Grandmaster Game: Fischer vs Berliner

[Event "New York ch-US"]
[Date "1960.12.23"]
[Round "5"]
[Result "1-0"]
[White "Robert James Fischer"]
[Black "Hans Berliner"]
[ECO "B03"]

1. e4 Nf6 

2. e5 Nd5 

3. d4 d6 

4. c4 Nb6 

5. exd6 cxd6 

6. Nc3 g6 

7. Bd3 Bg7 

8. Nge2 Nc6 

9. Be3 O-O 

10. O-O e5 

11. d5 Ne7 

12. b3 Nd7 

13. Ne4 Nf5 

14. Bg5 f6 

15. Bd2 Nc5 

16. Nxc5 dxc5 

17. Bxf5 Bxf5 

18. f4 exf4 

19. Nxf4 Qd6 

20. Nh5 Rae8 

21. Nxg7 Kxg7 

22. Bf4 Qd7 

23. Qd2 Rf7 

24. Bh6+ Kg8 

25. Rae1 Rfe7 

26. Rxe7 Qxe7 

27. h3 Qe4 

28. Qf2 Qe7 

29. g4 Bd3 

30. Rd1 Be4 

31. d6 Qe5 

32. Bf4 Qc3 

33. d7 Rd8 

34. Qe2 Qf3 

35. Qxf3 Bxf3 

36. Bc7 1-0

Play through the game on Chessgames

Simple Checkmates: K+B+B vs K

W: Kh1, Bd1, Bb8
B: Kd5
White to play

Mate is possible in the corners and edges. Move the Bishops to diagonals next to each other.
1. Bb8-f4 already d1-h5 diag is controlled, this move controls c1-h6 diag
1. ...... Kd5-e4
2. Bf4-h6 if Bishop is attacked, go to the other side on the same diag
2. ...... Ke4-e5
3. Bd1-c2 increasing the cutoff to b1-h7 diag
3. ..... Ke5-d5
4. Bh6-g7 increasing the cutoff to a1-h8 diag
4 ..... Kd5-d6
5. Bc2-b3 increasing the cutoff to a2-g8 diag
5. ..... Kd6-c6
6. Bg7-f8 increasing the cutoff to a3-f8 diag
6. ..... Kc6-c7
7. Bb3-a4 increasing the cutoff to a4-e8 diag
7. ..... Kc7-b7
8. Bf8-b4 Kb7-a6
9. Kh1-g2 if you cannot increase the cutoff bring the King closer
9. ..... Ka6-b6
10. Kg2-f3 Kb6-a6
11. Kf3-e4 Ka6-b6
12. Ke4-d5 Kb6-a6
13. Kd5-c6 Ka6-a7
14. Bb4-a5 increasing the cutoff to a5-d8 diag
14. ..... Ka7-a6
15. Ba5-d8 if Bishop is attacked go to the other side of the same diagonal
15. ..... Ka6-a7
16. Ba4-b5 Ka7-b8
17. Bb5-a6 increasing the cutoff to a6-c8 diag
17. ..... Kb8-a7
18. Kc6-b5 Ka7-b8
19. Kb5-b6 leaving the black King with only 2 squares freedom
19. ..... Kb8-a8
20. Ba6-b7+ Ka8-b8
21. Bd8-c7#