+ - &SET-MSB-DEFAULT
+ action_class: 'GainMSB'
+ required_bits: []
+
+ - &KNIGHT-MSB-DEFAULT
+ action_class: 'AllowChessMoveIfMSB'
+ required_bits: []
+ data: {'chesspiece': KNIGHT}
+ - &CASTLE-MSB-DEFAULT
+ action_class: 'AllowChessMoveIfMSB'
+ required_bits: []
+ data: {'chesspiece': CASTLE}
+ - &BISHOP-MSB-DEFAULT
+ action_class: 'AllowChessMoveIfMSB'
+ required_bits: []
+ data: {'chesspiece': BISHOP}