White: Kg6, Bf4, Ph6
Black: Kd5, Bc8, Pa2,f5
White to play and win
1.Be5! Kxe5 2.h7 wins

White: Kb1,Qc2,Ne3
Black: Kb4,Qe7,Nc5,Pa4,c6
White to play and win
1.Qb2+ Nb3 2.Qa3! Kb5 (2...Kxa3, 3.Nc2 mate) 3.Qxe7 wins
Problem by Kubbel

White: Kd8,Ra8,Rc5
BlackL Kd6, Rh1
White to play and win 
1.Rh5! (to prevent 1...Rh8 mate) 1...Rxh5 2.Ra6+ Ke5 3.Ra5+
Problem by Abu al-Qasim Mansur Tusi Firdawsi (Firdausi) (940-1020) in 1010

White: Kb1,Rh2,Nd4,Nf3
Black: Kd1,Ng3,Pe2
White to play  and mate in 3
1.Nxe2 Nxe2 2.Kb2 Nd4 3.Rd2 mate  1-0
Problem by Alfred de Musset (1810-1857)

White: Kc3, Ne3, Bc7,Bf1
Black: Ke4,Ne6,Pc5
White to play and win
1.Nd5 Nxc7 (1...Kxd5?? 2.Bg2 mate) 2.Nxc7 Ke5 3.Kc4 Kd6 4.Na6 Kc6 
5.Nxc5 Kd6 6.Kd4 wins
Study by Zachokjakin

White: Kc6,Rd5, Pb5
Black: Ke6,Rb4
White to play and win
1.Rc5 (1.b6?? Rxb6) 1...Rd4 2.b6 Rd6+ 3.Kb7 Kd7 4.Ra5 Rd1 5.Ka8 wins

White:Kg2,Re8,Na5,Pd3
Black: Kc5,Qe1,Ne5
White to play and draw
1.Rxe5+ Qxe5 2.d4+ Qxd4 3.Nb3+ Kc4 4.Nxd4 draw

White: Kb6,Rh8,Nh5,Pa4,e2
Black: Kf5,Pd2,d5,f6,g6,h7
White to play and win
1.Rd8 d1=Q 2.Rxd5+ Qxd5 3.e4+ Qxe4 (3...Kxe4 4.Nxf6+) 4.Ng3+ and 5.Nxd4
Study by Berkquist

White: Kf1,Bf3,Pg2,h2
Black: Kg5,Bf5
Black to play and draw
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 draws

White: Kb3,Rh1, Pe6,g2
BlackL Kb1,Rd1,Pe2
White to play and win
1.Re1! Rxe1 2.e7 Rd1 3.e8=Q e1=Q 4.Qg6+ Ka1 5.Qf6+ mates
Study by Wotawa

White: Kg2,Qd1,Rf1,Be2,Pf3,g3
Black: Kf8,Qe4,Rh7,Bd4,Pg4
Black to play and win
1...Rh2+ 2.Kxh2 Qh7+ 3.Kg2 Qh3 mate
Problem by Bill Wall (2001)

White: Kf8,Rh1,Pg6
Black: Kh8, Bg8,Pg7,h7
White to play and mate in 2
1.Rh6 gxh6 2.g7+
1st chess effort by a computer (Dr Prinz programmed a Ferranti computer 
in 1951)

White: Ke6,Ne8,Ph5
Black: Kh8,Ng8,Ph6
White to play and win
1.Kd6 Kh7 2.Kd7 Kh8 3.Ke6 Kh7 4.Kf7 Kh8 5.Nc7 Kh7 6.Nf6 Kh8 
7.Nf8 Ne7 8.Kxe7 or 8.Ng6+ wins
Study by Bron

White: Kd5,Bh6,Pg6
Black: Kg8,Pe7,h7
White to play and win
1.g7 Kf7 2.g8+ Kxg8 3.Ke6 Kh8 4.Kf7 and 5.Bg7 mate
if 1.g7 e5 2.Ke6 e4 3.Kf6 e3 4.Bxe3 h6 4.Bxh6 Kh7 5.Kf7 wins
if 1.g7 e6 2.Kd6 Kf7 (2...e5 3.Ke6) 3.Ke5 Kg8 4.Kf6 wins
Study by Troitzky (Novoye Vremya 1895)

White: Kc6, Pd7,f5
Black: Kd8, Pg7,g5
White to play and draw
1.Kd5 Kxd7 2.Ke4 Kd6 3.Kf3 Ke5 4.Kg4 Kf6 5.Kh5 g4 (5...Kxf5 stalemate) 
6.Kxg4 =

White: Kf4,Pf5,g5,h4
Black: Kd5,Pf6,g7,h7
White to play and draw
1.Kg4 Ke4 2.g5 h6 3.Kh5 (3.h5?? Ke5) 3...Kxf5 stalemate
if 2...hxg6 3.fxg6 f5+ 4.Kg5 f4 5.h5 f3 6.h6 gxh6+ 7.Kxh6 f2 8.g7 draws

