Double Atari
A double atari is a play that simultaneously puts two groups of stones into atari, i.e., it reduces the two groups to one liberty each. This is a special case of a double threat.
https://senseis.xmp.net/?DoubleAtari
This tag gives a hint.
Created by TwT.
Other tags:
Diabolical, 2-1 point, Attack, Bamboo Joint, Belly Attachment Tesuji, Bent Four in the Corner, Bulky Five, Carpenter's Square, Clamp, Comb-Formation, Connect, Crane's Nest, Dame, Damezumari, Door Group, Double Atari, Double Ko, False Eye, Fuseki, Geta, Golden Chicken Standing on One Leg, Haengma, Hane, J-Group, Joseki, Ko, L+1 Group, L-Group, Ladder, Loose ladder, Miai, Monkey Jump, Moyo, Nakade, Nose Tesuji, Oiotoshi, Oshi-tsubushi, Patting the Raccoon's Belly, Placement, Rabbitty Six, Sabaki, Sacrifice, Seki, Semeai, Semeai Type 1, Semeai Type 2, Semeai Type 3, Semeai Type 4, Semeai Type 5, Semeai Type 6, Sente, Separate, Shimari, Snapback, Spiral Ladder, Squeeze , Superko, Symmetry, Tenuki, Throw-in, Tombstone, Tsumego, Under the Stones, Weak Carpenter's Square, Yose [Create new tag]