108-Problem Solution.

Solution: 1. Be3! waiting
 1. ... Bd7/b7/a6 2. S(x)d7#
 1. ... Bxe6 2. fxe6#
 1. ... Rf7 2. Bxg5#
 1. ... Rg8/h7+ 2. S(x)h7#
 1. ... Rg6+ 2. fxg6#
 Four crosschecks are the theme of this problem.

107-Problem Solution.

Solution: 1. Qf6! threatening [2. Qe6, Be6#]
 1. ... Rb6+ 2. Sxb6#
 1. ... Rxd6 2. Qxd6#
 1. ... Rxc5+ 2. Rxc5#
 1. ... Bxe3 2. Be6#
 1. ... Sg5/d4+ 2. Q(x)d4#
 A Threat problem that includes three crosschecks