Frequently asked questions

Kuikma Chess is an online chess training service by Sigmoid Technologies. You are shown real positions from every common opening, from the second move to the endgame. You play the move you think is best, and the app shows how it compares with Stockfish's top moves and why the best move works.

No. Kuikma runs in your web browser on desktop and mobile. On a phone you can also use your browser's "Add to Home Screen" option to open it like an app.

Click Sign up, enter your name, email and a password (at least 8 characters), and solve the CAPTCHA. We then email you a link to confirm your address. You can start training straight away; a confirmed email is needed before you buy Pro.

Each position has been analysed in advance by Stockfish. Your move is compared with the engine's top moves and rated by how much it loses (in centipawns):

• Excellent: the best move or practically as good
• Good: a small loss
• Okay: a noticeable loss
• Poor: a serious mistake

After every attempt you see the best move, the engine's top lines and your move's evaluation.

Every position has a difficulty rating. Your training rating goes up or down after each first attempt at a position, Elo-style, depending on the result and the position's difficulty. Adaptive mode then picks positions near your rating, and you can make them easier or harder in Settings.

Yes. Positions you get wrong go into your review queue. They come back after about 10 minutes, then after 1, 3 and 7 days as you solve them, and count as learned after four correct answers in a row. Choose "Review failed" as the source in the trainer, or use "Practise failed positions" on your Profile page.

Yes. Click the ☆ Save button in the trainer. Saved positions are available under the "Saved" source.

In Settings you can set how many positions you aim to solve each day. Your progress and your streak of days meeting the goal are shown in the trainer and on the home page.

Every so often (after at least 20 positions and 7 days, whichever comes later) Kuikma summarises your recent training: accuracy, strengths, weaknesses and what to practise next, with links straight into matching training. Pro members get reports written by our AI coach; on the Free plan the report is a summary of your statistics.

Yes. Go to Settings → Appearance to choose from more than a dozen board colours and several piece sets, and to turn coordinates, legal-move dots, move sounds and move confirmation on or off.

The Free plan includes 5 training positions a day from our Stockfish-analysed library, with the best move, the engine's top lines and rule-based coaching notes after each attempt. It also includes the square-control map, the analysis board (without a live engine), reviewing failed positions, saved positions and the game database.

Pro adds live Stockfish analysis of any position on the analysis board, full-game Stockfish reviews (10 a day), the AI coach on every move, AI explanations and coach reports, importing your Lichess and Chess.com games, generating up to 50 new positions a day from your own FEN / PGN, HTML reports, and up to 200 training positions a day.

Pro costs ₹999 (Indian rupees) for 365 days. It is a one-time payment: there is no subscription and nothing renews automatically. See the Plans page for the current price.

Where available, you can pay by card, UPI, net banking or wallet through our payment gateway, which activates Pro immediately. You can also pay by direct UPI transfer or PayPal and enter the transaction reference; we verify it and activate Pro, normally within 2 working days.

Daily allowances reset at midnight, India Standard Time (IST). Re-opening a position you already opened the same day doesn't count again.

No. Pro is a one-time payment for a fixed period and never renews by itself. When it ends, your account goes back to the Free plan and all your training history is kept. Buying again adds the new period to any time you have left.

Yes, you can request a full refund within 7 days of purchase. Duplicate payments, or payments debited without Pro being activated, are always refunded in full. Approved refunds are processed within 7 days to the original payment method. See our Refund Policy for details, or write to sigmoidvedantatechnologies@gmail.com.

Gateway payments activate within a few minutes and manual UPI / PayPal payments within 2 working days. If Pro is still not active after that, write to sigmoidvedantatechnologies@gmail.com with your registered email address and the transaction reference and we will sort it out quickly.

Click "Forgot password?" on the log-in page and enter your email. We send you a reset link that works once, within 1 hour. If the email doesn't arrive, check your spam folder or write to sigmoidvedantatechnologies@gmail.com.

Check your spam or promotions folder. You can send a new link from the banner at the top of the page after you log in. Each new link replaces the previous one.

We use your data only to provide the service: your account, training history, payments and support. We do not sell your data. Card and UPI details are handled by the payment provider, not stored by us. See our Privacy Policy for the full details.

Write to sigmoidvedantatechnologies@gmail.com from your registered email address and ask us to delete your account. We will delete your personal data, except payment records we must keep by law.

Email sigmoidvedantatechnologies@gmail.com, call +91 74060 53777 (Monday - Friday (9:00 - 18:00)), or use the form on our Contact Us page. Sigmoid Vedanta Technologies, Cheruvickal, Sreekaryam, Thiruvananthapuram - 695017, Kerala, India.