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[Bud]

000000200500800610100004000001690003007083900200047006005300008012008007006000000

After making basic moves the puzzle is as shown in the diagram below. The 4 cells in the almost hidden XY-Ring iare denoted by *. Note that a 2 conjugate is in column 2 of this pattern, a 7 conjugate is in row 2, a 6 conjugate is in row 3, and an almost 3 conjugate is in column 5. If this xy-ring is true, all other digits can be eliminated from these 4 cells. Note that this will occur if cell B<>3.
Next note the 23579 ALS with cells labeled A in box 2. This becomes a locked set 2579 if cell B=3. in either case r3c5<>257.
Also if B=3: (3)r1c5-r1c8=(3)r3c78, which implies that r3c2<>3.

Note that these eliminations are valid whether the xy-Ring is true or false.