Who has the move?

BigDogg

Secret RHP coder

Only Chess

28 Mar 19

BigDogg

Secret RHP coder

on the payroll

Joined: 26 Nov 04
Moves: 155080

28 Mar 19

greenpawn34

e4

Joined: 06 May 08
Moves: 43363

28 Mar 19

Looking at the log jam on the Kingside the there must have been something like this. Black to move.

playing 1...g4 2....Rg5 3.g3+ Kh5

No more moves can be played there so we have to get the f1 Bishop to d1 from here.

BigDogg

Secret RHP coder

on the payroll

Joined: 26 Nov 04
Moves: 155080

29 Mar 19

@greenpawn34 said

[fen]4b1NN/3pRPrP/4pRPp/5prk/6p1/p5P1/PPK1PP2/3B4 w - - 0 1[/fen]

Looking at the log jam on the Kingside the there must have been something like this. Black to move.

[fen]8/8/8/6pr/7k/8/6P1/5B2 w - - 0 1[/fen]

playing 1...g4 2....Rg5 3.g3+ Kh5

No more moves can be played there so we have to get the f1 Bishop to d1 from here.

[fen]4b1NN/p2pRPr ...[text shortened]... ]
1. Bg2 a6 2. Bd5 a5 3. Bb3 a4 4. Bd1 a3 5. Kc2 { It is Black's move.} [/pgn]

SOLV'D

(but now you can't claim you don't know how to solve retros 😛)

greenpawn34

e4

Joined: 06 May 08
Moves: 43363

29 Mar 19

I'm getting better.

I figured out the h6 pawn must have come from g7 and the g5 pawn was at one time the h7 pawn. (I think).

BigDogg

Secret RHP coder

on the payroll

Joined: 26 Nov 04
Moves: 155080

29 Mar 19

@greenpawn34 said
I'm getting better.

[fen]4b1NN/3pRPrP/4pRPp/5prk/6p1/p5P1/PPK1PP2/3B4 w - - 0 1[/fen]
I figured out the h6 pawn must have come from g7 and the g5 pawn was at one time the h7 pawn. (I think).

That's right. WPf7 and WPg6 made 3 captures each [they are from c2 and d2]. This accounts for all of the missing Black units, thus WPh7 did not capture anything. The Black pawns must have cross-captured to let Ph7 through.