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It was in 2008 when I had finished my chess server WebChess X using open source code WebChess. I opened my chess server and found it was thriving but had a problem with some users cheating. I spent a few months in mid-2008 racking my brain as to how to solve the problem.
I eventually came up with an idea. Why not create a test which randomly quizzes users with chess puzzles but make it time constrained and rated so I could validate that the ELO of the user was still consistent with the results they were getting.
So I wrote the code in PHP utilising my database of over 10 million chess positions. I also used some open source code called LT PGN VIEWER by Lutz Tautenhahn which was had a guess-the-move app, problem board script. The app recognises FEN strings from a pgn files of game fragments and matches the move played with the move string loaded. The app I built was simple it randomly selected a position and asked the user to play the winning move. It had to be just that move because their answer would reveal their ELO and whether they were human or a bot. The guess-the-move app had three guesses before it revealed the answer and I built that into my app as three strikes and the test stops or you run out of time, 3 strikes and you’re out, that was unique feature as no chess puzzle app in the world had ever done this at the time. Another unique feature was adding the countdown timer and the flipping the board so that you solved the position from the right point of view of the player to move, believe it or not this was not standard, as the standard was to solve from the point of view of the white side even for puzzles with black to play, like newspaper puzzles or CT-ART and other puzzle apps were working at the time. Over the proceeding months I began refining the app. My original web app is still running on the web archive just in case anyone wants to have a look.
I created a Facebook page called Chess Club Live and would direct fans of my page to register on WebChess X.Then the unthinkable happened I closed my chess website WebChess X because maintaining and running it was taking so much time and there were better alternatives like Lichess, which was and still is just awesome.
However I decided to keep the cheat tester app as an independent app which I called at first Chess Gym, then later Chess Master Cube.
I had read a book by Michael de la Maza called Rapid Chess Improvement and it gave a detailed description of how a tactics trainer with graded puzzles could be solved in a schedule of increasing difficulty and that the improving player would take less time to solve them. At the same time there was a TV show called The Cube, where contestants were locked in a giant cube and physical and mental challenges were thrown at them with a countdown timer, hence the inspiration for the name and the challenging feel of the app.
I had various beta versions of the app but in late 2012 to early 2013 I published the app Chess Master Cube with 3 strikes and you’re out with a countdown timer from 5 second sessions to 5 minutes sessions. I had a Facebook page now of many thousands of fans and they loved it. They could post their scores on Facebook and top the leaderboard which was updated in real time. I also built real time reports which displayed the overall estimated ELO performance and score as well as estimated ELO in tactical and strategic themes.
I began conversations with chess.com CEO where I told him about all my chess projects including Chess Master Cube which culminated in him offering a job to do “social” for him. He said he liked what I had done with Chess Club Live and he had struggled to pinpoint our products but he knew it was me that was the unique selling point, my talent. Flattered though I was I declined the job offer and kept promoting this early original Puzzle Rush.
I created more versions of it like ones which just quizzed you on the endgame or a specific opening, and even one version that was a timed guess the move for a specific game by Fischer, Kasparov, Tal or some other chess legend and calculated your ELO and kept a running score and real-time performance stats.
It grew on popularity as I kept promoting on my Facebook page Chess Club Live and posting messages to chess professional players and chess coaches to introduce them to the accelerated learning aspect of the app. I got mixed responses from people who complained about the apps graphics instead of its playability.
Borislav Ivanov, a Bulgarian Candidate master strength player, started posting really really good results after we published the training app and we interviewed him and he hinted that he might have been using a training app of some description. I suspected it was my app he was using but he wouldn’t admit that he was using my app to improve though seemed to know about it.
Many other people did testify to having improved significantly after using the app. At least one person used the app in the run up to a national chess championships and won the championships after training heavily with the app for months beforehand.
In 2018, I entered a customised version of my app to a PokerStars.com competition “My Chess Poker Game” organised by Jennifer Shahade for a new chess game/app co-sponsored by chess.com and judged by some of their staff, chess poker aces Liv Boeree and Daniel Negreanu. There was a chess.com staff member who judged my app then announced he had a new idea which would replace Chess but that he could say more until after the competition. Another chess.com staff judging the competition was Danny Rensch the COO (Chief Chess Officer) of Chess.com. What I find curious is I never got any feedback about my app from any of the judges and when I tweeted Danny he wouldn’t respond.
I didn’t win the competition but chess.com produced Puzzle Rush after the competition and it worked the same way as my app. I was stunned.
I talked to the Chess.com CEO, Erik Allebest about and he claimed not to know about my app. And the Puzzle Rush feature had been a long time in the making and not based on his knowledge of my app. Danny Rensch was unavailable for comment and blocked me on all social platforms. Again highly odd given he had judged my app and knew me over the years, we retweeted each other, and as co-founder of a chess community he would have known about my work in general, but all of a sudden would not communicate. I started feeling like I was being stonewalled.
