The Retrograde Analysis Corner

Thema Danicum

No. 108, October 2002

8870 - Per Grevlund
Thema Danicum 108, October 2002
Dedicated to Jan Mortensen's 70th birthday
This problem was later found to be cooked.

7+2. Last 4 half-moves? (Monochromatic chess)

[2NQk3/r7/2P1RK2/B7/8/8/2P5/8]

Solution

Correction:

8870c - Per Grevlund
Thema Danicum 108, October 2002
Dedicated to Jan Mortensen's 70th birthday

7+2. Last 2.0 moves? (Monochromatic chess)

[2NRk3/r7/2P1RK2/B7/8/8/2P5/8]

Solution

8871 - Henrik Juel
Thema Danicum 108, October 2002
Dedicated to Jan Mortensen's 70th birthday

11+11. Retract one white and one black move for a h#1

[bBBbBbKB/B6B/7B/7B/B6b/b6b/1k4b1/2bbbB2]

Solution

8872 - Ivan & Gligor Denkovski
Thema Danicum 108, October 2002

10+14. Shortest proof game in 13.0 moves

[rnbqk2r/1ppp1pp1/4p2n/7K/p1P3P1/5P2/PP1PP3/R2Q4]

Solution

8873 - Unto Heinonen
Thema Danicum 108, October 2002

15+15. Shortest proof game in 28.0 moves

[q2nK1b1/ppp5/1P2pp1n/2N1b2p/4P1rP/3r2p1/P1P1PPP1/QRB1kBN1]

Solution