The Dueling Pistols by Ilya Repin (1899) at the State Historical Museum, Moscow

Current mystery starts story of opposition of Sherlock Holmes and Professor Moriarty at the latest London MCR Championship. Key deals and techniques will be highligted and discussed.

Before the last deal of the first session Moriarty leads 80 game points. The deals starts but with only three minutes left until the end of the session. Moriarty (East) picks up an impossible starting hand: . Other days it is perfect to try even "Nine Gates" but this time the only priority is to finish the hand safely in three minutes. He discards . After South's move West discards some Dot tile (Moriarty cannot pung it) and Holmes (North) declares Chow discarding . Professor takes  and after discarding Bamboo the hand has already a 3-sided wait: for  and . Once again after South moves West discards another Dot tile (not for Moriarty's wait), Holmes declares Chow discarding . One minute has left to the end of session.

Now, an incredible thing has happened: the wind blows open the windows and overturns five of Holmes' tiles exposing  with only two tiles left unexposed. Moriarty takes . He understands that no matter how the exposed tiles are to be treated -- intentionally or unintentionally exposed -- he has to make a discard. Despite this, he has the option to throw as many as nine different tiles, yet all nine of those tiles could be dangerous to discard and possibly costly should he deal in to a mahjong in Sherlock's hand. Whenever there is a space for a guess, even a mastermind can guess wrong. Moriarty discards a tile.

"Hu," declares Holmes. "Pure Shifted Chows -- 16 points, Half Flush -- 6 points, Seat Wind -- 2 points, Prevalent Wind -- 2 points. 16+6+2+2=26 points in total."

Holmes has won the session with only 2 point lead.

Note: Moriarty could observe two exposed Chows in Holmes hand. For instance, for  and  dangerous discards potentially giving 16-points fan would be  or  (yielding "link"-Chow  for completing high-scoring fan). Moriarty lost because two Chows made potentially dangerous to discard all nine tiles in Moriarty's hand.

Question (): Please, provide two melded Chows of Sherlock's hand which made potentially dangerous to discard all nine tiles in Moriarty's hand. In other words, any of tiles  or  can be used in Chow which creates with two exposed Chows 16-points fan "Pure Shifted Chows".