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Some analysis

Some plans for future analysis

Board health

Ideas to measure board health

  • simple board fill - Count of positions on the board that are used. This is extremely simple and is already in the analysis
  • modified board fill - count columns that have holes in them, and use that as modifying factor to the simple board fill. The height of those columns (or of highest?) should be a factor too
  • board age - for each used position, track how long (age in pieces spawned) it has been on the board. Health is then the sum of ages. Lower = healthier
    • A low board will have a higher turnover of pieces and better health. A high board will have low rows that are stuck for a long time - as they age the health will decrease, indicating we are high and possibly stuck there...
    • however, it's still not an objective absolute, as two identical boards may register different health
    • discussion in this thread: https://twitter.com/Caber_nl/status/1065174652060909570
  • weighted board fill - count occupied positions in columns. The unhealth of a piece is valued according to how difficult it is to get to. Basically, the more buried a piece is, the higher it scores. Buried holes need to be handled in some form (they are bad), and deep open wells need to be handled (they are good)
    • possible implementation: every occupied position is a point. Those that are on an equal row or higher than the lowest accessible open spot have no further weighting, however each occupied position below that row gets an additional +1 for each row further down. Each unoccupied position (hole!) gets an additional +1.
    • Should it handle horizontal holes (ie don't count quite as strongly because once uncovered, they'll be easier to fill and move on?)

Sociopolitical analysis

The game can be examined as a microcosm of human democratic/communication behaviour!

I wrote some notes about this at one point. There have been many tweets too.

Rhyming game tips

(refer also to My Terminology below)

If there are less rows than four, build it up to score some more
If there are more rows than five, tear it down to stay alive
  • "less than four? build up more"
  • "make a column only if it's to the bottom"
    • on the side build a column, but only if it's to the bottom
    • note: uses non-standard use of "column". Should find a tip to call it a well
  • "more than five? clear some lines to stay alive"
  • "1+1<2" - this is great for sentiment and brevity, but the only people it would be clear to are the power players who know it anyway!

Game Table

Game Theme Start date/tweet End date/tweet Score Cause of death (usually analysis of lower 9 rows) Notes
1 Fruit 16th April 2018 28th April 2018 8375 Capping an I-well (6 deep well on right edge, with a 3deep cap after final scoring move) First game naturally topped the high score table. Board style changed on 19th: https://twitter.com/EmojiTetra/status/986827445251616769
2 Animal 28th April 2018 6th May 2018 6800 Building a non-edge I-well (5 deep) above 4 rows of scattered holes
3 Book 6th May 2018 10th May 2018 2200 mix of scattered holes (3 of them) and two different I-wells (3 deep each, one edge, one not)
4 Aquatic 10th May 2018 12th May 2018 900 non-center I-well (3deep) and then 6 rows of scattered holes Lowest score
5 Heart 12th May 2018 27th May 2018 13850 5 deep left edge well, with a scattered hole below, and several above New high score. Board style changed on the 22nd: https://twitter.com/EmojiTetra/status/998831537196908549
6 Clothing 27th May 2018 1st July 2018 41275 6 deep right-edge well above two lines of scattered holes, and capped Bug caused in-game delay at GAMEOVER screen (how long?). New high score. Board style changed on 5th June: https://twitter.com/EmojiTetra/status/1003930144908558336
7 Plant 1st July 2018 5th July 2018 3675 full height edge well on the right
8 Fruit 5th July 2018 16th July 2018 13725 Fastest start to a game to date due to empty board bonus on poll 20
9 Heart 16th July 2018 8th August 2018 26650
10 Animal 8th August 2018 27th August 2018 20075 Game paused for 24h on 2018-08-14
11 Aquatic 27th August 2018 5th September 2018 11925
12 Book 5th September 2018 11th September 2018 6300
13 Plant 11th September 2018 15th September 2018 3950
14 Heart 15th September 2018 19th September 2018 3225
15 Clothing 19th September 2018 1 January 2019 127400 Altered to a Halloween theme over Halloween and Christmas theme over Christmas. First game to have a >4 run of same-piece. Had a run of 5 and a run of 8. See EmojiTetra/DeepStatistics for more info. New high score.
16 Plant 1st January 2019 17th January 2019 20050 First game to score uninterrupted sequential tetras. Initially Christmas theme chosen randomly, then re-randomised to plant. First game to recover from a 50-full near-death board experience
17 Aquatic 17th January 2019 6 February 2019 23400
18 Plant 6th February 2019 - 17th February 2019 11975 Feature add on 10/Feb: Intermediate board showing cleared lines
19 Book 17th February 2019 @EmojiTetra - current game 1200+ First 1100 empty board bonus. Fastest first 24 hours, due to a tetra on poll 43 and then an empty board bonus on poll 51

