[White "Korolkov Mitrofanov Study"]   [Black "White to play and draw"]   [FEN "1k6/2p5/K1p1P1P1/2p2P2/P1P1pQ2/4p3/3qp3/5n2 w - - 0 1"]   1 Qe5!    ({First of all, White has to parry the threat of Qd7/Qc8. One of the commentators on the social networks suggested}  1 Qh6  {but then}  1 ... Qd8  {followed by}  2... Qc8 { and}  3... e1Q  {wins.})   ({Also,}  1 e7 Qd7  {leads to the same checkmate:})   {Therefore, the only move for White in this position}   {The point is that now  1... Qd8  is met by  2 Qb2  and suddenly White mates Black.   Furthermore, White threatens the simple  Qh8  with mate. Therefore, Black has to play the only move:}   1... Qa5+!!   {The first queen sacrifice.}   2 Kxa5 Kb7!   {The point. Black is now the one threatening  3... e1Q mate.   It is now White's turn to sacrifice the queen:}   3 Qb2+ Ka7 4 Qb8+!   {The second queen sacrifice}   4... Kxb8 5 Ka6   {The whole battle revolves around the king positioning.}   5... e1Q    {Now comes the only branching of the variations. }   6 g7   (6 e7??   {This actually loses. The difference will be apparent after we examine the line with the g - pawn push.}   6... Qa5+ 7 Kxa5  Kb7 8 e8Q e2   {White is forced to give up his queen again:}   9 Qb8+ Kxb8 10 g7 e1Q+ 11 Ka6 Qg3   {We see that in this variation Black's queen managed to catch the g-pawn.})   6 ... Qa5+! { A forced third queen sacrifice}  7 Kxa5 Kb7   8 g8Q e2 9 Qa8+ { fourth if you are counting}  Kxa8 10 Ka6 e1Q 11 e7   {We can see the point of the study now. Black's e pawn is blocking the queen, and Black is forced to sacrifice once again in order to save himself from the mate:}   11... Qa5+!  {fifth sacrifice so far}  12 Kxa5 Kb7 13 e8Q   {It seems that White is simply a queen up, but now another hero enters the scene:}   13... Nd2!   {Amazingly, White has no defence against the dual threat of  Nxc4  or  Nb3  mate.}   {Therefore, here we go once again:}   14 Qa8+!{ sixth, but not the last one}  14...Kxa8    15 Ka6{ else Kb7 renews the mating threat} 15... Nxc4 16 f6 Ne5 17 f7    {The climax of the study is near. It seems that Black simply draws with   17... Nxf7 18 a5,  but I promised seven queen sacrifices. And Black can try to be tricky for the end}   17... Nd7!?   {Hoping for  18 a5 Nb8 mate . But having come this far, it would be really stupid from White to throw all his previous work away}   18 f8Q  {the seventh queen sacrifice. Okay, technically it is hard to call this a sacrifice, but since I promised seven sacrifices, I am forced to cheat slightly in order to fullfill it}   18...Nxf8 19 a5 e3 { stalemate   Finally we have arrived at the end of this study. The artistic value of this study can't be overestimated. I am not sure whether I am  more impressed  by the  flashy queen sacrifices , or by the blockading role of the double  tripled black pawns.}