Here are some 'mate in 6' chess puzzles (rated by lichess.org).
The color disk on the diagram indicates who moves first.

Solutions are between the brackets under each puzzle.
Drag your cursor from one bracket to the other.


White mates in 6.
goorps vs younggata, lichess, (2106)
r2qnrk1/pp1bb1p1/4p3/3pP1P1/5B2/2P5/PP3PP1/R2QK2R w KQ - 1 0
[ Rh8+ Kxh8 Qh5+ Kg8 g6 Nf6 exf6 Rxf6 Qh7+ ]


White mates in 6.Nazenyuk vs Irigi, lichess, (2120)
6k1/2R3P1/p7/1p5K/1r1p4/8/7P/8 w - - 1 0
[ Kg6 Rc4 Rxc5 bxc4 h4 c3 h5 c2 h6 ]


White mates in 6.
JesVa vs alaa_tago, lichess, (2124)
1r1q1rk1/3p2pp/p3P3/n3N2P/5P2/b2B4/PPQ2P2/1K4Rb w - - 1 0
[ Bxh7+ Kh8 Ng6+ Kxh7 Nxf8+ Qh7+ Kxf8 Qxg7+ ]


Black mates in 6.
Mohamed_khairy97 vs iimmeed, lichess, (2140)
2r3k1/p1q1R2p/1p3BpQ/3b4/8/1P5P/P1P5/1K6 b - - 0 1
[ ...Qxc2+ Ka1 Qd1+ Kb2 Rc2+ Ka3 Rxa2+ Kxa2 Qxb3+ ]


[ 32... Rxb1+ 33. Kxb1 Qb6+ 34. Kc1 Qg1+ 35. Qd1 Qe3+ 36. Kb1 Qb6+ 37. Ka1 Qb2# ] (2207)


[ 34... Re5+ 35. Kg4 Kg6 36. f4 Re3 37. fxg5 fxg5 38. Rd3 Rxd3 39. Rb8 Rg3# ] (2234)


White mates in 6. Puzzle #VVZY4 (2250)
1r3r2/7k/p6P/1q2pp2/n6Q/1N3P2/1Pn3P1/1K2R3 w - - 0 32
[ 32. Qe7+ Kxh6 33. Rh1+ Kg6 34. Qh7+ Kf6 35. Rh6+ Kg5 36. Rg6+ Kf4 37. Qh6# ]


Black mates in 6. Puzzle #2T3Ft (2258)
5k1K/1p5P/8/p7/P7/1P6/8/8 b - - 0 52
[ 52... Kf7 53. b4 axb4 54. a5 b3 55. a6 b2 56. a7 b1=Q 57. a8=Q Qb2# ]


Black mates in 6. Puzzle #syzCy (2310)
5k2/ppb2Pp1/2p3P1/3p2Bp/K2n3P/3P3B/PPr5/4R3 b - - 2 33
[ 33... b5+ 34. Ka3 Bd6+ 35. b4 Bxb4+ 36. Kxb4 c5+ 37. Ka3 b4+ 38. Ka4 Rxa2# ]


[ 27... Rxg2+ 28. Kxg2 Bh3+ 29. Kxh3 Qxf1+ 30. Kg4 Qg2+ 31. Kf4 Bg5+ 32. Nxg5 hxg5# ] (2310)


[ 42. Qc8+ Kg7 43. Qf8+ Kf6 44. Qh8+ Kf5 45. Qe5+ Kg4 46. Qg5+ Kh3 47. Qh4# ] (2320)


[ 19... Nxc2+ 20. Kxa2 Qa5+ 21. Kb1 Qa1+ 22. Kxc2 Qxb2+ 23. Kd3 Rb3+ 24. Nc3 Rxc3# ] (2323)


[ 67... Rg1+ 68. Kh4 a1=Q 69. d8=Q Qe1+ 70. Kh5 Qe2+ 71. Kh6 Qh2+ 72. Qh4 Qxh4# ] (2324)


[ 27... Qxh4 28. Rxf8+ Kxf8 29. f4 Nf2+ 30. Kg1 Bxf4 31. Rxf2 Qh2+ 32. Kf1 Qh1# ] (2327)


