Special Interest
ShelfForge
Remember the chess tactics you've learned. A calm study shelf quizzes you on real positions — look, decide your move in your head, then reveal the strongest move and grade yourself. Spaced practice brings the hard ones back until they stick. On-device; nothing leaves this device; no account. Ages 9–14.
▶ Play it nowBuilt for sittings of about 20 minutes on the screen. That is our design budget, not a measurement.
Meet your mentor
Every Spark & Anvil app has a friendly mentor character that demonstrates, asks, and patiently scaffolds learning.
Mentored by Curator
#a85a12 Characters who teach
Meet the cast
ShelfForge's study crew (ages 9–14) each embody one study-science rule — the crew IS the method: recall the move before you peek, meet a position again just before you forget it, mix the tactics up, and let the ones you miss come back sooner. Mentor Curator keeps the shelf: little and often beats cramming, and a miss is information, not a verdict.
Recall
Active recall — pull the move from memory before you peek; retrieving is what makes it stick
Spacing
Spaced repetition — meet a position again just as you're about to forget it
Interleave
Mixed practice — shuffle the tactics so you can't run on autopilot
Sift
The three-pile sort — the ones you miss come back sooner; the ones you've got rest
Anchor
The memory hook — tie each position to its one idea so it sticks
Ponder
Predict before you check — decide your move first; a wrong guess teaches more than a peek
Curator
little and often beats cramming; a miss is information, not a verdict
What's inside
Learning goal
Remember the chess tactics you've learned. A calm study shelf quizzes you on real positions — look, decide your move in your head, then reveal the strongest move and grade yourself. Spaced practice brings the hard ones back until they stick. On-device; nothing leaves this device; no account. Ages 9–14.
Mentored by Curator — no data leaves the device.
How ShelfForge handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ Free — no ads, no in-app purchases
- ✅ No personal information collected from children — in line with COPPA (updated by the 2026 FTC amendments)
- ✅ No chat with strangers — play-together rooms use a short code and preset emotes, never typed messages