1. Qxb4? Ka2!

1. Qb5? Ka2 2. Qa4+ Kb1 3. Qxb3 stalemate!

1. Qxc5! dxc5 2. d8=Q Ka2 3. Qa5+ Kb1 4. Qxc5 Ka2 5. Qa7+ Kb1 6. Qxe3 Ka2 7. Qa7+ Kb1 8. Qa4! e3 9. Qxb3 e4 10. Ke1 Kc1 11. Qd1#
1. ... Ka2? 2. Qa7+ Kb1 3. Qxe3 Ka2 4. Qa7+ Kb1 5. d8=Q (6. Qh4 7. Qxe4#) short variation!

Keywords: phenix, sacrifice of white piece (active), stalemate dissolution, flight giving key, stalemate avoidance, tempo move, tempo creation bP, annihilation, line opening, switchback, pendulum (k), square vacation, selfblock, remote selfblock