White mates in 6. Puzzle #WeCSL (2328)
r1b2rk1/pp2pp2/3p2p1/q2n4/3N4/2PQ4/P4RPP/5RK1 w - - 0 20
[ 20. Qxg6+ fxg6 21. Rxf8+ Kh7 22. R1f7+ Kh6 23. Rh8+ Kg5 24. Nf3+ Kg4 25. Rh4# ]


[ 26. Rh8+ Kf7 27. Qxg7+ Kxg7 28. R1h7+ Kg6 29. Bh5+ Kg5 30. Rg7+ Rg6 31. Rxg6# ] (2349)


White mates in 6. Puzzle #XcunY (2362)
3r2r1/pp1k2pp/2p3n1/2P3P1/1q2P3/1B4Q1/P5PK/8 w - - 5 28
[ 28. Qd6+ Ke8 29. Qe6+ Ne7 30. Qf7+ Kd7 31. Be6+ Kc7 32. Qf4+ Rd6 33. Qxd6# ]


Black mates in 6. Puzzle #VN2Uf (2365)
1R6/r6k/2pp2rp/pp6/4q3/1P6/P2Q2PP/R1B3K1 b - - 0 23
[ 23... Rxg2+ 24. Qxg2 Qe1+ 25. Qf1 Rg7+ 26. Bg5 Rxg5+ 27. Kh1 Qe4+ 28. Qf3 Qxf3# ]


[ 15. hxg5+ Kg8 16. Rh8+ Kxh8 17. Qh5+ Kg8 18. g6 Rxf4 19. Qh7+ Kf8 20. Qh8# ] (2376)


Black mates in 6. Puzzle #XnIUT (2390)
6k1/2p2p2/K2p1Q2/1B1PpN2/P3Pp2/1nq2P2/5P2/8 b - - 0 51
[ 51... Nc5+ 52. Ka7 Qa5+ 53. Kb8 Qb6+ 54. Kc8 Qb7+ 55. Kd8 Qb8+ 56. Ke7 Qf8# ]


White mates in 6. Puzzle #L8vn6 (2406)
r2q1r2/pppbb1pk/2n1p3/3p2p1/3P3P/2N1P3/PPP2PP1/R2QK2R w KQ - 0 12
[ 12. hxg5+ Kg8 13. Rh8+ Kxh8 14. Qh5+ Kg8 15. g6 Rf5 16. Qh7+ Kf8 17. Qh8# ]


[ 29... Rd1+ 30. Kf2 Nxe4+ 31. Bxe4 Rxh2+ 32. Bg2 Rxg2+ 33. Kxg2 Qd5+ 34. Kh2 Qh1# ] (2437)


[ 32. Qxd7+ Kf8 33. Qe7+ Kg8 34. Qe8+ Kg7 35. Qh8+ Kxh8 36. Bf6+ Kg8 37. Rd8# ] (2466)


[ 43... Ne4+ 44. Rxe4 Bh4+ 45. Ke2 Ng3+ 46. Kd2 Nxe4+ 47. dxe4 Qe1+ 48. Kd3 Qe3# ] (2468)


Black mates in 6. Puzzle #mj1Rr (2470)
6rr/1p1k1p2/p3p3/3p1p2/1Q1N3q/7P/1P4P1/2R1R1K1 b - - 8 36
[ 36... Rxg2+ 37. Kxg2 Rg8+ 38. Kf1 Qxh3+ 39. Ke2 Rg2+ 40. Kd1 Qd3+ 41. Qd2 Rxd2# ]


[ 30. Rh8+ Kxh8 31. Qh6+ Kg8 32. Qf8+ Kh7 33. Rf3 Qd8 34. Rh3+ Qh4 35. Rxh4# ] (2473)


[ 38. Rxh5+ gxh5 39. Qxh5+ Kg8 40. Qg4+ Bg6 41. Re8+ Kh7 42. Qh4+ Bh5 43. Qxh5# ] (2490)


White mates in 6. Puzzle #Ge0bT (2491)
2R5/5pk1/3Bp1p1/3pP3/1P3b2/3q4/1r5P/4Q1K1 w - - 4 38
[ 38. Bf8+ Kg8 39. Be7+ Kh7 40. Qh4+ Bh6 41. Qxh6+ Kxh6 42. Rh8+ Kg7 43. Bf6# ]


