[Event "?"]  [Site "?"]  [Date "2017.07.13"]  [Round "?"]  [White "Tactics #67"]  [Black "   NN-NN, Unknown   "]  [Result "*"]  [SetUp "1"]  [FEN "r2q1rk1/2p2ppp/3p1B2/1pbNp3/3nP1b1/1B1P1N2/1PP1QPPP/R3K2R w KQ - 0 1"]  [PlyCount "5"]   1. Rb1 $3 {[pgndiagram] One of the most amazing moves I have ever seen. White  solves the problem of the a-file simply by moving his rook away from the attack.  He puts the ball into Black's court}   (1. Rd1 {Would leave the rook prone to  the bishop attack} Bxf3 2. Qe3 gxf6 3. Qh6 Bxd1 {[pgndiagram] And here again  Black is slightly better after} 4. Nxf6+ Qxf6 5. Qxf6 Bh5)   (1. Rc1 {Would  leave the rook prone to the future Knight attack} Nxe2 2. Bxd8 Nxc1 {  [pgndiagram] And white is lost})   (1. Rxa8 Qxa8 2. Qd1 {Is also possible, as  after} Bxf3 3. gxf3 gxf6 4. Qc1 {[pgndiagram] White probably has a winning  attack. It is a pity that this pragmatic solution also works because the  beauty of the 1 Rb1 is slightly diminished}) 1... gxf6   (1... Bxf3 {Now doesn't  help} 2. Qe3 gxf6 3. Qh6 {And wins})   (1... Nxe2 2. Bxd8 {Also wins}) 2. Nxd4 $1  {[pgndiagram] The point} Bxe2   (2... Bb4+ {Is more tricky defence} 3. c3 Bxc3+  4. bxc3 Bxe2 5. Nc6 Bxd3 6. Rd1 Bxe4 7. Nxd8 Bxd5 8. Bxd5 Raxd8 {[pgndiagram]  And here White still has some technique to show}) 3. Nc6 {[pgndiagram] And  amazingly, Black's queen is caught and White remains a piece up. Brilliant} *