Bobspin Triple Opener

The Bobspin Triple Opener (Ben's One Bag Spin Triple Opener), often shortened to Bobspin, or the BEST Opener (Ben's Easy Spin Triple Opener) is a practical opener which gives a forecast T-Spin Triple in the first bag. This setup was invented by players Alphapentago and Ethryn.

The setup requires O before S and I before L or J.

Forecast Setups
To complete these forecast setups, wait to receive garbage lines before placing the last piece apart from T.

First Bag T-Spin Triple
There is a 10% chance to get the following board, giving a T-Spin Triple in the first bag.

Second bag C-Spin
There is a 1% chance to get the following board, giving a C-Spin in the second bag.

Floating T-Spin Triple
If a first bag T-Spin Triple is not possible, a second bag floating T-Spin Triple can be made instead if Z comes before S and I, O comes before I, by placing the first bag T on the left.

Note: The Z piece is spun in using a twist


 * Perfect Clear after 8 lines

If garbage has not been received, you may get a Perfect Clear opportunity (91.07% PC rate), with [https://harddrop.com/fumen/?v115@9gA8zhilR4B8i0ywD8Rpg0glwwR4C8RpF8JeAgWXAv?untCMO88AwnoRBS4/DB4ngHBFr4AA9gA8zhBtywB8i0ilD8?Rpg0glBtwwC8RpF8JeAAPXAviPFDUO88AwnoRBS4/DB4ngH?BFr4AA9gA8Bti0zhB8BtilwwD8Rpglg0ywC8RpF8JeAAPXA?vOUFDKO88AwnoRBS4/DBwngHBFr4AA9gA8zhglQ4ywB8i0g?lR4D8Rpg0hlQ4wwC8RpF8JeAAPXAPNUPCUO88AwnoRBxCIO?BwngHBFr4AA9gA8Btywg0ilB8BtwwR4glD8RpR4i0C8RpF8?JeAAPXAPtjWC0P88AwnoRBRBAEBzngHBFr4AA9gA8zhR4yw?B8h0R4RpD8g0ilRpwwC8g0glF8JeAAPXAvintCUO88AwnoR?BRB45A5ngHBFr4AA9gA8ywg0glzhB8wwilBtD8Rpi0BtC8R?pF8JeAAPXAvX8LC0P88AwnoRBx8vKB1ngHBFr4AA9gA8zhh?0AtR4B8glRpg0BtD8glRpg0AtR4C8hlF8JeAAPXAMnzPCTO?88AwnoRBx8vKB1ngHBFr4AA9gA8hlzhAtR4B8glg0RpBtD8?glg0RpAtR4C8h0F8JeAAPXAvfjWCTO88AwnoRBx8vKB1ngH?BFr4AA9gA8i0R4zhB8glR4wwBtD8glg0ywBtC8hlF8JeAAP?XA6OstCKO88AwnoRBR7nAB4ngHBFr4AA9gA8ywilAtR4B8w?wi0BtD8Rpglg0AtR4C8RpF8JeAAPXAv3/wCzS88AwnoRBR7?P9AyngHBFr4AA9gA8hlRpBtywB8glRpg0BtD8glR4i0wwC8?R4F8JeAAPXAzvaFDse88AwnoRBx5XHB5ngHBFr4AA9gA8zh?ilR4B8h0AtywD8g0BtglwwR4C8g0AtF8JeAAPWA6/9tCMO8?8AwnoRBYlXOBFrnRAylAAA9gA8zhh0ywB8ilg0RpD8glR4g?0RpwwC8R4F8JeAAPWATn/VCUO88AwnoRBYlm2AFrnRAylAA?A9gA8hlR4RpywB8R4Ati0D8glBtRpg0wwC8glAtF8JeAAPW?A6vbgCse88AwnoRBX1h9AFrnRAylAAA9gA8ywAtRpilB8g0?BtRpglD8i0zhC8wwAtF8JeAAPWApfrgCse88AwnoRBX1h9A?FrnRAylAAA9gA8ywg0glzhB8Q4ilBtD8R4i0BtC8wwQ4F8J?eAAPWAaNUPCUO88AwnoRBX1h9AFrnRAylAAA9gA8hlR4h0y?wB8R4Atg0RpD8glBtg0RpwwC8glAtF8JeAAPWAv3ntCse88?AwnoRBWl+UBFrnRAylAAA9gA8BtR4wwg0ilB8R4ywglD8zh?i0C8BtF8JeAAPWAp+TWCqn88AwnoRBUFELBFrnRAylAAA9g?A8BtR4RpilB8i0RpglD8R4g0zhC8BtF8JeAAPWAJn/VCzn8?8AwnoRBUFELBFrnRAylAAA9gA8i0BtQ4ywB8zhR4D8ilBtQ?4wwC8glg0F8JeAAPWAMdNFD0P88AwnoRBTVO6AFrnRAylAA?A9gA8i0ywAtR4B8zhBtD8ilwwAtR4C8glg0F8JeAAPWAsnl?tC0P88AwnoRBTVO6AFrnRAylAAA9gA8ywRpg0ilB8Q4zhgl?D8R4Rpi0C8wwQ4F8JeAAPWAT+TPCve88AwnoRBTVO6AFrnR?AylAAA9gA8Bti0Q4ywB8ilg0R4D8glzhQ4wwC8BtF8JeAAP?WAJNUPC0n88AwnoRBTlOOBFrnRAylAAA 24 minimal solutions].

Below are the 8 most common solutions.

Perfect Clear after 7 lines
After a first bag T-Spin Triple, if a second garbage line was received, there may be a chance of a PC.


 * 4th Column Garbage: 11.11% PC rate, 1 minimal solution


 * 5th Column Garbage: 5.71% PC rate, 1 minimal solution


 * 6th Column Garbage: 11.59% PC rate, 1 minimal solution


 * 7th Column Garbage: 6.71% PC rate, 2 minimal solutions


 * 9th Column Garbage: 12.14% PC rate, 4 minimal solutions

LST stacking
LST stacking can be done on the right side of the board.

King Crimson
A King Crimson can be made with or without the first bag T-Spin Triple.

Perfect Clear after 7 lines
After a first bag T-Spin Triple, if a second garbage line was received, there may be a chance of a PC.


 * 1st Column Garbage: 18.57% PC rate, 3 minimal solutions


 * 4th Column Garbage: 20.83% PC rate, 4 minimal solutions


 * 5th Column Garbage: 20.63% PC rate, 3 minimal solutions


 * 6th Column Garbage: 20.52% PC rate, 2 minimal solutions

City Skyline Variation
This variation is considered highly redundant due to having the same dependencies as the Flat Variation. It is highly recommended to use that variation instead.

Perfect Clear after 7 lines
After a first bag T-Spin Triple, if a second garbage line was received, there may be a chance of a PC.


 * 7th Column Garbage: 21.19% PC rate, 4 minimal solutions