[Retros] Construction tourney 205 Die Schwalbe

[Joost de Heer]

Thema I (Brand/Dittmann) :
Schlagschach: Shortest dual-free proofgame with a Pronkin piece
Ranking is based on the number of moves.

Theme II (Dittmann/Wenda) :
Anticirce: Construct a position in which white is stalemate, and where 
white has a maximal number of possible moves which are illegal due to 
self-check.
Example:
S1Sr2K1/5b2/6k1/8/8/8/5p2/8 (3+4)
White is stalemate, 11 illegal self-checks (Anticirce)

Ranking is based on the number of possible illegal moves, and secondly 
on the number of used pieces.

Theme III: (Dittmann)
Double maximummer. Find a proofgame in which the kings end up on 
diagonally opposing corners (a1+h8 or h1+a8). Uniqueness of the 
proofgame isn't necessary.

Ranking is based on the number of moves.

Theme IV: (Dittmann)
Duellanten chess: Exact proofgame in which as many as possible pawns 
make at least two single steps and no double step.

Ranking is based on the number of pawns making at least 2 single steps 
and no double-step, and secondly on the minimum of the number of moves used.

Example:
Dittmann
r1bqkbsr/pppppppp/8/8/PPP1P3/3s2P1/3P1P1P/RSBQKBSR (16+16)
Proofgame in 9.0 moves, duellanten chess

1. c3 Sa6 2. c4 Sc5 3. a3 Sb3 4. a4 Sa5 5. e3 Sc6 6. e4 Se5 7. g3 Sg4 8. 
b3 Se5 9. b4 Sd3