[Event "?"]
[Site "?"]
[Date "2023.12.02"]
[Round "?"]
[White "a4 Critical position"]
[Black "a4 / Ra6-Ra2 /Kg1-Kg8"]
[Result "*"]
[Annotator "V. Poghosyan"]
[SetUp "1"]
[FEN "6k1/6p1/R4p2/4p2p/P3P2P/5P2/r5P1/6K1 w - - 0 1"]
[PlyCount "21"]
[EventDate "2023.12.02"]

{[%evp 0,21,177,177,183,177,177,186,186,186,186,177,252,252,241,252,245,252,362,362,362,362,362,362]} {[#]} 1. Ra7 (1. a5 Ra1+ (1... Kh7 2. Ra7 $18 {Transposition} (2. Kf1 $2 Ra1+ $1 (2... Kh6 3. Ra8 $1 g5 4. hxg5+ Kxg5 (4... fxg5 5. a6 $1 Kg7 6. a7 $18 {Transposition}) 5. Kg1 $1 (5. a6 $2 Kf4 $1 6. a7 Ke3 7. Kg1 Ra1+ 8. Kh2 Kf2 9. Rf8 Rxa7 $1 10. Rxf6 Rg7 $1 $11) 5... Kf4 6. Kh2 $18) 3. Kf2 Ra2+ $1 4. Kg3 Ra3 $1 5. Ra7 Kh6 $1 6. a6 g5 $1 $11 {Transposition})) 2. Kf2 $1 (2. Kh2 $2 Kh7 {Transposition} 3. Ra8 $11 {Transposition}) 2... Kh7 (2... Ra2+ 3. Kg3 Kh7 4. Ra7 $1 {Transposition} Kh6 5. a6 $18 {Transposition} (5. Ra8 {Transposition} g5 (5... g6 {Carlsen-So 2021 (rev. col.) after 10...g6}) 6. a6 $1 $18 {Transposition})) (2... Kf7 3. Ra7+ Kg6 4. a6 Kh6 5. Ra8 g5 6. a7 (6. hxg5+ fxg5 7. Ke3 $18 (7. a7 Kg7 $18 {Transposition})) 6... Kg7 7. hxg5 fxg5 8. Ke3 $18) 3. Ra7 $1 $18 {Transposition}) (1. Ra8+ $2 $11 Kh7 (1... Kf7 $2 2. a5 $18 (2. Ra7+ Kg6 3. a5 $18 {Carlsen-So rev. col. 6.Ra7+!}) 2... Ra1+ 3. Kf2 $1 Ra2+ (3... Kg6 4. a6 Ra2+ 5. Kg3 Kh6 6. Kh2 Ra1 7. a7 Kh7 8. g4 g6 9. gxh5 gxh5 10. Rf8 $1 Rxa7 11. Rxf6 $1 $18) 4. Kg3 g6 5. a6 f5 6. a7 Kg7 7. Kh2 $1 Ra1 8. g3 $18) 2. a5 g5 $11 (2... Ra1+ 3. Kh2 {Transposition} (3. Kf2 Ra2+ (3... g5 4. Kg3 $11 {Transposition} (4. hxg5 fxg5 5. a6 $11 {Transposition})) 4. Kg3 g6 $1 (4... g5 $2 5. a6 $1 Ra3 6. Kh2 $18 {Transposition}) 5. a6 f5 $1 6. a7 (6. Kh2 Ra1 $1 $11) 6... f4+ $1 7. Kh2 Ra1 $1 $11 {Transposition}) 3... g5 {Transposition} (3... Kh6 $2 {Transposition} 4. a6 (4. Kg3 g5 5. a6 $1 {Transposition} Ra2 6. a7 Kg7 $18 {Transposition}) 4... g5 (4... g6 5. g4 Ra2+ 6. Kg1 Ra3 7. Kf2 Kh7 $18) (4... Ra3 5. Kg1 g5 6. a7 Kg7 7. hxg5 fxg5 