[Event "Olympic ty Sochy"] [Site "?"] [Date "2014.??.??"] [Round "?"] [White "Didukh, S."] [Black "(Pieces in all corners 1)"] [Result "1/2-1/2"] [Annotator "6th Prize"] [SetUp "1"] [FEN "n6k/6p1/8/6PK/8/1b6/7p/NQ1n4 w - - 0 1"] [PlyCount "18"] [EventDate "2014.??.??"] 1. Qe4 Nf2 2. Qh4 $1 (2. Qxa8+ $2 Bg8 3. g6 h1=Q+ 4. Qxh1 Nxh1 $19) (2. Qb7 $2 Bf7+ $1 $19 (2... Bg8 $2 3. Kg6 Bh7+ 4. Kf7 $19) 3. g6 Bg8 (3... Be8) 4. Qxa8 h1=Q+ 5. Qxh1 Nxh1 $19) 2... h1=Q 3. Qxh1 Bf7+ $1 (3... Bd1+ 4. Qxd1 $11) 4. g6 Bxg6+ 5. Kg5+ $3 {6th WCCT Theme} ({Thematic try:} 5. Kxg6+ $2 Nxh1 $19 { mutual zugzwang}) 5... Nxh1 6. Kxg6 {[%csl Ga1,Ga8,Gh1,Gh8] mutual zugzwang with pieces on all corner squares} Nc7 (6... Ng3 7. Nc2 $1 (7. Nb3 $2 Ne2 $1 8. Nc5 Nc7 $19) 7... Nc7 8. Nd4 {see the main line}) 7. Nb3 $1 (7. Nc2 $2 Nb5 $1 8. Ne3 Ng3 9. Nd5 Ne2 $1 10. Kg5 Nd6 11. Nf6 $1 Nf4 $1 12. Kxf4 gxf6 $19) 7... Ng3 (7... Ne6 8. Kf5 $11) 8. Nd4 Kg8 9. Ne6 $1 Nxe6 {stalemate} 1/2-1/2