Drop7 Research coverDrop7 ResearchPuzzle

Drop7 Research

Sixteen years ago, I wrote a Java program which tried to pick the ideal move in a puzzle game called Drop7.

by drop7.dev

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What it is

Drop7 Research is a browser version of the puzzle game Drop7, paired with an open-source project trying to build an autonomous strategy that can score over one million points. It offers a playable game, a global leaderboard, and a collection of research notes on search algorithms and machine-learning players.

From the developer

In the developer’s own words, from drop7.dev.

Sixteen years ago, I wrote a Java program which tried to pick the ideal move in a puzzle game called Drop7. On each turn, the player only has seven choices for their next move, but there is also an element of chance which turns this simple game into a surprisingly difficult problem involving search, hidden information, long-term planning, and chance. I renewed my investigation this weekend, into whether there is an autonomous strategy that averages more than one million points per game. An experienced human player can score a million points with long-term strategic thinking, but the best automated strategies I could come up with are currently averaging around 300k-400k points. One of the easiest ways to contribute to advancing this research is to compete on the global leaderboard and submit your human strategy - https://drop7.dev/compete . This project has also been an enlightening experiment into using agents as research collaborators and evidence collectors. Repository: https://github.com/keshavsaharia/drop7-bench I’d especially appreciate feedback from people who are knowledgeable in game theory, stochastic planning, learned value functions, or heavy-tailed evaluation. How would you approach long-horizon action ranking here? I’d also love to hear whether the research makes sense to someone encountering the project for the first time.

Editor takes

BeaThe Jam Judge
“A no-frills browser game carrying a surprisingly deep research project—small scope, big idea, even if the presentation barely tries.”
JunoThe Puzzle Purist
“Clear seven-column rules and an honest open problem: the strongest candidate still averages 516k, so the aha is seeing how far search is from a million-point human.”
NicoThe Commuter
“Quick to drop in for a few rounds, but it reads as a desktop/keyboard game and I didn't spot save or mobile support—so it's only a break-time game at a desk.”

How to play

A new disc appears after each move, and you choose one of seven columns to drop it into by clicking the column. Match discs and clear the board to score points, while keeping the board from rising too far before it fills up.

Tips

  • Use the Learn section first to understand the rules and scoring before competing.
  • Think several moves ahead: Drop7 rewards long-term planning more than immediate clears.
  • Watch the rise indicator and avoid letting the board stack too close to the top.
  • Try a mix of safe clears and moves that keep future column options open.
  • Compare your scores on the leaderboard and experiment with different strategies to improve.

Questions

Is Drop7 Research free to play?

Yes, the game is playable in the browser at drop7.dev, and the project is also open source with code available on GitHub.

Do I need to install anything?

No, it runs in the browser without installation.

Can I contribute to the research?

Yes. One of the main ways to contribute is to compete on the global leaderboard and submit your human strategy, which helps benchmark how strong automated players need to be.

What is the goal of the research?

The project is looking for an autonomous strategy that can average more than one million points per game, matching the skill of experienced human players.

Is this the original Drop7 game?

It is a browser-based implementation of the same puzzle concept, built as part of a research project rather than an official port.

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