SLOWLY PROGRESSIVE ORTHODOX CHES

Each player plays moves for both colours,
in series 1 3, 3 3, 5 5, 5 7, 7 7, 9...
Every move must be legal for an orthodox chess game

Sample Game

1.   e4    * Nh6      
2. * Ke2   * Na6      
3.   Nc3     Nf5      
4.   e:f5  * h5      
5.   Qg4   * h:g4    
6.   h3      Nb8      
7.   h:g4    a6      
8.   R:h8  * f6      
9. * Rh6   * g:h6    
10. * Ke2   * Nc6      
11.   d3      h5
12.   g:h5    Bh6
13.   B:h6  * a4
14. * b4    * a:b
15. * Bc1   * R:a2
16. * Nb1   * R:a1
17.   Nc3     Ra2
18.   N:a2    Kf7
19.   N:b4    Qf8
20.   B:f8  * K:f8
21. * h6    * N:b4
22. * h7    * N:d3
23. * h8 N  * N:f2
24.   g4      Ke8
25.   g5      Kd8
26.   g6      Ke8
27.   g7      Kd8
28    g8Q++

Final Position

. . b k . . Q N
. p p p p . . .
. . . . . p . .
. . . . . O . .
. . . . . . . .
. . . . . . . .
. . O . K n . .
. . . . . B N .

This slower progressive sequence allows more strategy since mates are not so fast to achieve and, thus, tactical positions are possible to build and develop.