Note: my timezone is UTC+10 and my dates reflect that. I hope to direct link to tweets sufficient that they can be used for exact time lookups if needed

Board styles / known feature changes

  1. Start of Game 1 from the 16 April 2018: score in blocks, then unicode SOON, then linedrawing to illustrate NEXT piece
  2. During Game 1 on the 19 April: unicode SOON replaced with unicode F-FWD
  3. During Game 5 on the 22 May: Literal "Next", then braille indicator of next piece. Then literal "Score" in and score in plain text
  4. During Game 6 on 5 June: "Next" and score moved to right of board. Next illustrated with emoji same as board
  5. During Game 18 on 10 Feb: "The bot will now tweet a rendition of the game grid with filled rows marked as disappearing, with the score benefit shown." - https://twitter.com/emojitetra/status/1094340439849615360

Notable events

Empty Board Bonus

Most are with doubles scoring 1250. Exceptions noted

Longest activity on the same piece

(todo: backfill this with any other triple-spins)

Start date/tweet Game Poll count Rotations (spins) Notes
28 April 13 T piece: Down, Rotate, Rotate, Rotate, Left, Down, Right, Right, Down, Down, Down, Down, Plummet (note: plummet-after-down option not yet available in game)
22 May 14 J piece: Right, Right, Down, Rotate, Left, Left, Down, Down Down, Left, Left, Rotate, Rotate, Plummet
18 July 15 11 (2.75) L piece
18 Aug 15 11 (2.75) L piece
3 Dec 15 15 12 (3) J piece
15 Dec 15 16 13 (3.25) J piece
30 Sept 15 17 13 (3.25) T piece
25 Sept 15 17 14 (3.5) J piece
29 Dec 15 20 18 (4.5) L piece

My Terminology

(note: this is what I endeavour to use, and while I encourage others to use, it is in no way formal or endorsed. Most of it is what is commonly used already)

  • board: play area (7x11 squares)
  • column: a vertical sequence on the board from top to bottom (11 spots)
  • line/row: a horizontal sequence on the board from left to right (7 spots)
  • clear - to clear some rows
  • single/double/triple: to clear 1/2/3 line(s)
  • tetra/quad/tetris: to clear 4 lines
  • collective/hive/electorate/crowd: everyone who votes
  • hole (1): an unfilled space that is surrounded
  • overhang/half-hole: an unfilled spare that is covered at top, but open to the side
    • some overhangs can be underfilled by a side slide. But not all
  • clean - board without holes. as in "the board is clean" and "this is a clean drop"
    • question: is a half-hole a clean board?
  • dirty - opposite of clean: a board with a hole. "the board is dirty". "this is a dirty drop"
  • well/hole (2): a space perfectly suited for a single piece. Usually I-hole, sometimes J or L-hole.
  • silhouette/skyline: the shape of the top surface
  • empty board: nothing on the board. a perfectly flat skyline, as per the start of a game.
    • I prefer 'empty' to avoid possible ambiguity with clear or clean, however this is where my usage diverges most from the electorate
  • fossilised - to refer to how long a row has remained unchanged




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