TRUNCATED PROGRESSIVE CHESS

Basic progressive chess; but giving or releasing check, promoting or
capturing may not be done in a move series, except that the series be
voluntarily shortened to length one.  (Later series are unaffected.)

Sample Game
 1. e4
 2. d5 e5
 3. e:d5
 4. Q:d5
 5. c4 d4 Bd3 Nf3 O-O
 6. Qa5 Bd6 Be6 Nc6 Nf6 O-O
 7. d5 c4 Nd2 a3 Ng5 f4 Bb2
 8. h6 Nh7 f5 e4 Bf7 Ne7 c5 Qc7
 9. N:f7
10. R:f7
11. Be2h5 h4 g3 Qc1c3 Nf3e5 Rfe1 Kg2
12. d6:e5
13. Q:e5  (if Q:Q, B:Q)
14. Q:e5
15. B:e5
16. a54 b5 Nc8b6 Nf6g4 Kh7 g6 Rd8
17. B:g4     18. f:g4     19. B:d6     20. R:B
21. R:e4     22. b:c4     23. R:c4     24. R:d5
25. b:c5     26. f5 K...f5  R...c6  R...a5
27. Ra..d6 Rc..e5++

Final Position:

. . . . . . . .
. . . . . . . .
. . r R . . p .
r . O . R k . p
p . . . . O p O
O . . . . . O .
. . . . . . K .
. . . . . . . .