[ 22. Nf6+ Kh8 23. Nh5+ f6 24. Qxf6+ Rxf6 25. Rd8+ Qe8 26. Rxe8+ Rf8 27. Rxf8# ] (2503)


[ 25. Qxg7+ Kxg7 26. Bh6+ Kxh6 27. Rh1+ Qh2+ 28. Rxh2+ Kg7 29. Rg2+ Kh8 30. Rxf8# ] (2504)


[ 21. Qxc7+ Ka8 22. Qxb7+ Kxb7 23. Rb4+ Ka8 24. Rc8+ Rxc8 25. Be4+ Rc6 26. Bxc6# ] (2505)


[ 22... Qd1+ 23. Ne1 Nd2+ 24. Kg1 Qxe1+ 25. Kh2 Nf3+ 26. Kg3 Bh4+ 27. Kxf3 Qxf2# ] (2507)


[ 16. hxg5+ Kg8 17. Rh8+ Kxh8 18. Qh5+ Kg8 19. g6 Rf5 20. Qh7+ Kf8 21. Qh8# ] (2508)


[ 34... Qh3+ 35. Kxh3 Bf1+ 36. Kg4 h5+ 37. Kxh5 Rh8+ 38. Bh7 Rxh7+ 39. Kg4 Bh3# ] (2513)


[ 17. Rxh7+ Kxh7 18. g6+ Kxg6 19. Qh5+ Kf6 20. Nd5+ Ke6 21. Bg4+ Rxg4 22. Qf5# ] (2517)


[ 24... Qh3+ 25. Kxh3 Rh5+ 26. Kg4 f5+ 27. Kf4 Bf6 28. Bd4 Be5+ 29. Bxe5 dxe5# ] (2518)


[ 22. Bg7+ Kxg7 23. Rf7+ Kg8 24. Re7+ Kh8 25. Rxh7+ Kxh7 26. Qxg6+ Kh8 27. Qh7# ] (2519)


[ 15. Bh7+ Kh8 16. Nxf7+ Rxf7 17. Ng6+ Kxh7 18. Nf8+ Kg8 19. Qh7+ Kxf8 20. Qh8# ] (2523)


[ 30... Rh4+ 31. Kxh4 g5+ 32. Kh3 g4+ 33. Kh4 Qf6+ 34. Kxh5 Qh6+ 35. Kxg4 Rf4# ] (2526)


[ 30... Qxg5+ 31. Bxg5 Rxg5+ 32. Bg4 Rxg4+ 33. Kh1 Nxf2+ 34. Rxf2 Rxc1+ 35. Rf1 Rxf1# ] (2526)


[ 26. Qxg6+ Kh8 27. Rg1 e2 28. Qxh6+ Rh7 29. Bxf6+ Qxf6 30. Qxf6+ Rxf6 31. Rg8# ] (2531)


[ 64... Kf8 65. e6 Nd7+ 66. exd7 Bd4+ 67. Kg5 Kg7 68. d8=Q f6+ 69. Qxf6+ Bxf6# ] (2531)


[ 30... Rd1+ 31. Kg2 Qe4+ 32. f3 Rd2+ 33. Kg3 Bd6+ 34. Nxd6 Qe5+ 35. f4 Qxe3# ] (2540)


[ 29... Qh2+ 30. Kf2 Qh4+ 31. g3 Qh2+ 32. Kxe1 Bxb4+ 33. Rc3 Bxc3+ 34. Kd1 Qd2# ] (2553)


[ 19. Bh7+ Kh8 20. Bxg7+ Kxg7 21. Rxf7+ Kh8 22. Qg6 Qe5 23. Rxf8+ Bxf8 24. Qg8# ] (2553)


[ 24... Rxh2+ 25. Kxh2 Qf2+ 26. Kh3 Qf3+ 27. Rg3 Rh8+ 28. Qh4 Rxh4+ 29. Kxh4 Qh5# ] (2562)


