Analysis - Ura Suji and Matagi Suji

I wasn't really happy with my previous analyses that included ura suji or matagi suji. The data was kind of noisy. So, this time, I'll be narrowing the search to make it clearer.

Analysis - Suji Effectiveness Based On Riichi Tile

Suji is safer when you have reason to believe your opponent has a good wait. If they have a single wait or a shanpon shape, then suji won't apply to them. There are many tells that indicate that a player might have a good wait, but here, we'll look at a very simple one: the tile they called riichi with.

Analysis - Yaku Rates by Hand Type

People commonly wonder how rare certain yaku are. Something I've been curious about is how common certain yaku are in open hands. So, let's look at the yaku distribution for all hands, riichi hands, dama (closed tenpai without riichi) hands, and open hands.

Training Tool - Akochan Reviewer

Akochan Reviewer is a tool that leverages the akochan mahjong AI to analyze replays. It looks at rank point EV, rather than round/hand EV, and covers efficiency, calling, riichi decisions, and push/pull. It's designed for Tenhou replays, but can work with rounds from Mahjong Soul and anything else if you're willing to put in some work.

Analysis - Ura Rates by Unique Tiles in Hand

I've seen enough people asking about the chance of getting ura dora that I decided to check the Houou replays to see the chance.