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Georgia In Memory of Generation

Studies Awarded for in the 5th theme:

Section 5) Akobia, Checkmate studies:

[Event "1.p In Memory of Generation 5) Akobia"] [Date "2021"] [White "Martin Minski and Jan Sprenger"] [Black ""] [Result "1-0"] [FEN "8/Qp2PK2/8/3P2B1/6k1/7p/7p/3q4 w - - 0 1"] 
 1. Kg6 $1 (1. e8=Q $2 Qxd5+ 2. Kf8 Qf5+ 3. Kg7 Qxg5+ 4. Qg6 Qxg6+ 5. Kxg6 h1=Q $11) (1. Qe3 $2 Qxd5+ 2. Kg7 Qxg5+ 3. Qxg5+ Kxg5 4. e8=Q h1=Q $11) 1... h1=Q ( 1... Qd3+ 2. Kh6 h1=Q 3. e8=Q $18) 2. e8=Q Qhxd5 3. Qc8+ Kg3 {position X} (3... Qd7 4. Qc4+ $18) 4. Bh4+ $1 ({logical try:} 4. Qe3+ $2 Q5f3 $1 5. Qg4+ $4 Kxg4 {no mate possible because of the wB}) ({thematic try:} 4. Bf4+ $2 Kg2 $1 $11 ( 4... Kxf4 $2 5. Qf2+ Ke4 6. Qe8+ Kd3 7. Qee3+ Kc4 8. Qa2+ Kb5 9. Qb2+ Kc4 10. Qec3# {mate with self-block on d5})) 4... Kh2 (4... Kg2 5. Qf2+ Kh1 6. Qxh3#) ( 4... Kxh4 5. Qf2#) 5. Bg3+ $1 (5. Qf2+ $2 Qg2+ $11 {cross check}) 5... Kxg3 { position X without the wB} 6. Qe3+ {main A:} Q5f3 ({main B:} 6... Q1f3 7. Qc7+ Kg4 (7... Kg2 8. Qc2+ Kg3 9. Qcf2+ Kg4 10. Qfxf3+ Qxf3 11. Qg5# { with thematic mate}) 8. Qc4+ $3 {echo queen sacrifice} Qxc4 (8... Kg3 9. Qe1+ Kh2 10. Qc7+ Kg2 11. Qc2+ $18) 9. Qg5# {mate with block on f3}) (6... Kg2 7. Qcxh3#) 7. Qg4+ $3 {the point} Kxg4 8. Qg5# {mate with block on f3} 1-0

[Event "2.p In Memory of Generation 5) Akobia"] [Date "2021"] [White "Amatzia Avni and Sergei Osintsev"] [Black ""] [Result "1-0"] [FEN "6QR/qP6/4p3/2r4B/4p1Np/7k/4pK1P/8 w - - 0 1"] 
 1. Qxe6 $1 {white ignores black's battery against the wK and creates his own battery vs. bK} (1. Qa8 $6 Rc1+ $1 (1... Rf5+ 2. Kxe2 Qg1 3. Rd8 $1 Rf3 4. b8=Q Qg2+ 5. Nf2+ Qxf2+ 6. Kd1 $18) 2. Kxe2 Rc2+ 3. Kf1 Rc1+ 4. Ke2 Rc2+ 5. Kd1 Qc5 $1 6. Qa1 (6. Rc8 Rc1+ 7. Kd2 Rc2+ 8. Kd1 Rc1+ $11 {perpetual check}) (6. Qa4 Rc1+ 7. Ke2 Rc2+ 8. Kf1 Rc1+ 9. Ke2 Rc2+ $11 {perpetual check}) 6... Rg2 $1 7. Nf2+ $1 Rxf2 8. Be2 Qd5+ 9. Ke1 Rxe2+ 10. Kxe2 Qd3+ $11) 1... e1=Q+ $1 (1... Rc6+ 2. Ne3+ Rxe6 3. Bg4+ Kxh2 4. Rxh4#) (1... Rf5+ 2. Kxe2 $18) 2. Kxe1 Qa5+ ( 2... Qa1+ 3. Kf2 Qb2+ 4. Ke3 Qc3+ 5. Kxe4 Qb4+ 6. Kf3 Qxb7+ (6... Rc3+ 7. Ne3+ $18) 7. Ke3 $1 Rc3+ 8. Kf4 $1 Rf3+ 9. Kg5 $1 $18) 3. Ke2 (3. Kd1 $2 Rd5+ 4. Qxd5 Qxd5+ 5. Ke1 $11) 3... Qb5+ (3... Rc2+ 4. Ke3 Qd2+ 5. Kxe4 $18) 4. Kf2 Rf5+ (4... Qb2+ 5. Ke3 Qc3+ 6. Kxe4 Rc4+ 7. Kf5 $18) 5. Qxf5 Qxf5+ 6. Kg1 (6. Ke1 $2 Qa5+ $1 $11) 6... e3 {[#]} (6... Qc5+ 7. Nf2+ $18) 7. Nxe3 $1 (7. b8=Q $2 Qf2+ $3 ({but not} 7... Qf3 $2 8. Qg3+ $3 hxg3 9. Be8+ $18) 8. Nxf2+ exf2+ 9. Kf1 $11) 7... Qxh5 $1 (7... Qb1+ 8. Bd1 $1 (8. Nd1 $2 Qxd1+ $1 9. Bxd1 $11) 8... Qxb7 9. Bg4#) 8. b8=Q (8. Rxh5 $2 $11) 8... Qxh8 $1 (8... Qg5+ 9. Qg3+ $3 ({but not} 9. Ng4 $6 Qc1+ $1 10. Kf2 Qd2+ $1 11. Kf1 Qd1+ 12. Kf2 Qd2+ 13. Kf3 Qd3+ 14. Kf4 Qd4+ 15. Kf5 Qxg4+ 16. Kf6 Qf3+ $11 {perpetual check}) (9. Kh1 $2 Qg1+ 10. Kxg1 $11) 9... Qxg3+ 10. hxg3 $18) 9. Qb3 $1 {[#] The final, decisive battery} (9. Qxh8 $2 $11) 9... Qg8+ $1 (9... Qg7+ 10. Ng2+ $1 $18 ({but not}  10. Ng4+ $2 Kxg4 $11)) 10. Ng4+ $1 Qxb3 11. Nf2# {Themes: batteries, stalemate, anti-stalemate, perpetual check, change (Qg7+ / Qg8+ - Ng2+ / Ng4+), mat} 1-0