[ 37... Bh4+ 38. Kh3 Qe3+ 39. Kxh4 g5+ 40. fxg5 hxg5+ 41. Kh5 Qh3+ 42. Kxg5 Qh6# ] (2566)


[ 36. Qf7+ Kh6 37. Rh1+ Kg5 38. Rh5+ Kxh5 39. Qh7+ Kg4 40. Qh3+ Kg5 41. Qh4# ] (2575)


[ 26... Re2 27. g4+ Kg6 28. d4 Bxd4 29. Rg1 Bg2+ 30. Rxg2 Re1+ 31. Rg1 Rxg1# ] (2620)


[ 18... Rh1+ 19. Kxh1 Qh5+ 20. Kg1 exf3 21. fxg3 Ng4 22. Rxf3 Qh2+ 23. Kf1 Qh1# ] (2622)


[ 33. Qh6+ Kxf5 34. g4+ Nxg4 35. Qe6+ Kg5 36. h4+ Kh5 37. Qxg4+ Kh6 38. Qg5# ] (2631)


[ 22. Bxf6+ Rxf6 23. Nf7+ Rxf7 24. Qd4+ Rg7 25. Qxg7+ Kxg7 26. h8=Q+ Kf7 27. Rh7# ] (2634)


[ 22. Ke2 Qxh1 23. Bc3 e5 24. Bxe5 Qh6 25. Bxf7+ Rxf7 26. Qxf7+ Kh8 27. Qf8# ] (2649)


[ 17... Qh3+ 18. Kg1 Qh2+ 19. Kf1 Qh1+ 20. Bg1 Qh3+ 21. Ke2 Qg2+ 22. Bf2 Qxf2# ] (2669)


[ 28. Bg7+ Ke7 29. Qh4+ Kd6 30. Bf8+ Ne7 31. Qf6+ Kd5 32. Be4+ Kxe4 33. Qf3# ] (2674)


[ 27... Qh1+ 28. Kg4 Qh4+ 29. Kxf3 Qe4+ 30. Kf2 Bg3+ 31. Kxg3 Qf4+ 32. Kh3 Qh4# ] (2680)


[ 26. Qxf7+ Kxf7 27. Rf4+ Kg8 28. Re8+ Rxe8 29. Bxd5+ Re6 30. Bxe6+ Kh8 31. Rh4# ] (2683)


[ 21. Qa8+ Qb8 22. cxb7+ Kc7 23. Rc1+ Bxc1 24. Qa5+ Kxb7 25. Qa6+ Kc7 26. Qc6# ] (2693)


[ 46. Ng3+ Kg7 47. Nxf5+ gxf5 48. Qg5+ Kf8 49. Rd8+ Re8 50. Qh6+ Ke7 51. Qd6# ] (2697)


[ 19... Qd5 20. Nf3 Rdh8 21. Nxh2 Rxh2 22. Bf3 Rh1+ 23. Kxh1 Qh5+ 24. Kg1 Qh2# ] (2704)


[ 33. Qxg6+ hxg6 34. Rxg6+ Kf7 35. Ne7+ Nf2 36. Rxf2+ Kxe7 37. Rg7+ Rf7 38. Rfxf7# ] (2722)


[ 37... Rh1+ 38. Kg2 Rh2+ 39. Kxh2 Qxf2+ 40. Kh1 Qf3+ 41. Kg1 Qxg3+ 42. Kf1 Qg2# ] (2736)


[ 23. Rah1 Nxe5 24. Ne4 dxe4 25. g5 f6 26. gxf6 Rxf6 27. Rh8+ Kf7 28. R1h7# ] (2736)


[ 29... Rxc2+ 30. Kb4 a5+ 31. Kxa5 Bc3+ 32. bxc3 Rxa2+ 33. Kb4 Ra4+ 34. Kxc5 b6# ] (2763)


[ 36... g5 37. g4 hxg4+ 38. Kxg4 Rf4+ 39. Kh3 g4+ 40. Kg2 Ne3+ 41. Kg3 Rf3# ] (2777)


[ 43. Rb1+ Ka4 44. Qd4+ Ka5 45. Ra1+ Ba4 46. Qc5+ Ka6 47. Qxc6+ Nb6 48. Rxa4# ] (2793)


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