Step 5 Entry:

Page 1
1. ... Bc2, Rc1 Nb3+
2. Re8+ Rxe8, Rxe8 Kf7, Qh5#
3. ... Nb3+, axb3 Nc5
4. Ne6 fxe6, Qg5+
5. Rxh7+ Kxh7, Rh4+ Kg7, Qh8#
6. ... Qxg2+, Kxg2 Nf4+, Kg1 Nh3#
7. Qd4 Raf7, Nf6+
8. Rcxc4
9. h4 Rg3, Kh2
10. Rxh6 gxh6, Bf6 ..., Qg3+ Kh7, Qg7#
11. ... Rxe2, Rxe2 Nf4
12. Bc4+ Bxc4, Rd7 ..., Qxg7#

Page 2
1. Qxa6 bxa6, Ba5
2. ... Bc2, Qxc2 Qxc2, Rxc2 Rd1#
3. Rf8+ Qxf8, Bh7+ Kxh7, Qxf8
4. Rh8+ Bxh8, Qh3
5. g6+ Nxg6, Rh7#
6. Nxd6 Qxd6, Bf4
7. Rexd5 Rxd5, Qxd6
8. Na7 Rxa7, Nxc8+
9. d5, Qxd5 Qf6+, Kg8 Qxf7+, Kh8 Qf8#
10. Re7



s/he needs 80%, i.e., at most 4 wrongs.