Extend Petrograd Bob Triples

EP4 Dual Mode Constraints

EP4 Dual Mode Derivation

  0 1 2 3 4 5 6 7 8 9
1. Petrograd Bob Triples 127 34567 1 5 367 7 5 7
2. Extract places above the hunt bell 27 34567 - 5 67 7 - -
3. Extract places below the hunt bell - - 1 - 3 - 5 -
Expand places above the hunt bell H G F E D C B A
4. Reverse and invert places from [2] - - 1 12 3 - 12345 16
5. Separate into two overlapping strips - -
6. Using the start change and overlap - - 1 12 3 - 12345 16
7. Expand places above mode in [6] to next stage - - 1 14 5 - 14567 18
8. Connect the static [5] and expanded [7] strip - - - - 1 14 5 - 14567 18
9. Reverse and invert places in [8] back again 29 34569 - 5 69 9 - - - -
Expand places below the hunt bell A B C D E F G H
10. Below places from [3] - - 1 - 3 - 5 -
11. Separate into two overlapping strips - - 1 - 3 - 5
12. Using the start change and overlap - 5 -
13. Expand places above mode in [12] to next stage - 5 -
14. Connect the static [11] and the expanded [13] strip - - 1 - 3 - 5 - 5 -
Recombine above and below places A B C D E F G H I J
15. Above places from [9] 29 34569 - 5 69 9 - - - -
16. Below places from [14] - - 1 - 3 - 5 - 5 -
17. Default hunt bell places 1 - - - - - - - - 9
18. [Unnamed] Bob Caters 129 34569 1 5 369 9 5 9 5 9

Extension and contraction candidates using extension process EP4-2/0:2:1/5:2:5  

p 1352746 Petrograd Bob Triples 34567.1.5.367.7.5.7,127
p 135274968 [Unnamed] Bob Caters 34569.1.5.369.9.5.9.5.9,129
p 13527496E80 [Unnamed] Bob Cinques 3456E.1.5.36E.E.5.E.5.E.5.E,12E
p 13527496E8A0T [Unnamed] Bob Sextuples 3456A.1.5.36A.A.5.A.5.A.5.A.5.A,12A
p 13527496E8A0CTB [Unnamed] Bob Septuples 3456C.1.5.36C.C.5.C.5.C.5.C.5.C.5.C,12C
Triples Caters Cinques Sextuples Septuples
Petrograd Bob Triples [Unnamed] Bob Caters [Unnamed] Bob Cinques [Unnamed] Bob Sextuples [Unnamed] Bob Septuples