White: Kf2,Be2,Nd4
Black:  Kh8,Ba7,Bd5,Pc5,e5,h2
White to play and mate
1.Bc4 (threatening 2.Bxd5 mate) Bf3 2.Nf5 Be2 3.Ng3 mate
1.Bc4 Bxc4 2.Nf5 and 3.Ng3 mate
1.Bc4 Be4 2.Ne2 and 3.Ng3 mate
Problem by E. Kipping

White: Kh6,Bh7,Nb3,Pc3,g3,h2
Black: Kc6,Qd1,Pd5,g5
White to play and draw
1.Bc2 Qg4 (1...Qxc2 2.Nd4+) 2.Bf5 Qa4 3.Bd7+ Kxd7 4.Nc5+ Kc6 5.Nxa4
Study by Korolkov (Shakhmatny Listok 1930)

White: Kc5,Rg1,Bh3,Pb2
Black: Ka4, Qg4,Rh3,Pa5,b3,c4,d4,e4,f4,h5,h5
White to play and win
1.Bxg4 hxg4 2.Rc1 c3 3.Rd1 d3 4.Re1 e3 5.Rf1 f3 6.Rg1 g3 7.Rh1 h3 
8.Rxh3 c2 9.Rh4 mate
Problem by Korolkov (Shakhmat v SSSR 1940)

White: Kc6,Be7,Pe6
Black: Ka2,Bc1,Pc2
White to play and draw
1.Bb4 Bf4 2.Bd2 Bxd2 3.e7 c1=Q+ 4.Kd7 Bf4 5.e8=Q draws
or 1.Kd7 Bf4 2.Ba3 Kxa3 3.e7 c1=Q 4.e8=Q Qx7+ 5.Ke6 Qe5+ 6.Kf7 Qh5+ 7.Ke7 =

White: Kd5,Ne4,Ph3
Black: Kf5,Ph4
White to play and win
1.Nc3 Kf4 2.Ne2+ Kf3 3.Ng1+ Kg2 4.Ke4 Kxg1 5.Kf3 Kf1 6.Kg4 wins
if 4...Kg3 5.Kf5 Kf2 6.Kg4 wins
Study by Kubbel (Rigaer Tageblatt 1914)

White: Ka1,Qc3,Rf6,Pe7
Black: Kg8,Qd5,Re8,Be6,Pg6,h7
White to play and win
1.Rf8+ Rxf8+ 2.Qh8+ Kxh8 3.exf8=Q Bg8 4.Qf6 mate
Problem by Bill Wall (2001)

White: Kh8,Qa3,Pc7
Black: Ke8,Qb7,Rd8,Bc6,Pf7
White to play and win
1.Qf8+ Kxf8 2.cxd8=Q Be8 3.Qd6+ Qe7 4.Qh6 mate
1.Qf8+ Kd7 2.cxd8=Q+ Ke6 3.Qfd6+ Kf5 4.Q8f6+ Kg4 5.Qff4+ Kh3 6.Qg3 mate
Study by Lommer

White: Kc3,Bh3,Ph2
Black: Kf2
White to play and win
1.Bd7 Ke3 2.h4 Ke4 3.h5 Ke5 4.h6 Kf6 5.Be8 Ke7 6.h7 wins
Study by Frinck

White: Kg4,Pb4,h5
Black: Ke4,Pb5,f5
White to play and win
1.Kh3! f4 2.h6 f3 3.h7 f2 4.Kg2 wins
1.Kg5 f4 2.h6 f3 3.h7 f2 draws

White: Kd8,Qg8,Pb6
Black: Kb8,Qa2,Pb7
White to play and win
1.Qe8 Qa4 2.Qe5+ Ka8 3.Qh8 Qd4+ 4.Qxd4 Kb8 5.Qd7 Ka8 6.Qc8 mate
Study by Joseph (BCM 1922)

White: Kf2,Bf7,Bg7,Pg6
Black: Ke4,Bh5,Ph6
White to play and win
1.Bb3 Kf5 2.Bc2+ Kg5 3.Bf8 Bxg6 4.Be7+ Kh5 5.Bd1 mate
if 4...Kf4 5.Bxg6 Kg4 6.Kg2 h5 7.Be4 Kf4 8.Bf3 Kf5 9.Bxh5 wins
Study by Birnov

White: Kc2,Qf2,Nc7,Ne7
Black: Ke4
White to play and mate in 2 moves
1.Ne8 Ke5 2.Qe3 mate
Problem by Bill Wall (2001)

White: Ke1,Rh1,Nc1,Be7,Ph2
Black: Ke3,Be4,Pf4,g4
White to play and mate in 2 moves
1.Bc5+ Kf3 2.O-O mate
Sanscrit (19th century)

White: Kf2,Qf5,Bf1,Nf6
Black: Kd4, Pc6
White to play and mate in 2 moves
1.Qa5 c5 2.Qa1 mate
Problem by Brede (1844)

White: Kd1,Rf2,Bg7,Nb2,Pc4
Black: Ke3,Pc5,e4
White to play and mate in 2 moves
1.Rf6 Kd4 2.Rf3 mate
Problem by Kling (1847)

White: Ke1,Rh1,Bh6
Black: Kh8,Nb2,Pe5,h7
White to play and mate in 2 moves
1.O-O and 2.Rf8 mate