Wednesday, July 31, 2019

Bubbe in Boston, Part TWO!


Greetings and salutations from Bubbe, talking more about score stats from my Boston weekend.

It wasn’t a typical tournament for me. Not at all. I usually get about 250-325 points in twelve rounds—falling somewhere in the 3rd quadrile--because I have no poker face. I make it obvious when someone discards a tile I need, which limits me as a tournament player. In my book, Searching for Bubbe Fischer, I say that on average, over time, among well-matched players, you should expect to win 20% of the games and end another 20% as wall games. So, based on that, what kind of a tournament score would be “average”?

In 48 games, generously rounding the 20%, each player would win 10 times with 8 wall games. Some are 25 points, some are more; we’ll call it 30 points per hand. In addition, the tournament I attended awards 10 points for self-picking and 20 points for a jokerless “non-Singles and Pairs” hand, plus 10-25 point penalties for throwing winning tiles. 

Going by those standards, the “average” player (before penalties and bonuses) should get:

10 wins @ 30 points/hand           300 points

8 wall games @ 10 points/hand   80 points 

Every winning game ends with a self-pick (bonus of 10 points), or calling for a discarded tile (10-25 point penalty to the person who threw it). The winner had a little more than a 25% chance of picking her mahj tile and a little less than 75% chance of calling for it—she only gets 25% of the picks, but her chance increases because she might also pick a tile to exchange for a joker. Let’s say she has a 31% chance of self-picking, on average.

Meanwhile, each of her opponents has slightly less than 25% chance of incurring the “throwing” penalty, which can range from 10-25 points. The majority of penalties are going to be 10 points for throwing to zero or one exposure, but there will be the occasional 20 or even 25 point penalties for throwing to multiple exposures. On average, let’s call it a 11 point penalty, and each player would be expected to throw to 23% of the 30 wins made by other players, incurring 7 penalties (rounding up).

                31% chance of self-picking           31 points for 10 wins
                23% chance of 11 point penalty -77 points for throwing to 7 opponents’ wins

In addition, in my stats the 20 point jokerless bonus was very rare (only 5% of all wins that I saw). Let’s be generous and say 10% of 40 games, or four hands, are jokerless winners, so we can expect an average of one jokerless win per tournament per player, resulting in a 20 point bonus.

I would estimate that the average score for 12 rounds should be something on the order of 

                                300 + 80 + 31 – 77 + 20 =  354, or just under 30 points per round

This estimate was a bit low. Per Sheryl Perry, the scorekeeping maven of DMJ tournaments, the mean (average) score was 380, the median (center ranked) score was 370 and the mode (most common) score was 420! Note: a previous tournament, with almost twice as many competitors, had a mean score of 382.

In my previous article, I vaguely alluded to my performance: I was dealt the average amount of Jokers (2/3 per hand, or 32 overall) and a few extra Flowers (3/4 per hand, or 36 overall). When I got bonanza deals of three Jokers or four Flowers, I ended up winning the hand. I also said that 31%, or a sizeable chunk, of my winning hands were “CR5” (the fifth hand in the Consecutive Runs section):

                                                 FFF 1111 2222 DDD

31% is 4/13; in other words, CR5s were four of the thirteen hands that I won, out of 48. That’s a fairly good performance, a little better than one game per round. I also hung on for 10 wall games. In total, I “didn’t lose” 23/48, almost half the games (48%), significantly higher than the expected 20% win and 20% wall games. I only threw the mahj tile in four games, so suffered 40 points’ worth of penalties. I had 4 self-picked hands (above the “average” 3) and one jokerless “regular” hand.
Most importantly of all, I didn’t just stick to 25 point hands. I took advantage of Jokers to make Quints:
                                                 
                                                Q1: 11 222 3333 44444
                                                Q2: FFFF 11111 NNNNN

and made the best of having no Jokers at all with the sixth Singles and Pairs hand, two suits of consecutive numbers with matching Jokers:

                                                SP6: FF 11 22 DD 11 22 DD

In addition to the Singles and Pairs hand, I made another closed hand, in Like Numbers:

                                                L2: 11 DD 111 DDD 1111

Compared with my "expected average," I won three more games, completed two extra Wall games, played several high-scoring hands, finished one “regular” hand without jokers, and had three fewer penalties for throwing mahj tiles. These were all things of which I was quite proud.

Strategy-wise, tournament play can be different than your regular game. I generally love to play difficult hands with my group (they joke that I’m always going for Quints). I only play once a week, so I challenge myself to try interesting hands. After all, life’s too short to play boring mah jongg.
However, a tournament can be a different story. Let me explain:

I played a steady, regular game during the Friday evening session and landed in a five-way tie for 12th place (out of 84). In the Saturday morning session, I got the jokers for Quints and made the Singles and Pairs hand, and by noon I had moved all the way up to a tie for 2nd place!!

It made me think about actually finishing “in the money,” so at that point, halfway through the tournament, I went for simpler hands as the most direct way to score points. After all, you only get points for mahj-ing first: if I wanted to continue to do well in the tournament, I would have to go for the most attainable hand, rather than the most interesting. I still couldn't force tiles to come to me, though; other players got hot while my tiles got cold, and I moved down to 6th place by Saturday evening. Sunday started slowly, too, but I eked out two quick wins in the last round on Sunday. It was VERY close: my 520 points meant that I ended in a tie for 8th place.

What about you? What are your tips for winning in a tournament? You can always contact me at bubbefischer@gmail.com ; I love hearing from you!

Talk to you soon!

Bubbe Fischer

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