Step 3 Entry:

Page 1
1. ... Qa5+, ... Qxe5
2. Bd5
3. ... Rxh3+, Bxh3 Qxf3
4. Ne1
5. Be5
6. ... Ne2+, ... Rxd1
7. Kd6 Kb8, Rxe7
8. Qa6+ Kb8 or Kc7, Qb7#
9. Qc5
10. Qd3+ Ke6, Qd7#
11. d6+ Kxd6, Qxf6+
12. Bxd6+ Nxd6, Qxg3

Page 2
1. Rxd4 Qxb4, Rxb4
2. Rf7
3. Ne7+ Kh7, Rxf8
4. Ne7+
5. Qg6+ Kg8, Qxa6
6. Qe7
7. ... Rf4, Qxb7 Rxb7
8. Ba4 a6, Bxb5
9. Qa3 Rxc4, Qf8#
10. ... Rxa3, bxa3 Rxc3
11. Ne7+ Rxe7, Qxh7#
12. ... Rxc3, Qxc3 Rxe2


s/he needs 80%, i.e., at most 5 wrongs.