Retro Problems from Issue 21
451 - Leonid N. Borodatow Quartz, No. 21, 07-09/2002
11+12. #3
[qn1R4/bPPP1ppp/rpPNRp2/pK1k4/p7/8/P3P3/B7]
452 - Henryk Grudzinski Quartz, No. 21, 07-09/2002 (This problem was later found to be cooked)
16+15. Proof game in 8.5 moves (Circe)
[1nbqkbnr/p1pppppr/1P5p/8/8/N2P4/P1P1PPPP/R1BQKBNR]
453 - Michel Caillaud Quartz, No. 21, 07-09/2002
14+14. Proof game in 22.0 moves
[rBbk2nr/2p2pqp/1p3p1p/1n6/4P3/2Pp4/1PPQ1P1P/RNK2BNR]
454 - Paul Raican Quartz, No. 21, 07-09/2002
12+15. Proof game in 26.5 moves
[r3rkn1/2p1p1qn/2p1pbp1/6p1/6p1/p7/1PP1P1P1/RNBQKBNR]