Study 175

Árpád Rusz
Strategems
2019
Honourable Mention

White wins

1. Qg6! Kb2 1... Qe2+ 2. Kd5+ Kb2 3. Qe4 Qxe4+ 4. Kxe4 +- 2. f7 Raxb4+! 2... Qe2+ 3. Kf5 Raxb4 4. Qf6+! (4. Bxb4? Rb5+! 5. Kf6?? Qe5#) 4... Kc2 5. Bxb4 Rb5+ 6. Kg6 Qg4+ (6... Qh5+ 7. Kg7 +-) 7. Kh7 Rh5+ 8. Qh6 Rxh6+ 9. Kxh6! (9. Rxh6? Qxb4 =) 9... Qxb4 10. f8=Q +- 3. Bxb4 Qe2+! 3... Rxb4+ 4. Kf5! (4. Kd5? Qe2! = mutual zugzwang) 4... Qf4+ (4... Rf4+ 5. Ke6 Qe2+ 6. Kd7 +- (6. Kd5? Rb4! = mutual zugzwang)) 5. Ke6 Qe3+ 6. Kf6 Qc3+ 7. Ke7 Rb7+ 8. Rd7 Qe5+ 9. Qe6 Qg5+ 10. Qf6+ +-

Thematic try:
4. Kd5? Rxb4 mutual zugzwang 5. f8=Q?? Rb5+ 6. Kc6 6. Kd4 Qe5+ 7. Kd3 Rb3+ 8. Kd2 Qe3+ 9. Kd1 Qc1+ 10. Ke2 Re3+ 11. Kf2 Qe1+ 12. Kg2 Re2+ 13. Kh3 Qh1+ 14. Kg4 Qg1+ 15. Kh4 Rh2# 6... Qc4+ 7. Kd7 Rb7+ 8. Ke8 Qa4+

Position X'

Unfortunately, the newly born queen blocks the escape route of the king…
9. Kd8 Qa8#

The right move is:
4. Kd4!! Triangulation 4... Rxb4+ 5. Kd5!

mutual zugzwang

5... Rb5+ 5... Qc4+ 6. Ke5 Qf4+ 7. Ke6 Qe3+ 8. Kf6 Qc3+ 9. Ke7 Rb7+ 10. Rd7 Qe5+ 11. Qe6 Qg5+ 12. Qf6+ +- 6. Kc6 Qc4+ 7. Kd7 Rb7+ 8. Ke8 Qa4+

Position X

9. Kf8! Qa8+ 10. Kg7 +-

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