---+---+---+---+---+---+
SPG 18.0

1.f4 a5 2.f5 a4 3.f6 a3 4.fxg7 axb2 5.gxh8=N bxa1=N 6.Ng6 Nb3
7.Nxf8 Nxc1 8.Ne6 Nxe2 9.Nxd8 Nc3 10.Nc6 Nxd1 11.Na7 Nf2
12.Nxc8 Nxh1 13.Nb6 Ng3 14.Nxa8 Nxf1 15.Nb6 Ne3 16.Nd5 Nc4
17.Nf4 Nb6 18.Nfh3 Na8

/Göran

From: Retros [mailto:retros-bounces at janko.at]<mailto:[mailto:retros-bounces at janko.at]> On Behalf Of Göran Wicklund
Sent: den 18 maj 2016 20:20
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] one man PGs

Two sided, 17.5

+---+---+---+---+---+---+---+---+
|   |*N |   | . |*K | . |*N | . |
+---+---+---+---+---+---+---+---+
| . |*P |*P |*P |*P |*P | . |*P |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
|*N |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |   | . | N |
+---+---+---+---+---+---+---+---+
| P | . | P | P |   | . | P | P |
+---+---+---+---+---+---+---+---+
| . | N | . |   | K |   | N |   |
+---+---+---+---+---+---+---+---+

SPG 17.5   C+ up to 12.0 and from  9.5

1.f4 a5 2.f5 a4 3.f6 a3 4.fxg7 axb2 5.gxh8=N bxa1=N
6.Ng6 Nb3 7.Nxf8 Nxc1 8.Ne6 Nxe2 9.Nxd8 Nc3
10.Nc6 Nxd1 11.Na7 Nf2 12.Nxc8 Nxh1 13.Nb6 Ng3
14.Nxa8 Nxf1 15.Nb6 Ne3 16.Nd5 Nc4 17.Nf4 Na5 18.Nfh3

/Göran

From: Retros [mailto:retros-bounces at janko.at]<mailto:[mailto:retros-bounces at janko.at]> On Behalf Of Göran Wicklund
Sent: den 18 maj 2016 10:38
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] one man PGs

Two sided:

+---+---+---+---+---+---+---+---+
|*R |*N |   | . |*K | . |*N | . |
+---+---+---+---+---+---+---+---+
| . |   |*P |*P |*P |*P |*P |   |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   |*N |
+---+---+---+---+---+---+---+---+
| . |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
|   | . |   | . |   | . |   | . |
+---+---+---+---+---+---+---+---+
| N |   | . |   | . |   | . |   |
+---+---+---+---+---+---+---+---+
|   | P | P | P | P | P |   | P |
+---+---+---+---+---+---+---+---+
| R | N | . |   | K |   | N |   |
+---+---+---+---+---+---+---+---+
SPG 16.0  (C+ up to 13.0)

1.a4 h5 2.a5 h4 3.a6 h3 4.axb7 hxg2 5.bxc8=N gxh1=N 6.Nxa7 Ng3
7.Nc6 Nxf1 8.Nxd8 Ne3 9.Ne6 Nxd1 10.Nxf8 Nc3 11.Ng6 Na2 12.Nxh8 Nxc1
13.Ng6 Nb3 14.Ne5 Nd4 15.Nc4 Nf5 16.Nca3 Nfh6

/Göran


From: Retros [mailto:retros-bounces at janko.at]<mailto:[mailto:retros-bounces at janko.at]> On Behalf Of Francois Labelle
Sent: 17 May 2016 21:34
To: retros at janko.at<mailto:retros at janko.at>
Subject: Re: [Retros] one man PGs

Hi Roberto,

I remember a discussion about the two-sided version of "one man PGs" on the Retros mailing list in 2004 where it was called "Lazy-Spectators-SPG".

The challenge was posted at the bottom of this post:
https://pairlist1.pair.net/pipermail/retros/2004-November/000950.html

Then Michel Caillaud listed some already published At-Home Lazy-Spectators SPGs in 9.0 moves and composed some in 10.5 moves:
https://pairlist1.pair.net/pipermail/retros/2004-November/000962.html

This was followed by more attempts (often cooked) and discussion. See posts with the title "Two little SPG-challenges":
https://pairlist1.pair.net/pipermail/retros/2004-November/date.html

    François
On 17/05/16 07:28 AM, roberto osorio wrote:
Hi friends,

This is probably not a new matter, but I ask it anyway.

Have the "one man" records been explored? I mean, PGs where one or both sides
move just one piece.

Far away to pretend to be a record, I show an example (surely already done),

One side "one man"
-------------------------------------------------------------------------------------------------
1nb3k1/1pp3pp/3p4/8/1n3p2/7q/PPPPPrPP/RNBQKBNR
12.0 moves   C+

 1. Pf2-f4   Cg8-f6     2. Pf4-f5   Cf6-d5     3. Pf5-f6   Cd5-b4
 4. Pf6xe7   Pf7-f5     5. Pe7xf8=F Pf5-f4     6. Ff8-c5   Dd8-h4
 7. Fc5-f2   Dh4-h3     8. Ff2xa7   0-0        9. Fa7-c5   Ta8-a3
10. Fc5xf8   Ta3-f3    11. Ff8-c5   Pd7-d6    12. Fc5-f2   Tf3xf2


Two sided "one man"
----------------------------------------------------------------------------------------------------
rnbqkbnr/1ppp1p1p/8/8/8/8/P1PPP1PP/1NBQKBNR
7.0 moves   C+

1. Pf2-f4   Pa7-a5     2. Pf4-f5   Pa5-a4     3. Pf5-f6   Pa4-a3
 4. Pf6xg7   Pa3xb2     5. Pg7xf8=F Pb2xa1=F   6. Ff8xe7   Fa1-g7
 7. Fe7-f8   Fg7xf8


There are different tasks, lenght record, Homebase, thematic touches (Pronkin, Donati, etc).

best,
Roberto Osorio


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