1.Qc6? zz. 1...Ka5 (a) 2.Bd2# (A), 2.Qa4# (B), 2.Qb6# (C) but 1...Ka3! (b)
1.Bd2+? (A) 1...Kc5 (c) 2.Qe5# (D) but 1...Ka3! (b)
1.Qe5? (D) threat: 2.Bf8# (E) but 1...Ka3! (b)
1.Bf8+? (E) 1...Ka5 (a) 2.Qa4# (B) but 1...Kc3! (d)
1.Qd7? zz. 1...Kc5 (c) 2.Bf8# (E) but 1...Ka3! (b)
1.Qa4+? (B) 1...Kc5 (c) 2.Qc4# (F) but 1...Kc3! (d)
1.Bg7? zz. 1...Ka3 (b) 2.Qa4# (B) but 1...Kc5! (c)
1.Qe3? zz. 1...Ka5 (a) 2.Qb6# (C) but 1...Ka3! (b)
1.Qe2! zugzwang.
1...Ka5 (a) 2.Bd2# (A) (MM)
1...Ka3 (b) 2.Bf8# (E) (MM)
1...Kc5 (c) 2.Qc4# (F)
1...Kc3 (d) 2.Qd2# (G) (MM)
Separation three mates after 1…Ka5 (a), 2x1 change mates after 1…Ka3 (b) and 1…Kc5 (c), change defence after 1…Ka3 (b) and 1…Kc5 (c), Dombrovskis paradox Hannelius paradox, Urania (2.Bf8 – key, threat, mate), change function move (key- mate) Qe5 and Qa4, black king starfish, 3x model mates.
