CHÂTEAUpener

The CHÂTEAUpener is a TSS>TSD>TSD>TST opener that have a high Perfect clear chance. It was created by YackTenebreux. It's important to note that, even if it can be done without 180° rotations, it can be built more often with this feature.

1st bag
The 1st Bag is the same as SingleYou.

2nd Bag
This shape can always be built.

3rd Bag
This setup is called Magic Key (rarely use in our days). LJ placement needs to be ajusted according to the queue.

If you are high in your board and you need to downstack, you can just take a T-spin Triple :

4th Bag
If you can't make the box with the S piece, just use the O. If you can't do either of them, you can freestyle, it's not hard.

14 lines Perfect clear
This field has a 99.80% perfect clear rate. This solution is the most common one, but you can find the rest of them in this fumen [https://fumen.zui.jp/?v115@pgB8i0wwzhB8R4g0xwD8R4RpwwF8glRpG8glBtG8hl?BtD8JeAgWcA1y78Ajx78AwngHBFbcRAzB88AQXMgCzeNPCp?gB8g0RpwwzhB8g0RpxwD8h0AtglwwF8BtglG8AtR4G8R4hl?D8JeAAPcAzs78ADt78AwngHBFbcRAzB88AwsjWCUn3LCpgB?8g0RpwwzhB8i0xwD8hlRpwwF8glBtG8glR4G8R4BtD8JeAA?PcAzs78ADt78AwngHBFbcRAzB88AwMUFD0vCMCpgB8g0Rpw?wzhB8i0xwD8hlRpwwF8glR4G8glBtG8R4BtD8JeAAPcATr7?8Aj078AwngHBFbcRAzB88AQXstC0vCMCpgB8g0R4wwzhB8i?0xwD8hlRpwwF8glRpG8glBtG8R4BtD8JeAAPcATr78Aj078?AwngHBFbcRAzB88AQXMgC0vLMCpgB8g0BtwwzhB8i0xwD8h?lRpwwF8glRpG8glR4G8R4BtD8JeAAPcATr78Aj078AwngHB?FbcRAzB88AwMMgC0fbMCpgB8i0wwzhB8R4g0xwD8R4BtwwF?8glRpG8glRpG8hlBtD8JeAAPcAzp78AD278AwngHBFbcRAz?B88AQyaFDzeNPCpgB8g0RpwwzhB8g0RpxwD8h0R4wwF8ilG?8glBtG8R4BtD8JeAAPcAS078AD278AwngHBFbcRAzB88AQX?stCUn3LCpgB8g0RpwwzhB8g0RpxwD8h0BtwwF8ilG8glR4G?8R4BtD8JeAAPcAS078AD278AwngHBFbcRAzB88AwMUFDUn3?LCpgB8RpBtzhB8RpQ4BtD8i0R4F8glg0wwG8glxwG8hlwwQ?4D8JeAAPcAyy78Aj078AwngHBFbcRAzB88AQCmPCzHDMCpg?B8Rpg0wwzhB8Rpg0xwD8hlh0wwF8glR4G8glBtG8R4BtD8J?eAAPcAys78ADt78AwngHBFbcRAzB88AQXstCUn3LCpgB8Rp?g0wwzhB8Rpg0xwD8hlh0wwF8glBtG8glR4G8R4BtD8JeAAP?cAys78ADt78AwngHBFbcRAzB88AwMUFDUn3LCpgB8g0Btww?zhB8g0hlxwD8h0R4wwF8R4glG8RpglG8RpBtD8JeAAPcASr?78Ajr78AwngHBFbcRAzB88Aw2TxCqibMCpgB8hlBtzhB8ww?glQ4BtD8xwglR4F8Rpg0G8Rpg0G8wwh0Q4D8JeAAPcASo78?Ajo78AwngHBFbcRAzB88AQvytC0X8LCpgB8g0Q4glwwzhB8?i0xwD8BtR4wwF8BtQ4G8RpglG8RphlD8JeAAPcAR078AD27?8AwngHBFbcRAzB88AwmjxCKN8LCpgB8hlBtzhB8wwglQ4Bt?D8xwglR4F8wwRpG8g0RpG8i0Q4D8JeAAPcAR078ADt78Awn?gHBFbcRAzB88AQvKxCzX8LCpgB8g0wwBtzhB8g0xwBtD8h0?wwRpF8ilG8glR4G8R4RpD8JeAAPcAxy78Aj078AwngHBFbc?RAzB88AwMMgC6u3LCpgB8BtR4zhB8wwBth0D8xwR4g0F8ww?hlG8RpglG8Rpglg0D8JeAAPcARx78ADz78AwngHBFbcRAzB?88AwGExCqHMMCpgB8RpR4zhB8Rpwwh0D8Btxwg0F8BtwwG8?ilG8glR4g0D8JeAAPcAxv78Ajx78AwngHBFbcRAzB88AQij?xCK3LMCpgB8RpBtzhB8RpQ4BtD8hlwwR4F8glxwG8i0G8gl?wwg0Q4D8JeAAPcAxs78ADt78AwngHBFbcRAzB88AQ/DxCzH?DMCpgB8RpBtzhB8RpQ4BtD8i0R4F8wwhlG8xwglG8wwg0gl?Q4D8JeAAPcAxs78ADt78AwngHBFbcRAzB88AQOstCqHDMCp?gB8R4glwwzhB8ilxwD8R4BtwwF8i0G8Rpg0G8RpBtD8JeAA?PcAxp78Aju78AwngHBFbcRAzB88AwmPFD0yLMCpgB8Q4hlw?wzhB8R4glxwD8BtQ4h0F8Btg0G8Rpg0G8RpglwwD8JeAAPc?Axp78ADq78AwngHBFbcRAzB88AwmPFDzO8LCpgB8BtR4zhB?8wwR4h0D8xwBtg0F8ilG8glRpG8wwRpg0D8JeAAPbA4nw2B?5no2AFrnRASoTABBoo2Avi/wCzndBApgB8BtR4zhB8wwBth?0D8xwR4g0F8ilG8glRpG8wwRpg0D8JeAAPbA4nw2B5no2AF?rnRASoTABBoo2Avi/wCaddBApgB8RpBtzhB8wwglQ4BtD8x?wglR4F8wwhlG8i0G8Rpg0Q4D8JeAAPbA4nw2B5no2AFrnRA?SoTABBoo2AqC+tCaXdBApgB8h0AtwwzhB8g0BtxwD8hlAtR?4F8glR4G8glRpG8g0RpwwD8JeAAPbAznw2B4no2AFrnRASo?TABBoo2APNUFD0PdBA].

Others continuations
Some ideas to continue :