The Retrograde Analysis Corner

diagrammes

No. 122 , Jul. 1997

3806 - Valery Liskovets
diagrammes 122, 07/1997

6+9. (PRA) Series-Helpmate in 6

[4n3/p2pRp2/6p1/7b/6p1/2pkPP2/8/R3K2R]

Solution

3807 - Alexandre Zolotarev
diagrammes 122, 07/1997

11+10. Least number of Queen moves?

[3q1rbb/5prQ/4pKPB/3pPnN1/5k2/5P2/PP2PP2/8]

Solution

3808 - Paul Raican
diagrammes 122, 07/1997
(This problem was later found to be cooked)

1+4. Proca-retractor. Retract 9 moves and help-stalemate in 1. Sentry chess + Anti-Circe

[4k3/3p3b/8/8/8/K7/6p1/8]

Solution

3809 - Jean-Michel Trillon
diagrammes 122, 07/1997

5+3. (Horizontal cylinder) Ortho-Reconstruction in 33 single moves (Wh. starts)

[8/5P1k/7P/5P2/5p2/4P2p/8/7K]

Solution

3810 - Thierry Le Gleuher
diagrammes 122, 07/1997

8+8. (Monochromatic chess) Wh. to move. Who captured wNb1?

[1n1qQ3/2ppp2k/8/7p/3P1K2/5PpR/1P4PP/8]

Solution

3811 - Mario Velucchi
diagrammes 122, 07/1997

11+13. (Monochromatic chess) Shortest proof game in 14 single moves

[rnbqk1nr/pppp1p1p/8/8/8/8/P3PPPP/1N1QKBNR]

Solution