by Karl Fabel - Part 1
1 - A. Troitzky Retrograde Analysis, 1915
11+12. White to play and win
[2k5/ppp4n/2p4P/K5pP/RP3p1p/p7/P1PPP1P1/2r2B1n]
Solution
2 - Dr. J. Sunyer Fairy Chess Review, 1937
12+10. Mate in 2
[4k2r/1p1p1p2/5p1P/3N1Kpp/p3NP2/P1p5/P1QPP1P1/3B4]
3 - Dr. J. Sunyer Neujahrsgru?#376;, 1930
14+10. Black to play and draw
[8/3p2pK/1p1p2p1/b7/QP1N4/RPP4P/RBpPPP1p/b1Bk4]
4 - H. Stempel Hamburger Problem-Nachrichten, 1950
14+10. White retracts his last move and mates in 1
[B4N2/p1pNp1Bp/1p2pp1P/4PkpK/5P1R/6P1/1PPPR3/3b4]
5 - B. Sommer Die Schwalbe, 1953
9+11. Proca-retractor. Wh. retracts 2 moves and mates in 1
[2kr4/ppp1pp2/2P1pp2/1P6/3q4/2PP4/1Pp1PP2/5RK1]
6 - N. Plaksin Schachmatnaja Moskva, 1969 Special Prize
10+15. Draw
[nr2k1b1/B1pppp2/pp4p1/6P1/8/2PPP3/PPpqP2P/K5br]
7 - N. Petrovic Problem, 1954 1st/2nd Prize 4th Thematic Tourney
6+1. Last 6 single moves?
[6K1/7B/4Pk2/8/6Q1/4Q3/8/B7]
8 - N. Petrovic Problem, 1967
14+11. (AP) Mate in 4
[1k3N2/bP5p/pp1PPPP1/2pPBbRB/3pppp1/8/PP6/R3K3]
9 - N. Petrovic Problem, 1959 1st Prize
14+14. Who wins?
[kNbRQqnN/prppbrPB/K1Pp1pRB/P5p1/8/p5PP/4P3/8]
10 - Valerian Onitiu 1st Prize Die Schwalbe 1934
15+10. Wh. retracts one move and mates in 1
[7N/1p1p1p1B/7R/6pP/5Ppk/2PP1Pbr/P2P1rPQ/2KR2bN]