So according to CEO Erik Allebest, Chess.com the world's biggest chess website had an idea to revamp their tactics trainer and were sitting on it for years not improving their website feature with this terrific idea until they judged a competition in which I presented the same features I had created 10 years earlier and then after the competition they released their version. We are supposed to believe that this is the real story of chess.com independently discovering Puzzle Rush after the same Puzzle Rush type app was widely known and being played for 10 years promoted by the world's biggest organic chess social network. Ok maybe, well see... but it didn’t add up to me. I started posting comparisons between the two apps and getting testimonies from my Chess Master Cube users who were also convinced I had created Puzzle Rush as it was strikingly similar.
Perhaps the real story is not that an idea created by me was taken without any regard for the intellectual property rights and copyright but how an app that was so addictive and powerful at improving chess performances was hidden for so long in plain sight and how chess.com translated a prototype version of it and brought it to light.
I invite you to decide, play Puzzle Rush and then play my app, Chess Master Cube.
Puzzle Rush: https://www.chess.com/puzzles/rush Chess Master Cube for Android Smart Phone: https://play.google.com/store/apps/details?id=com.gmail.mmkpadi.chessmastercube&hl=en
New Version of Chess Master Cube - Web App - https://social.chessclublive.com/ChessPuzzleTrader

Is there an app that simulates real life poker situations or play against AI to help understand basic calculation of pot odds and outs?

I figured I should share my Poker Bot Story with Reddit and how I got kicked off of PokerStars. I wrote a Poker Bot back in the 2007-2008 timeframe (when poker was at it's peak). I used Java with a lot from the Robot class to take screenshots, examine them programmatically, make a calculated decision, and use the Java Robot Class to control the mouse and make the plays all without touching a thing once it was running. I had way too much fun with this project. I will say this, the bot I made was NOT designed to collude with other bots, and that was never a plan. I really hate cheaters. I never saw what I was doing as cheating or breaking the rules, but it definitely was breaking the EULA terms, and I totally understand why I was kicked off their site. I saw this as teaching the dumbest thing ever, a computer, how to read cards and play poker like a human. This is really what programming is. Teaching an object that only knows how to handle 1s and 0s how to do something.
There is one remaining remnant of this project. AndroidPoker. As the name implies, this is an Android app (that's FREE and in the Play Store - I'm not selling anything) that takes user input for known cards and number of players and tells the approximate odds of winning, and a general idea of what to do next.
I started this project to freshen up my programming skills after doing nothing technical for a semester abroad in Germany. I began by writing a card calculator (similar results to what ESPN would show during poker hands - Monte Carlo method - lots of random hands) that manually took in the card information from a web page front end (J2EE as I had an internship as a programmer writing J2EE code - now Java Platform). Then I took that and built a screen reader which would find the location of Poker Table window, read the cards (based on some simple pattern recognition), and input the known cards (mine and the community cards) into my card calculator. I could calculate my approximate win percentage based on how many people were dealt in, and make some decent play based on that. I only designed it to play at limit tables first, and never really implemented a way for the Bot to know it's position relative to the dealer button/blinds. That's one thing I was working on when it all ended. There was the perfect environment for testing as lots of people played in the play money areas (remember .net vs .com sites that were advertised - couldn't advertise the real money sites on US television). Anyway, I eventually took the bot to very low real money tables (1 cent / 2 cent), and the bot could be relatively successful when the tables were fairly full, but when down to smaller number of players, more bluffing naturally ensues and the bot was not programmed well to handle this yet (I was also working on this). I never won or lost any large amounts of money doing this. Eventually PokerStars caught on, and noticed that my Bot was playing 10+ hours in a row without sitting out a single hand on 1 cent / 2 cent tables, and would throw some popups at it (which my bot never handled properly, it just bombed out and I'd see a bunch of popups when I came back and checked on it). I didn't think much of these popups until afterward, but they were of course tests to see if I was a human or a bot, and this was what stopped it all. I shouldn't have been so lazy and not watched the bot while it was playing...
I hope you've enjoyed my first programming post!
Here's the last response I got from Pokerstars on January 24, 2008 when I get booted (I tried to appeal before this email):
Hello Carl,
Thank you for sending your ID. Everything there looks to be in accordance with information you've provided us in the past, including your Minnesota permanent residence. I wish I could say the same thing regarding the data gathered from your gameplay.
Unfortunately, your statement that you were not using an automated bot player is in direct conflict with multiple observations and tests performed against your account. An analysis of the many aspects of data we gather for bot reviews was performed not only by me, but by several peers on the Game Security team who unanimously concurred with the finding, including my supervisor, who concurred with and OK'd this action.
As I wrote before, we cannot detail the nature of the data we've gathered as to do so would compromise the security of future bot reviews against other players. We do not wish our bot detection methods to fall into the hands of bot developers, who would use that knowledge to better avoid detection. I will tell you that the evidence against you is not just one particlar item, but a myriad of different items that all without exception indicate "bot". You didn't fail just one test, you failed them all, including several real-time tests.
As such, your account must remain closed.
Sincerely,
Jeff PokerStars Game Security
Edit: here is all the code: https://drive.google.com/file/d/0B-NprxVaBNNSQXNaamh2ei1EU1lvclBBV3FOMV9TYTNjdnU4/view?usp=sharing