Observed arrival · 2026-11-12
Shogi AI Opening Viewer: Theory Meets Game Records
An interactive shogi board compares opening-book candidate moves and evaluations with move frequencies and results from floodgate games.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Shogi players studying openings and game records
- Worth noticing
- It combines 2.33 million positions from the New Petashock opening data with 83,661 qualifying floodgate games.
Field notes
The board starts from the initial position; users can choose a candidate, move pieces—including moves absent from the opening book—or enter a position using SFEN, USI position commands, or a move sequence. The site says its opening source, 新ペタショック定跡, contains 2.33 million positions, while the floodgate comparison covers games from 2024-11-10 through 2026-11-12 with both engines rated at least 3,500; win rates count draws as half.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
One card from the complete issue