White to play and checkmate

The Indian Problem is a chess composition , published in 1845 by Howard Staunton in his chess magazine The Chess Player's Chronicle. A whole genre of chess compositions, the so-called Indians.
The composition was enclosed with a letter from India to Staunton, in which it was said that this problem had scoffed at the ingenuity of all who had been shown it in India. Staunton published it in the Chess Player's Chronicle , noting that this was the toughest four-move he had ever seen and that some of the best English players couldn't have solved it. He then regularly used it as a cover illustration for the chess magazine.
It was not until years later that it turned out that Staunton had received the problem from a British clergyman living in India (Reverend) named Henry Augustus Loveday (1815-1848). According to today's standards, this “original Indian” is incorrect having 9 solution

1. Bg5! waiting
1. ... b4 2. Bc1 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#

1. Be3! waiting
1. ... b4 2. Bc1 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#

1. Bc1! waiting
1. ... b4 2. Bh1 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#
1. ... b4 2. Kb1 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#
1. ... b4 2. Kb2 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#
1. ... b4 2. Rd2 waiting
2. ... b5 3. Bh1 waiting
3. ... Kf4 4. Rd4#
2. ... b5 3. Kb1 waiting
3. ... Kf4 4. Rd4#
2. ... b5 3. Kb2 waiting
3. ... Kf4 4. Rd4#
1. ... b4 2. Rd6 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#
1. ... b4 2. Rd7 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#
1. ... b4 2. Rd8 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#

1. Bh1! waiting
1. ... b4 2. Bc1 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#

1. Kb1! waiting
1. ... b4 2. Bc1 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#

1. Kb2! waiting
1. ... b4 2. Bc1 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#

1. Rd6! waiting
1. ... b4 2. Bc1 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#

1. Rd7! waiting
1. ... b4 2. Bc1 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#

1. Rd8! waiting
1. ... b4 2. Bc1 waiting
2. ... b5 3. Rd2 waiting
3. ... Kf4 4. Rd4#

compare to #50

Date added: 10/1/2022

1.Kb1! b4
2.Kc2 b5
3.Rd3 b6
4.Bxf3#

compare to #49

Date added: 10/1/2022

1. Bf4!+ Kd5
2. Re3 Nf7
3. Bc7 Nxd4
4. d8=Q+ Kc6
5. Qxd4+ Kxb5
6. Qd5+
7. ... Ka4 2. Qc4, Re4#
7. ... Ka6 2. Qa5#

Date added: 2/3/2022

1. Bb1! waiting
1. ... b2 2. Ra2 waiting
2. ... b3 3. Ra3 waiting
3. ... b4 4. Ra4 waiting
4. ... b5 5. Ra5 waiting
5. ... b6 6. Be4#

Date added: 12/3/2022

1. Bd8! waiting
1. ... Kxd8 2. Kd6 waiting
2. ... Kc8 3. Rb2 waiting
3. ... Kd8 4. Rb8#
2. ... Ke8 3. Rf2 waiting
3. ... Kd8 4. Rf8#
1. ... Kc8 2. Kc6 waiting
2. ... Kb8 3. Bb6 [4. Rd8#]
3. ... Ka8/c8 4. Rd8#
1. ... Ke8 2. Ke6 waiting
2. ... Kf8 3. Rg2 waiting
3. ... Ke8 4. Rg8#

Date added: 23/6/2022

1.K×e1 Qa1
2.h3! (tempo!) Qa2 3.h4 Qa1 4.h5 Qa2 5.h6 Qa1 6.h7 Qa2 7.h8=S! Qa1 8.Sf7 Qa2 9.Sd8 Qa1 10.Se6 Qa2 11.S×c5 Qa1 12.Se4 Qa2 13.Sd6 Qa1 14.S×c4 Qa2 15.Sa5 Qa1 16.S×b3#
2.h4? Qa2 3.h5 Qa1 4.h6 Qa2 5.h7 Qa1 6.h8=S Qa2 7.Sf7 Qa1 8.Sd8 Qa2 9.Se6 Qa1 10.S×c5 Qa2 11.Se4 Qa1 12.Sd6 Qa2 13.S×c4 Qa1 14.Sa5 Qa2

