Eight points, one real position — Moroni–Iniyan, La Plagne 2026, from the bank. Play it below and watch the card fill. Every verdict you see is the grader's own output on that move, not an illustration.
Write the defence you feared in brackets, with your answer: 50.♖xf2 ♖e8. White's second-best try, met — the grader checks both moves and pays the point. Leave a defence out and a soft prediction costs you instead.
Add −+ after your last move and the card grows to 9. Right, and it is yours; one band out (∓) pays nothing; wrong (=) pays nothing. It is a bet, not decoration.
| Signing in | There is no password. You give an address, we mail a link, and the link signs you in — every time, including the first. A session lasts 30 days per browser. |
| The commit | Committing fixes the analysis. Nothing you learn afterwards — the quiz included — changes a committed score. |
| Their reply | A predicted defence within 1.50 of the best one is fair; beyond that it is soft — the line only beat cooperation. |
| Your deviation | Within 1.00 of best it is accepted — and credited, if it met a moment that mattered. Beyond that but the same result — inexact, noted, never refuting. A changed result — win to draw, draw to loss — is the only error. |
| Another good move | Reach the line's position by another move order, or answer a defence you predicted differently with the same move you had prepared, and you are on the line. Being on it is a fact about the board, not about the characters you typed. |
| The fair stop | You are never asked to calculate past the point where what remains is routine. Depth past it is never demanded and always paid — and if the extra line goes wrong out there, it is shown to you, not charged. Writing more than you were asked can never score below stopping. |
| Your rating | Elo, moved by whether you found the key move. The expected score printed on every card comes from your rating, so a 0.4 on a brutal position can beat a 6 on an easy one. |
| The bank | Mined weekly from the newest tournament games, most only weeks old. Rate a position one to five stars after solving: the best-rated positions you have not seen are dealt first, and anything you rate two stars or less leaves your pool for good. |
Provenance: this position is 3bf3810363e7c0a0
in the bank — Stockfish 16, ten million nodes at MultiPV‑8, key move clear
by 6.71 before it was ever served. The verdicts, centipawn figures and
points on this page are what the grader returned for these exact
submissions at its own probe budget of 600 000 nodes per move; findability
percentages are Maia‑2, weighted across the 1500/1900/2000 audience the
difficulty model is fitted on. Nothing here is hand-written
commentary.