201-Mate in three SOLUTION

Solution: 1. Re7! [2. Rd7#]
 1. ... Rb4+ 2. Sxb4+
    2. ... Kd6 3. Rd7#

200-Mate in 3 SOLUTION

Solution: 1. h5! [2. Rh4#]
 1. ... g1=Q 2. Rh4+
    2. ... Qg4 3. Rxg4#
 1. ... g1=R 2. Rh4+
    2. ... Rg4 3. Rxg4#
 1. ... Sxd3 2. Rh4+
    2. ... Sf4 3. Rxf4#
 1. ... Sf3+ 2. Rxf3 [3. Rf4#]
    2. ... Bc6 3. Sxb3#

199-Mate in two SOLUTION

Solution: 1. Bg6! [2. Se6, Sc2#]
 1. ... Bxg6 2. Se6#
 1. ... Bg8, Rxg6 2. Sc2#

198-Mate in 3 SOLUTION

Solution: 1. Kc7! [2. a6 waiting
    2. ... Sd8/h8/d6/h6/e5/g5 3. R(x)e5#
    2. ... Sg7/f6/f4/g3 3. S(x)f4#
    2. ... b2 3. Ba2#
                      2. d4 [3. Rc5, Be4#]
    2. ... Sd6/g5 3. Rc5, Re5#
    2. ... Se5 3. Rxe5, Be4#
    2. ... Sf6/g3 3. Rc5, Sf4#
                      2. Rec2 [3. R2c5#]
    2. ... Sd6 3. Rxd6#
    2. ... bxc2 3. Ba2#
                      2. Re4 [3. Rd4#]
    2. ... Sd6 3. Re5#]
 1. ... a6 2. Kb6 waiting
    2. ... Sd8/h8/h6/e5/g5 3. R(x)e5#
    2. ... Sd6 3. Rc5, Re5#
    2. ... Sg7/f6/f4/g3 3. S(x)f4#
    2. ... b2 3. Ba2#
 1. ... a6 2. Rc3 waiting
    2. ... Sd8/h8/d6/h6/e5/g5 3. R(x)e5#
    2. ... Sg7/f6/f4/g3 3. S(x)f4#
    2. ... b2 3. Ba2#
 1. ... a6 2. Rc1 waiting
    2. ... Sd8/h8/d6/h6/e5/g5 3. R(x)e5#
    2. ... Sg7/f6/f4/g3 3. S(x)f4#
    2. ... b2 3. Ba2#
 1. ... a6 2. d4 [3. Rc5, Be4#]
    2. ... Sd6/g5 3. Rc5, Re5#
    2. ... Se5 3. Rxe5, Be4#
    2. ... Sf6/g3 3. Rc5, Sf4#
 1. ... a6 2. Rec2 [3. R2c5#]
    2. ... Sd6 3. Rxd6#
    2. ... bxc2 3. Ba2#
 1. ... a6 2. Re3 waiting
    2. ... Sd8/h8/d6/h6/e5/g5 3. R(x)e5#
    2. ... Sg7/f6/f4/g3 3. S(x)f4#
    2. ... b2 3. Ba2#
 1. ... a6 2. Re4 [3. Rd4#]
    2. ... Sd6 3. Re5#
 1. ... a6 2. Ree6 waiting
    2. ... Sd8/h8/d6/h6/e5/g5 3. Red6/e5#
    2. ... Sg7/f6/f4/g3 3. S(x)f4#
    2. ... b2 3. Ba2#
 1. ... a6 2. Re7 waiting
    2. ... Sd8/h8/h6/g5 3. Rd7/e5#
    2. ... Sd6/e5 3. R(x)e5#
    2. ... Sg7/f6/f4/g3 3. S(x)f4#
    2. ... b2 3. Ba2#
 1. ... a6 2. Re8 waiting
    2. ... Sd8/h8/h6/g5 3. Rxd8/e5#
    2. ... Sd6/e5 3. R(x)e5#
    2. ... Sg7/f6/f4/g3 3. S(x)f4#
    2. ... b2 3. Ba2#
 1. ... a6 2. Re1 waiting
    2. ... Sd8/h8/d6/h6/e5/g5 3. R(x)e5#
    2. ... Sg7/f6/f4/g3 3. S(x)f4#
    2. ... b2 3. Ba2#

197-Mate in 2 SOLUTION

Solution: 1. Sf6! [2. Re4#]
 1. ... Rb2+, Bb7 2. B(x)b2#
 One interference and one exchange of +.

196- White mates in two SOLUTION.

Solution: 1. Qa8! [2. Qa3#]
 1. ... Rxa8 2. Se6#
 1. ... Ra7 2. Qc6#
 1. ... Sd5 2. Qxd5#

195-Self-mate in two.

Solution: 1. Re3! [2. Rc3 ... Sg6#]
 1. ... c3 2. Rxc3 ... Sg6#

Self-mate is a chess problem where White, who plays first, must force Black to give mate in a specified number of moves, while Black tries to avoid this.