Date added: 5/1/2023

1. Bh7! [2. Ke7 [3. Re6, Rc5#]
2. ... Bf3 3. Re6, Nxf3#
2. ... Bg4 3. Rc5#]
1. ... Be2 2. Ke7 [3. Re6, Rc5#]
2. ... Bxc4 3. Rc5+
3. ... Bd5 4. Nf3#
1. ... Bg4 2. Ke7 [3. Rc5#]
2. ... Bf5 3. Re6+
3. ... Bxe6 4. Nf3#
1. ... Bh5+ 2. Ke7 [3. Re6, Rc5#]
2. ... Bg6 3. Rxg6 [4. Re6, Rg5#]
3. ... Kf5 4. Rg5#
3. ... Ke4 4. Re6#

Date added: 5/1/2023

1. Nf6! waiting
1. ... g5 2. Ng4+
2. ... Kh1 3. Kf1 waiting
3. ... h2 4. Nf2#
1. ... Kh1 2. Ng4 waiting
2. ... g5 3. Kf1 waiting
3. ... h2 4. Nf2#
2. ... h2 3. Kf1 ad lib 4. Nf2#

Date added: 12/1/2023

1. b5!
1. ... Ka8 2. b6 waiting
2. ... Kb8 3. b7 waiting
3. ... Ka7 4. Be5 waiting
4. ... Ka6 5. b8=Q [6. Qa8, Qb6#]
5. ... Ka5 6. Qb5#
1. ... Kb8 2. b6 [3. b7 waiting
3. ... Ka7 4. Be5 waiting
3. ... Ka6 4. b8=Q [6. Qa8, Qb6#]
5. ... Ka5 6. Qb5#]
2. ... Ka8 3. b7+
3. ... Kb8 4. Be5+
4. ... Ka7 5. b8=Q+
5. ... Ka6 6. Qa8/b6#
4. ... Ka7 5. b8=R waiting
5. ... Ka6 6. Ra8#
3. ... Ka7 4. Be5 waiting
4. ... Ka6 5. b8=Q [6. Qa8, Qb6#]
5. ... Ka5 6. Qb5#
2. ... Kc8 3. b7+
3. ... Kb8 4. Be5+
4. ... Ka7 5. b8=Q+
5. ... Ka6 6. Qa8/b6#
4. ... Ka7 5. b8=R waiting
5. ... Ka6 6. Ra8#
3. ... Kd8 4. Kd6 [5. b8=Q, b8=R#]
4. ... Ke8 5. Ke6 [6. b8=Q, b8=R#]
5. ... Kd8 6. b8=Q#
5. ... Kf8 6. b8=Q/R#

Date added: 12/1/2023

1. Nf3! waiting
1. ... Ka1 2. Nd4 waiting
2. ... Ka2 3. Ne2 waiting
3. ... Ka1 4. Nc1 waiting
4. ... a2 5. Nb3#
1. ... Ka1 2. Ne1 waiting
2. ... Ka2 3. Nd3 waiting
3. ... Ka1 4. Nc1 waiting
4. ... a2 5. Nb3#

Date added: 12/1/2023

1. Re8!+
1. ... Ne6 2. Ng4+
2. ... Kf5 3. Nh6+
3. ... Ke5 4. Nf7+
4. ... Kf5 5. Rxd5+
5. ... Rxd5 6. e4#
3. ... Kg5 4. Nf7+
4. ... Kf5 5. Rxd5+
5. ... Rxd5 6. e4#
2. ... Kf5 3. Rxd5+
3. ... Rxd5 4. e4+
4. ... Kg5 5. h4+
5. ... Kh5 6. Rh8#

Date added: 12/1/2023

1.Qd7+! Kxd7
2.Nxc5+
2...dxc5 3.Nxc5+ Kd8 4.Ne6+ Kd7 5.Ba4+ Bc6 6.Bxc6+ Kxe6 7.d5#
2...Kd8 3.Ne6+ Kd7 4.Nc5+ dxc5 5.Ba4+ Bc6 6.Bxc6+ Kxe6 7.d5#
2.Nxc5+
2...dxc5 3.Nxc5+ Kd8 4.Ne6+ Kd7 5.Ba4+ Bc6 6.Bxc6+ Kxe6 7.d5#
2...Kd8 3.Ne6+ Kd7 4.Nc5+ dxc5 5.Ba4+ Bc6 6.Bxc6+ Kxe6 7.d5#

Date added: 12/1/2023