[Retros] Construction tourney 205 Die Schwalbe

Joost de Heer joost at sanguis.xs4all.nl
Wed Mar 19 15:34:58 EDT 2008

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
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.

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

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