The trick is how to get rid of the Ra8. It's difficult for white to go in and get it. So how does it come out?
Proof Game
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Here's another simple yet tricky one:
Construct a game with 6.5 moves (White doing 7 and Black doing 6 moves) that ends in the following position.
Mark Kirtley & Michel Caillaud
Only one way to triangulate the bQ.
Another one:
Construct a game with 8.5 moves (White doing 9 and Black doing 8 moves) that ends in the following position.
Michael Caillaud
nonzer0 wrote:
Another one:
Construct a game with 8.5 moves (White doing 9 and Black doing 8 moves) that ends in the following position.
Michael Caillaud
2x R Schoebelen.
P. Hoffmann
PG in 4.0 moves
a) diagram b) -Qd8
a)
b)
All right, here's an easy one I made (hopefully it's not cooked)
Construct a game with 8.0 moves (White and Black each doing 8 moves) that ends in the following position.
David Stoner
nonzer0 wrote:
All right, here's an easy one I made (hopefully it's not cooked)
Construct a game with 8.0 moves (White and Black each doing 8 moves) that ends in the following position.
David Stoner
Stoner? A pen name, or real? :)
Here's what I got:
...which is unsound already; 1.Nh3 Nh6 can be substituted.
@The above: yes, it's my real name 
Also, BigDP's cook doesn't quite work, look at the pawns :P
Well, it was cooked after all... here's an adjustment which hopefully works (significantly easier now, though):
PG 8.5 moves:
nonzer0 wrote:
@The above: yes, it's my real name Also, BigDP's cook doesn't quite work, look at the pawns :P
Well, it was cooked after all... here's an adjustment which hopefully works (significantly easier now, though):
PG 8.5 moves:
Oops, left the g7 pawn.
Comp cooks the new version as follows.
BigDoggProblem wrote:
Comp cooks the new version as follows.
At least the solve is close to the intended solution 
Back to classics, anyhow:
Andrew Buchanan (7.5 moves)
K. Prentos, StrateGems 2012
after D. Pronkin
Proof Game in 20.0 moves
b) PG in 20.5
Got part a) in the above... Really nice idea. Basically, white's LSB must sac itself on c6, blacks LSB must sac itself on h3. If you try to promote then sac white's b-pawn on f6, black's DSB gets caged in, and so one of the white pieces is an imposter. A little more work gives that the imposter is a knight, and since Nb1 is closer to the sac square f6, we try that. Probably the hardest part of this was tweaking the move order until black's pieces could safely reach their squares in time (black king needs 4 moves, black queen needs 3, etc) while maneuvring the white promoted knight to b1 and the white LSB to c6. One point is that the black DSB must escape early or else be caged.
Still working on b), I suspect it's a variation of the same idea...
A variation on the theme of Pronkin, given the attribution. Instead of a Pronkin N, it's a Pronkin B. The subtlety is in the very first move: 1. b3 is needed to give white one more tempo to wait.
Remellion wrote:
A variation on the theme of Pronkin, given the attribution. Instead of a Pronkin N, it's a Pronkin B. The subtlety is in the very first move: 1. b3 is needed to give white one more tempo to wait.
Here is the predecessor.
D. Pronkin
Die Schwalbe 1985
PG in 12.5
2 solutions
Not mine. I'm wondering whether introducing short PGs (that are, unfortunately, still tricky
) to people can help them in PGs and retros in general...
Construct a game with 7.0 moves (White and Black each doing 7 moves) that ends in the following position.
Gianni Donati