
Black to play
The solution is: 23…Na4+! 24.Ka3 [24.bxa4 Rb6+ 25.Ka3 Bc6-+] 24…Qc1+ 25.Bb2 [25.Kxa4 Bc6+ 26.Ka5 Qa3#] 25…Nxb2 0-1
Black to play
The solution is: 23…Na4+! 24.Ka3 [24.bxa4 Rb6+ 25.Ka3 Bc6-+] 24…Qc1+ 25.Bb2 [25.Kxa4 Bc6+ 26.Ka5 Qa3#] 25…Nxb2 0-1