189=Mate in three SOLUTION

Solution: 1. Rb1-g1! threat 2. Rg1xg4#
 1. ... g4-g3+ 2. Rg1xg3 threat 3. Rg3-g4#
    2. ... Rd6-f6+ 3. Sh7xf6#
 White king + twice..! 

188-Mate in 3 SOLUTION.

Solution: 1. Kb2! [2. Ka1 waiting
    2. ... Se8/g8/d7/h7/d5/h5/e4/g4 3. S(x)d5#
    2. ... Sa3/c3/d2 3. B(x)d2#]
 1. ... a1=Q+ 2. Kxa1 waiting
    2. ... Se8/g8/d7/h7/d5/h5/e4/g4 3. S(x)d5#
    2. ... Sa3/c3/d2 3. B(x)d2#
 1. ... a1=R 2. Kxa1 waiting
    2. ... Se8/g8/d7/h7/d5/h5/e4/g4 3. S(x)d5#
    2. ... Sa3/c3/d2 3. B(x)d2#
 1. ... a1=B+ 2. Kxa1 waiting
    2. ... Se8/g8/d7/h7/d5/h5/e4/g4 3. S(x)d5#
    2. ... Sa3/c3/d2 3. B(x)d2#
 1. ... a1=S 2. Kxa1 waiting
    2. ... Se8/g8/d7/h7/d5/h5/e4/g4 3. S(x)d5#
    2. ... Sa3/c3/d2 3. B(x)d2#

187-White mates in two SOLUTION.

Solution: 1. Kh1-g1! waiting
 1. ... Sa7 ad lib 2. Sb8(x)c6#
 1. ... Bf6 ad lib 2. Bh2(x)e5#
 1. ... Sa1 ad lib 2. Se1(x)c2#