Retro Problems from Issue 23
512 - Leonid N. Borodatow Quartz, No. 23, 01-03/2004
12+11. Last 7 single moves?
[NB2BK1k/b1pppP2/1p3p1b/6r1/4P3/1P6/B1PP1P1P/nb6]
513 - Ion Murarasu Quartz, No. 23, 01-03/2004
12+16. Proof game in 8.0 moves (inverse Einstein chess)
[rnbqkbnr/pppppppp/8/7K/8/8/PPPPP1P1/RNBQ2N1]
514 - Paul Raican Quartz, No. 23, 01-03/2004 (This problem was later found to be cooked)
14+15. Proof game in 27.0 moves
[r1bqkbnr/1ppppp1p/n7/KB2pP2/1PP1PB1P/1PR3P1/2NP4/6N1]