1.Nd4+ from battery Kb4 (1...Ka5 2.Nxe6 Re7 3.Bb3! =, 1...Ka3 2.Bf3! Rh7+ 3.Kg2 e5 4.Nc6 Bxc6 5.Bxc6 Kb4 6.Kf3 = EGTB) 2.Nxe6 (2.Bg4? e5 -+, 2.Bf3?  Rb6! -+ ) 2...Re7 (2...Bxb5 {or Kxb5 or Rxb5} 3.Kg2 = EGTB) 3.Bg4 (3.Ng5 Re1+ 4.Kg2 Rxd1 -+) 3...Bd7 (3...Bxb5 4.Kh2 = EGTB) 4.Nf4! (4.Nc7? Re1+ 5.Kg2 Bxg4 -+, 4.Nd4? Rh7+!  5.Kg2 Bxg4 -+) 4...Rh7+ (4...Re1+ 5.Kg2 Bxg4 6.Nd3+ Kxb5 7.Nxe1 =, 4...Bxg4 5. Nd5+ Kxb5 6. Nxe7 =) 5.Bh5
A} 5...Bg4  6.Nd5+ Kxb5 7.Nf6 Bf3+ 8.Kg1 Rg7+ 9.Kf2! (9. Kf1? Bxh5 10.Nxh5 Rg5 11.Nf4 Rf5 -+) 9...Bxh5 10.Nxh5 draw,
B} 5...Be8 switchback 6.Nd5+ Kxb5 7. Nf6!  (7.Nc7+?  Kc6!  8.Nxe8 Rxh5+ 9. Kg2 Rf5! -+) 7...Bc6+ 8. Kg1! (8. Kh2? Rh6 -+) 8...Rh6 9. Be2+ draw EGTB
Correction of study - M. Hlinka, Shach. Obozr.64, 1990, comm.