206-Mate in Two SOLUTION.

Solution: 1. e3-e4! threat 2. e4-e5#
 1. ... Bc4-f7 2. Re7xf7 [B] #
 1. ... Sf2xe4+ 2. Sd2xe4 [A] #
 1. ... Sf2xg4 [a]  2. Sh6xg4 [C] #

205-Mate in two SOLUTION

Solution: 1. Qe7! [2. Re5, Sh4#]
 1. ... Bxe7 2. Re5#
 1. ... Rxe7 2. Sh4#
 1. ... Sg3+ 2. Sxg3#
 

204-Mate in 3 SOLUTION

Solution: 1. Rg1! [2. Rg7#]
 1. ... Sd6 2. Bxd6+
    2. ... Kf7/f6 3. Rf8#
 1. ... Sg5 2. Rxg5 [3. Rg7#]
    2. ... Kf7 3. Rg7#
 1. ... Sg3 2. Rxg3 [3. Rg7#]
    2. ... Kf7 3. Rg7#
 

203-White mates in two SOLUTION

Solution: 1. Be4! waiting
 1. ... Se7/b6/d6 2. B(x)d6#
 1. ... Sc6/b5 2. S(x)c6#
 1. ... g3 2. Sf3#
 

202-White mates in two SOLUTION

Solution: 1. Rg7! waiting
 1. ... b5 2. Sc5#
 1. ... Bh4/f6/e7/d8 2. Sxf4#
 1. ... Sb5/c4/c2/b1 2. B(x)c4#

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.

194-Selfmate in two. SOLUTION.

Selfmate 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.

Solution: 1. Qd1-b3! waiting
 1. ... b5-b4 2. Qb3-d5 ... c6xd5#

193-Mate in two SOLUTION.

Solution: 1. Bf1-g2! threat 2. Bg2-d5#
 1. ... Rb8-d8 2. b2-b3#
 1. ... Rb8xb2+ 2. Sd1xb2#
 1. ... f4-f3 2. Sd1-e3#

192-Mate in 2 SOLUTION

Solution: 1. Bh7-b1! waiting
 1. ... e7 ad lib 2. Sb7xd6#
 1. ... Sc6 ad lib 2. Sb7(x)a5#
 1. ... Sf2 ad lib 2. Bb1(x)d3#

191-Mate in 3 SOLUTION.

Solution: 1. Ra2-h2! threat 2. Ka1-a2 waiting
    2. ... Sg1 ad lib 3. Rh2(x)e2#
 1. ... a3-a2 2. a4-a5 waiting
    2. ... Sg1 ad lib 3. Rh2(x)e2#
 1. ... a3-a2 2. Rh2-b2 ad lib 3. Rb2-b5#
 1. ... a3-a2 2. Ka1xa2 waiting
    2. ... Sg1 ad lib 3. Rh2(x)e2#

190-Mate in Two SOLUTION

Solution: 1. Bb2-a1! waiting
 1. ... Sf8 ad lib 2. Sg5(x)e6#
 1. ... g4 ad lib 2. Sg5-f3#

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#

186-Mate in two SOLUTION.

Solution: 1. Ba2-f7! threat 2. Sb8-d7, Sa1-b3#
 1. ... Bg8xf7 2. Sb8-d7#
 1. ... Rh7xf7 2. Sa1-b3#

185-Mate in two SOLUTION.

Solution: 1. e4-e5! threat 2. Sa7-b5, Bg1-d4#
 1. ... Bh8xe5 2. Sa7-b5#
 1. ... Rh5xe5 2. Bg1-d4#
A mutual interference.

184-Mate in three SOLUTION.

Solution: 1. Rc2-c1! waiting
 1. ... a4-a3 2. Rc1-c2 waiting
    2. ... Sb5 ad lib 3. Rc2xc3#
 1. ... c3-c2 2. Rc1xc2+
    2. ... Sb5 ad lib 3. Rc2xc3#

183-Mate in two SOLUTION.

Solution: 1. Qa4-d7! threat 2. Sb4xd5, Sg1-h3#
 1. ... Bc8xd7 2. Sb4xd5#
 1. ... Rd8xd7 2. Sg1-h3#

182-Mate in three SOLUTION.

Solution: 1. Sa7-b5! threat 2. Sb5-c7#
 1. ... a6xb5 2. Bh5-g6 waiting
    2. ... Sh7 ad lib 3. Sh3(x)g5#
 1. ... a6xb5 2. Bh5-e8 waiting
    2. ... Sh7 ad lib 3. Sh3(x)g5#