stats in-game

doc/game_logic.md

@@ -92,8 +92,17 @@ Since we work with a great deal of different size and shapes, the rules for spin
 
 ## Score calculation
 
-- For every position soft dropped, add 1 to the score
-- For every position hard dropped, add 2 to the score
+- When locking a piece, add 1 to the score if it is due to lock delay, or 10 if it was hard dropped.
 - When clearing one line, add 100 to the score, 200 for 2 lines, 400 for 3 lines, 800 for 4 lines, 1600 for 5 lines, etc.
 - If the line clear is a spin, count the score like a normal clear of 2x more line (200 for 1-line spin, 800 for 2, 3200 for 3, etc.)
 - When performing a spin, a mini spin, or clearing 4 or more lines, B2B is activated, every subsequent line clear that is a spin, a mini spin, or clear 4 or more lines, scores twice as much
+
+## Grade calculation
+
+Grade is an alternate system to line clears.
+
+- Each time a piece is dropped, 1 point is added to the total.
+- For each cleared line, 1 point is added to the total.
+
+The only exception occurs when the total ends in '99', a line must be cleared to progress.
+When this line is cleared, the point of the piece is also counted towards the total.