ALTERNATING WEAPON CHESS

No-capture chess plus:

First player makes one move, then players make series of two moves until
captures are made, whereupon the series become of length three, etc.

Captures may be made as a series of one move only. The first capture
may be of either type, hand-grenade(*) or machine-gun(:), (which must
make the maximum number of takes available for that particular move);
and after that each player's capture types must alternate.

During a series of non-captures it is permissible to play a piece into
a position where it could make either sort of capture but does not do so,
at the mover's choice. Declaration of ambiguous capture type is unnecessary.

r . . . . Q . .     |  1. e4               11. Ng5::
. p k r . . b .     |  2. e5 Nc6           12. Bf6:
p . p . . R . .     |  3. Nf3 c3           13. f4* +
. . N p . . . .     |  4. d5*              14. Kf7e7d7c7
O . . O . . . .     |  5. Bb5: +           15. Nd2b3c5 Qg4
. . O . . . . .     |  6. c6:              16. Be6 Rf7d7 h6
. O . . . . O O     |  7. 0-0 d4 a4        17. Qg8::
R . . . . . K .     |  8. Be7 Nf6 O-O      18. Bg7*
____________________'  9. Bh6**            19. f5f6f7f8Q Rf6
                      10. Nh7*             20. resign