[Event "USSR Ch. 1933"]  [Site "White to play and win"]  [Date "2017.04.12"]  [Round "?"]  [White "Botvinnik"]  [Black "Yudasin"]  [Result "1-0"]  [SetUp "1"]  [FEN "r1b2r2/1p1n2bk/1np1p1pp/p7/3PN3/qP2BN2/2Q1BPPP/2RR2K1 w - - 0 1"]  [PlyCount "11"]   1. Nh4 {[pgndiagram] The primitive threat of Nxg6 is too strong here} (1. Neg5+  {Was mentioned by some people} hxg5 2. Nxg5+ Kg8 3. Qxg6 Nf6 {And here White  has the compensation, but not more}) 1... Qe7 (1... Rf5 {Is actually the best  defence, forcing White to find a series of brilliant moves in order to win} 2.  g4 Rd5 {And now there is no Bh5 in the position} 3. g5 {The most precise way  to win; blocking the rook's action along the 5th rank} (3. Nxg6 Kxg6 {And no  discovered check is deadly}) 3... Qe7 {[pgndiagram] And now White can finally  execute the combination as in the game. This is the best proof of advance of  chess defence since 1933.} 4. Nxg6 Kxg6 5. Bh5+ {And White can execute the  same combination as in the game}) 2. Nxg6 $1 {A strong sacrifice} Kxg6 3. Bh5+  $3 {[pgndiagram] One wants to give the discovered check automatically, but  this is much stronger, forcing the mate} Kxh5 (3... Kh7 4. Ng5+ Kg8 5. Qh7#) 4.  Ng3+ Kg4 5. Qe4+ Rf4 6. Qxf4# 1-0