8/4K2p/6pr/5pk1/1pB2R2/p4PP1/8/8 w - - bm Rg4+; id "CCC-IV No.1";
8/2pp2pp/8/2PP1P2/1p5k/8/PP4p1/6K1 w - - bm f6; id "CCC-IV No.2";
7K/6p1/8/7p/8/8/R7/6k1 w - - bm Kh7; id "CCC-IV No.3";
8/4P3/7n/5n1K/R6N/6k1/2q5/8 w - - bm e8=Q; id "CCC-IV No.4";
