Extend Gorakhpur City Halt Bob Major

EP4 Triple Mode Constraints

EP4 Triple Mode Derivation

  0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
1. Gorakhpur City Halt Bob Major 12 3456 14 56 123678 1234 58 1256 78
2. Extract places made by the hunt bell 1 - - - - - - - 8
3. Extract places above the hunt bell 2 3456 4 56 678 - 8 - -
4. Extract places below the hunt bell - - 1 - 123 1234 5 1256 7
Expand places above the hunt bell I H G F E D C B A
5. Reverse and invert places from [3] - - 1 - 123 34 5 3456 7
6. Separate into two overlapping strips - - 1 - 123 34 5 3456 7
7. Using the start change and overlap - 123 34 5 3456 7
8. Expand places above mode in [7] to next stage - 129 90 E 90ET A
9. Connect the static [6] and expanded [8] strip - - 1 - 123 34 5 3456 7 - 129 90 E 90ET A
10. Reverse and invert places in [9] back again 2 3456 4 56 6AB - 8 90ET 0 ET TAB - B - -
Expand places below the hunt bell A B C D E F G H I
11. Below places from [4] - - 1 - 123 1234 5 1256 7
12. Separate into two overlapping strips - - 1 - 123 1234 5 1256
13. Using the start change and overlap 1 - 123 1234 5 1256 7
14. Expand places above mode in [13] to next stage 1 - 123 1230 E 12ET A
15. Connect the static [12] and the expanded [14] strip - - 1 - 123 1234 5 1256 1 - 123 1230 E 12ET A
Expand places of the hunt bell A B C D E F G H I
16. Hunt bell places from [2] 1 - - - - - - - 8
17. Separate into two overlapping strips 1 - -
18. Using the start change and overlap - - - - - - - 8
19. Expand places above mode in [18] to next stage - - - - - - - - - - - B
20. Connect the static [17] and the expanded [19] strip 1 - - - - - - - - - - - - - B
Recombine above, below and hunt bell places A B C D E F G H I J K L M N O
21. Above places from [10] 2 3456 4 56 6AB - 8 90ET 0 ET TAB - B - -
22. Below places from [15] - - 1 - 123 1234 5 1256 1 - 123 1230 E 12ET A
23. Hunt bell places from [20] 1 - - - - - - - - - - - - - B
24. [Unnamed] Bob Fourteen 12 3456 14 56 1236AB 1234 58 125690ET 10 ET 123TAB 1230 EB 12ET AB

Extension and contraction candidates using extension process EP4-6/3:6:2/2:6:3/1:2:1  

13624785 Gorakhpur City Halt Bob Major 3456.14.56.123678.1234.58.1256.78,12
14257396T80BEA [Unnamed] Bob Fourteen 3456.14.56.1236AB.1234.58.125690ET.10.ET.123TAB.1230.EB.12ET.AB,12
Major Fourteen
Gorakhpur City Halt Bob Major [Unnamed] Bob Fourteen