[Event "Marwitz 100 MT"] [Site "?"] [Date "2016.??.??"] [Round "?"] [White "(1) Árpád Rusz (ROU)"] [Black "?"] [Result "1-0"] [Annotator "Special Prize (version)"] [SetUp "1"] [FEN "K6Q/5Prr/8/8/8/5p1p/k1P5/8 w - - 0 1"] [PlyCount "107"] {The try, the thematic try, and the solution all feature different systematic movements.} 1. Qxh7 $1 ({Try:} 1. f8=Q $2 Ra7+ $1 (1... Rxh8 $2 2. Qxh8 f2 3. Qxh3 $18) 2. Kb8 Rab7+ $1 (2... Rhb7+ $2 3. Kc8 Rc7+ 4. Kd8 Rd7+ 5. Ke8 Re7+ 6. Qxe7 $18) 3. Kc8 Rbc7+ 4. Kd8 Rcd7+ 5. Ke8 Rde7+ 6. Qxe7 (6. Kd8 Rd7+ { perpetual check}) 6... Rxh8+ 7. Kd7 h2 8. Qf7+ Kb1 9. Qb3+ Kc1 $11 (9... Ka1 $2 10. Qc3+ $18)) ({Getting another queen didn't work so white has to try capturing one of the rooks before promotion. At first sight, it seems more logical to leave a rook on g7 (and not on h7 behind a passed pawn). Thematic try:} 1. Qxg7 $2 Rxg7 2. f8=Q h2 $1 3. Qxf3 Rg8+ $3 {Paradoxically, black lets the white king to escape from the eight rank!} ({The immediate} 3... Rg1 $2 { loses because of a Queen staircase on the a and b-files from b3 to b8!} 4. Qb3+ Ka1 5. Qa3+ Kb1 6. Qb4+ Ka1 (6... Kc1 7. Qf4+ $18) 7. Qa5+ Kb1 8. Qb6+ Ka1 ( 8... Kc1 9. Qh6+ $18) 9. Qa7+ Kb1 10. Qb8+ $18) (3... Rh7 $2 {would lose after} 4. Qh1 $18) 4. Kb7 Rg1 $1 {Only now!} ({Another check would be fatal:} 4... Rg7+ $2 5. Kc8 $3 {In order to win, the white king needs to go back to the 8th rank!} (5. Kc6 $2 Rg1 6. Qb3+ Ka1 7. Qa3+ Kb1 8. Qb4+ Ka1 9. Qa5+ Kb1 10. Qb6+ Kc1 $1 $11 {and 11.Qh6+ is impossible}) 5... Rg8+ 6. Kd7 $1 $18) 5. Qb3+ Ka1 6. Qa3+ Kb1 7. Qb4+ Ka1 (7... Ka2) 8. Qa5+ Kb1 9. Qb6+ Ka1 (9... Ka2) 10. Qa7+ Kb1 $11 (10... Kb2)) 1... Rxh7 {Surprisingly, it is better for white to leave a rook behind one of the dangerous pawns than to have it on g7 as in the thematic try.} 2. f8=Q f2 $1 (2... h2 3. Qg8+ $18) 3. Qxf2 (3. Qg8+ $2 Ka1 $1 4. Qxh7 f1=Q $11) (3. c4 $2 Rh8 $1 4. Qxh8 f1=Q $11) 3... h2 {Unfortunately for white, the queen cannot reach h1 in one move.} 4. c4+ $1 Kb3 5. Qf3+ Kb4 $1 (5... Kxc4 6. Qe4+ $18) 6. Qh1 Kc5 $1 {Now the white king is stuck on the eight rank. The plan that looks logical is starting to move the white king towards the rook. But it doesn't work yet! While the black king is on c5 the rook can leave the seventh rank (e.g. by moving to h5).} 7. Qd5+ Kb4 8. Qd2+ Kc5 9. Qf2+ Kb4 10. Qb2+ Kc5 11. Qb5+ Kd4 12. Qd5+ Kc3 13. Qh1 Kd4 {The black king is not on c5 so the white king can make a move towards the rook!} 14. Kb8 $1 {The 1st step.} Kc5 {Back to c5... White needs to repeat this 8-move-long manoeuvre to gain a tempo for another king move.} 15. Qd5+ Kb4 16. Qd2+ Kc5 17. Qf2+ Kb4 18. Qb2+ Kc5 19. Qb5+ Kd4 20. Qd5+ Kc3 21. Qh1 Kd4 22. Kc8 $1 {The 2nd step.} Kc5 23. Qd5+ Kb4 24. Qd2+ Kc5 25. Qf2+ Kb4 26. Qb2+ Kc5 27. Qb5+ Kd4 28. Qd5+ Kc3 29. Qh1 Kd4 30. Kd8 $1 {The 3rd step.} Kc5 31. Qd5+ Kb4 32. Qd2+ Kc5 33. Qf2+ Kb4 34. Qb2+ Kc5 35. Qb5+ Kd4 36. Qd5+ Kc3 37. Qh1 Kd4 38. Ke8 $1 {The 4th step.} Kc5 39. Qd5+ Kb4 40. Qd2+ Kc5 41. Qf2+ Kb4 42. Qb2+ Kc5 43. Qb5+ Kd4 44. Qd5+ Kc3 45. Qh1 Kd4 46. Kf8 $1 {The 5th step.} Kc5 47. Qd5+ $1 ({ It is too early to attack the rook:} 47. Kg8 $2 Rh5 $1 48. Kg7 Kb6 $1 $11) 47... Kb4 48. Qd2+ Kc5 49. Qf2+ Kb4 50. Qb2+ Kc5 51. Qb5+ Kd4 52. Qd5+ Kc3 53. Qh1 Kd4 54. Kg8 $1 {The last step along the 8th rank. The white king will finally escape from the eight rank. White has a winning position. The last move was exactly the 50th one since the last capture or pawn push (4.c4+) so, according to the FIDE rules, this position would be a draw! Fortunately, endgame study composition codex doesn't care about that artificial "draw by 50 moves" rule!} 1-0