No. 175, February 1999
10283 - Alexander Kisljak Die Schwalbe Heft 175, 02/1999
14+14. White plays and mates in 1
10+13. Add the White King, and then Wh. retracts 3 moves and mates in 2; Defensive retractor (Here it does not matter whether you assume Proca-retractor or Høeg-retractor)
12+11. Did Black have had a possibility of an en-passant capture in the game?
14+12. Release the position
13+13. Proof game in 23.0 moves
11+14. Proof game in 27.0 moves