8. Kf2 $18 {Transposition}) 5. a7 (5. Kg3 $18 {Transposition}) (5. g4 hxg4 6. a7 $1 Kh7 $18 {Transposition} (6... Kg7 $18 {Transposition})) 5... Kh7 {Transposition} (5... Kg7 $18 {Transposition})) (3... g6 4. a6 (4. Kg3 f5 5. a6 Ra3 6. Kf2 Ra2+ $1 7. Kg1 Ra1+ $1 8. Kh2 f4 $11 (8... Kg7 $11)) 4... f5 $1 5. a7 f4 $1 {Transposition} 6. g3 fxg3+ 7. Kg2 (7. Kxg3 Ra2 8. Kh3 Kg7 $11) 7... Ra2+ 8. Kxg3 Kg7 9. Re8 Rxa7 10. Rxe5 Ra1 $11) 4. hxg5 (4. Kg3 {Transposition} Ra3 $11 (4... Kg7 5. a6 Ra3 $1 $11 {Transposition}) 5. a6 g4 6. a7 gxf3 7. gxf3 Kg7 $1 $11) (4. a6 gxh4 5. a7 Kg7 $1 $11 {Transposition}) 4... fxg5 $1 5. a6 (5. Kg3 Ra2 6. a6 $11 {Transposition}) 5... Kg7 {Transposition} 6. a7 {Transposition} (6. Kg3 Ra2 {Transposition} (6... Kh7 7. a7 $11 {Transposition}) 7. Kh2 Ra1 $11 {Transposition}) (6. g4 Ra2+ 7. Kh3 h4 $1 8. a7 Kh7 9. Re8 Rxa7 10. Rxe5 Kg6 $11) (6. g3 Kh7 7. Kg2 Kg7 8. Kf2 Ra2+ 9. Ke3 Ra3+ 10. Ke2 Ra2+ 11. Kd3 h4 12. gxh4 gxh4 13. Re8 Rxa6 14. Rxe5 h3 $11) 6... Kh7 $1 7. Kg3 {Transposition} Ra2 $1 8. Kh2 Ra1 $1 $11 {Transposition} 9. g3 Ra2+ 10. Kg1 Ra1+ 11. Kf2 Ra2+ 12. Ke3 Ra3+ 13. Ke2 Ra2+ 14. Kd3 h4 15. gxh4 gxh4 $11) (2... g6 $2 {Immediately 2...g6? without 2...Ra1+ loses, because without the check from a1 White manages to go to the queenside after 4...f4 5.Kf1!} 3. a6 $1 f5 4. a7 f4 5. Kf1 $1 $18) 3. hxg5 (3. Kh2 Ra1 $11 {Transposition} (3... gxh4 $2 4. Kh3 Kg7 5. a6 $1 (5. Kxh4 $2 Rxg2 $1 6. Kxh5 Rh2+ 7. Kg4 Rg2+ 8. Kh3 Ra2 $11) 5... Kh7 6. a7 (6. Kxh4 $18) 6... Ra1 7. Kxh4 $1 Rh1+ 8. Kg3 Ra1 9. Rf8 Rxa7 10. Rxf6 $1 $18)) 3... fxg5 4. a6 Ra1+ $1 5. Kf2 {Transposition} Ra2+ $1 6. Kg3 {Transposition} Kg7 $11 {Transposition}) (1. Kh2 $2 Kh7 2. a5 Ra1 $1 $11 {Transposition} (2... Kh6 $2 3. Ra8 $1 Ra1 $18 {Transposition})) 1... Kh7 (1... Ra1+ 2. Kf2 $1 (2. Kh2 $2 Kh7 $1 3. a5 Kh6 $1 4. a6 $11 {Transposition}) 2... Kh7 3. a5 $18 {Transposition}) 2. a5 $1 {Transposition} Kh6 (2... Ra1+ 3. Kf2 {Transposition} Kh6 (3... Ra2+ 4. Kg3 $18 {Transposition}) 4. a6 $18 {Transposition} (4. Ra8 {Transposition} g5 (4... Ra2+ 5. Kg3 $18 {Transposition}) 5. hxg5+ Kxg5 6. a6 $18 {Transposition})) 3. a6 (3. Ra8 g5 (3... Ra1+ 4. Kf2 $1 $18 {Transposition} (4. Kh2 $2 g5 $1 5. a6 gxh4 6. a7 Kg7 $1 $11 {Transposition})) 4. hxg5+ $1 Kxg5 (4... fxg5 5. a6 $1 $18 {Transposition}) 5. a6 $18 {Transposition}) 3... Ra1+ (3... g5 4. hxg5+ $1 fxg5 (4... Kxg5 5. Ra8 $18 {Transposition}) 5. Ra8 $1 {Transposition} Kg7 {Transposition} (5... Kh7 6. a7 $1 {Transposition} Kg7 7. Kf1 $1 {Transposition} h4 8. Ke1 $18) (5... g4 6. fxg4 hxg4 7. a7 Kg7 8. g3 $18) (5... Ra1+ 6. Kf2 $1 {Transposition} (6. Kh2 $2 $11 {Transposition})) 6. a7 $1 (6. Ra7+ $6 Kg6 7. Ra8 $1 Kg7 $18 {Transposition}) (6. Kf1 $2 Ra1+ $1 7. Ke2 Ra2+ $1 8. Kd3 Rxg2 $1 9. Re8 Ra2 $1 10. Rxe5 Kf6 $11) 6... Ra1+ 7. Kf2 $1 {Transposition} (7. Kh2 $2 $11 {Transposition}) 7... Ra2+ {Transposition} 8. Ke3 $18) (3... g6 4. Ra8 f5 (4... Ra1+ 5. Kf2 Ra2+ 6. Ke3 Ra1 7. a7 Kg7 8. Kd3 Ra3+ 9. Kc4 Ra5 10. Kb4 Ra1 11. Kc5 $18) 5. a7 Kg7 6. Kf1 $18) 4. Kf2 $1 {Transposition} (4. Kh2 $2 {Transposition} g5 $1 5. Kg3 (5. hxg5+ fxg5 $1 6. Ra8 {Transposition} Kg7 $11 {Transposition} (6... Kh7 $11) (6... Kg6 $11)) (5. g3 Ra2+ 6. Kg1 Ra1+ 7. Kf2 Ra2+ 8. Ke3 Ra3+ $1 9. Ke2 Kg6 $1 (9... gxh4 $2 10. gxh4 $1 Kg6 11. Ra8 Kg7 12. Kd2 Rxf3 13. Kc2 Re3 (13... Ra3 14. Kb2 Ra5 15. Kc3 Ra4 16. Kb3 Ra5 17. Kb4 Ra1 18. Kb5 Rb1+ 19. Kc6 Ra1 20. Kb7 Rb1+ 21. Ka7 Rb4 22. Rc8 Rxe4 23. Kb6 Rxh4 24. a7 Ra4 25. a8=Q Rxa8 26. Rxa8 $18) 14. Rb8 Ra3 15. Rb7+ Kg6 16. Rb6 $1 Kg7 17. Kb2 Ra5 18. Kc3 Ra1 19. Kc4 f5 20. exf5 Ra5 21. Kb4 Ra1 22. Kc5 e4 23. Kd4 Ra4+ 24. Ke3 Kh7 25. Rg6 $18) 10. Ra8 Kg7 11. Kd2 Rxf3 $1 12. Rb8 Ra3 $1 13. Rb7+ Kg6 14. a7 f5 $11) 5... Ra3 $1 {Transposition} 6. Ra8 Kg7 $1 $11 {Transposition}) 4... Ra2+ {Transposition} (4... g5 5. hxg5+ $1 Kxg5 (5... fxg5 6. Ra8 $1 {Transposition} h4 (6... Kg7 7. a7 $18 {Transposition}) (6... Ra2+ 7. Ke3 $18 {Transposition}) 