v1.9.5.2

• Added LeanCRC
• Optimized LeanChess960 (-3 bytes)

v1.9.5.1

• Auto-restore square address in LeanChess960 (-2 bytes)

v1.9.5

• Remove extraneous push/pop in BIOS (-1 byte)
• Replace push/pop/push with assignment in DOS
• Swap index registers' semantics

v1.9.4

• Initialize max value as 0 (-1 byte)

v1.9.3

• Swap registers' semantics (-2 bytes)
• Unified square read and write in undo (-2 bytes)

v1.9.2

• Reversed subroutine calls (-2 bytes)
• Unified move initialization (-1 byte)
• Fall through king's vectors (-1 byte)

v1.9.1

• Unified pawns in Classic (-2 bytes)
• Fall through init_db in Classic (-1 byte)
• Unified square reads and writes (-1 byte)

v1.9

• Moved zero vector check to end of loop (-4 bytes in Barebone)

v1.8

• Derive pawn's vectors from bishop's (-3 bytes)
• Save/restore vector with push/pop (-1 byte)

v1.7

• Fixed pawn's vector check in Barebone (+3 bytes)
• Invert vectors (-9 bytes)