Online Battle · No rules — any move
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Online Battle
Chess Sandbox · No rules — any move
OffUnlimited
1 minBullet
3 minBlitz
5 minBlitz
10 minRapid
15 minRapid
30 minClassical
1 hrClassical
3 hrMax
Custom (min):
Sandbox Partners Legal Join Discord
5-character code from your opponent
OffUnlimited
1 minBullet
3 minBlitz
5 minBlitz
10 minRapid
15 minRapid
30 minClassical
1 hrClassical
3 hrMax

Challenge rule-breaking bots. They cheat, spawn pieces, and ignore chess logic — just like sandbox mode. Wins and losses affect your ELO.

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