7. a7 Kg7 8. Ke2 $18) 6. Ra8 {Transposition} Ra2+ {Transposition} 7. Kg1 {Transposition} (7. Ke3 $6 Ra3+ 8. Kf2 $1 Ra2+ $18 {Transposition}) (7. Kg3 h4+ 8. Kh3 Ra1 9. Kh2 $1 Kf4 10. Rg8 Rxa6 11. Kh3 $1 (11. Rg4+ $2 Ke3 12. Kh3 Ra8 $1 13. Kxh4 Rh8+ 14. Kg3 Ke2 $1 15. Rg6 Kf1 16. Rxf6 Rg8+ $1 17. Kh3 Rxg2 18. f4 Rg8 $11)) 7... Kf4 8. a7 Ke3 9. Rf8 Rxa7 10. Rxf6 $18) (4... Kh7 5. g3 (5. Ra8 Ra2+ 6. Kg3 g6 7. Kh2 $1 Ra1 8. g4 Kg7 9. Kg2 Ra2+ 10. Kf1 Ra1+ 11. Ke2 Ra2+ 12. Kd3 Ra3+ 13. Kc4 Rxf3 14. gxh5 gxh5 15. Rd8 Ra3 16. Rd7+ Kg6 17. a7 $18) 5... Ra2+ 6. Ke3 Ra3+ 7. Ke2 Ra2+ 8. Kd3 Ra3+ 9. Kc4 Rxf3 10. Rd7 Rxg3 11. Rd3 Rg1 (11... Rg4 12. a7 Rxe4+ 13. Kb5 $18) 12. Ra3 Rc1+ 13. Kb5 Rc8 14. a7 Ra8 15. Kb6 g5 16. Kb7 Rxa7+ 17. Rxa7 $18) 5. Kg3 $1 {Transposition} g5 (5... g6 6. Ra8 $18 {see Carlsen-So 2021 (rev. col.), line 11.a6.}) (5... Ra3 6. Ra8 (6. Kh2 g6 (6... g5 7. Ra8 $1 Kg7 (7... gxh4 8. a7 Kg7 9. Kh3 $1 Ra1 $18 {Transposition}) 8. a7 Ra1 $18 {Transposition}) 7. Ra8 f5 8. a7 Kg7 9. f4 (9. Kg1 $18) (9. g3 $18) 9... fxe4 (9... exf4 10. e5 $1 $18) 10. fxe5 $1 e3 11. Kg3 $1 $18) (6. Kf2 $6 Ra2+ $18 {Transposition}) 6... g5 7. a7 (7. hxg5+ fxg5 8. a7 (8. Kf2 Ra2+ 9. Ke3 $18 {Transposition} Ra3+ 10. Kd2 Ra2+ 11. Kc3 Kg7 12. a7 $18) 8... Kg7 $18 {Transposition}) 7... Kg7 $18 {Transposition}) 6. Ra8 $1 {Transposition} (6. hxg5+ $2 fxg5 $1 7. Kh2 Kg6 8. Ra8 Kg7 9. Kg1 Ra1+ $1 10. Kf2 Ra2+ $1 11. Kg3 Kh7 {Transposition} 12. a7 Kg7 $1 $11 {Transposition}) 6... Kh7 (6... Kg7 {Transposition} 7. a7 $1 (7. Ra7+ $6 Kg6 8. Ra8 $1 Kg7 {Transposition} 9. a7 $1 $18) (7. Kh2 $2 Ra1 $1 8. g3 Ra2+ 9. Kg1 Ra1+ 10. Kf2 Ra2+ 11. Ke3 Ra3+ $1 12. Ke2 Kh7 $1 13. a7 Kg7 (13... gxh4 14. gxh4 Kg7 15. Kd2 Ra1 $11) 14. Kd2 Ra1 $11) 7... Ra1 (7... Kh7 8. Rf8 (8. Kh2 {Transposition} Ra1 {Transposition} 9. g4 (9. Rf8 Rxa7 {Transposition} 10. Rxf6 $1 gxh4 11. Rf5 $18) 9... hxg4 {Transposition} 10. hxg5 $1 gxf3 11. g6+ $1 Kg7 12. Kg3 $1 $18) 8... Rxa7 9. Rxf6 $18) (7... Ra3 {Transposition} 8. hxg5 fxg5 {Transposition} 9. Kf2 $1 {Transposition} Ra2+ $18 {Transposition}) 8. hxg5 $1 fxg5 9. Kf2 $1 $18 {Transposition}) (6... Kg6 7. a7 (7. Kh2 Kg7 $18 {Transposition} (7... Ra1 8. a7 Kg7 $18 {Transposition})) 7... Kg7 $18 {Transposition}) (6... gxh4+ 7. Kxh4 $18) 7. a7 (7. Kh2 Kg7 {Transposition} (7... Ra1 {Transposition} 8. a7 (8. g4 hxg4 9. hxg5 $1 gxf3 10. Kg3 $1 fxg5 11. Kxf3 $1 Rg1 12. Kf2 $1 Ra1 13. Kg3 Rg1+ 14. Kh3 $1 $18) 8... gxh4 {Transposition} (8... Kg7 $18 {Transposition}) 9. Rf8 $1 Rxa7 10. Rxf6 $1 $18) (7... gxh4 8. Kh3 (8. a7 Kg7 $18 {Transposition} (8... Ra1 $18 {Transposition})) 8... Ra1 9. Kxh4 Rh1+ 10. Kg3 $18) 8. a7 $18 {Transposition} (8. Kg1 Ra1+ 9. Kh2 $1 (9. Kf2 $2 gxh4 $1 10. a7 Ra2+ 11. Ke3 Ra3+ 12. Kd2 Ra1 $11) 9... Ra2 $18 {Transposition})) (7. Kh3 Ra3 8. Kh2 $1 {Transposition} Ra2 (8... gxh4 9. Kh3 $18) (8... Ra1 $18 {Transposition}) 9. a7 $18 {Transposition}) (7. hxg5 $2 fxg5 $1 $11 {Transposition}) 7... Kg7 {Transposition} 8. Kh2 $1 {Transposition} (8. Kh3 $6 Ra1 9. Kg3 $1 {Transposition} Ra2 $18 {Transposition}) (8. hxg5 $2 fxg5 $11 {Transposition}) 8... Ra1 {Transposition} (8... gxh4 {Transposition} 9. Kh3 $1 Ra1 {Transposition} 10. Kxh4 Rh1+ 11. Kg3 Ra1 12. Kh2 Kh7 (12... Ra2 13. Kh3 Ra1 14. g4 hxg4+ 15. fxg4 $1 $18 (15. Kxg4 $2 Ra2 $11)) 13. g4 (13. g3 Kg7 14. f4 (14. g4 h4 15. Kg2 Ra3 16. Kh3 Rxf3+ 17. Kxh4 $1 Ra3 18. g5 $1 $18) 14... Kh7 15. Kh3 Rh1+ 16. Kg2 Ra1 17. fxe5 fxe5 18. Kf3 $18) 13... h4 14. Rf8 Rxa7 15. Rxf6 $1 $18) (8... Ra3 9. hxg5 (9. g4 hxg4 10. hxg5 $1 fxg5 11. fxg4 $1 $18) 9... fxg5 10. Kg1 $1 $18) (8... Kh7 9. hxg5 (9. Rf8 Rxa7 $18 {Transposition}) 9... fxg5 10. Kg1 $1 $18 {Transposition}) 9. g4 $1 (9. Kg3 $6 {Transposition} Ra2 {Transposition} 10. Kh2 $1 $18 {Transposition}) 9... hxg4 {Transposition} (9... gxh4 10. gxh5 $1 Ra3 11. Kh3 $18) (9... Ra2+ 10. Kg3 $1 hxg4 11. hxg5 $1 fxg5 12. Kxg4 $1 $18) 10. hxg5 $1 fxg5 (10... gxf3 11. gxf6+ $1 $18) 11. fxg4 $1 $18 *

