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Let's see if black has a good way to prevent Black can try So, it seems that plan doesn't quite work. However, white has another way to deliver mate:


Due to the 6, we can place the following few pieces: After a little bit of trial and error from here, I found the solution: 4 is attacked by: 6 is attacked by all but



Having seen the clarification in the comments of the OP, it would seem that:


This may not be the intended solution, but it does follow all the instructions:


Answer Mate in 4 moves: Answer for the cryptarithm: That is, using the FEN notation, The third part means:


Hopefully I understood the rules correctly. Assuming white does not have to play optimally, I was able to leave no legal moves for white after 5 moves:


Actually The key to the solution is So,


Representation of 5 types of pieces by its suit was well distributed for dragon Kings, wind Queens,wan Rooks, wheel Knights and bamboo Bishops. The 9 sets by Daniel Choi is shown below with pawns as blanks. Other possible representation of 6 pieces is by positioning of tiles as noted by Justhalf and applying the faced down pawns above, the regular set looks ...


First, each Mahjong set contains the following 146 pieces: 4 each of Bamboo tiles numbered 1-9 (e.g., 4 Bamboos with a 1, 4 Bamboos with a 2, etc.) 4 each of Wheel tiles numbered 1-9 4 each of Wan tiles numbered 1-9 4 each of Wind tiles labeled E, W, S, and N (e.g., 4 East, 4 West, etc.) 4 each of Dragon tiles labeled C, F, and P 1 each of Flower tiles ...


The original problem Although there is an existing solution, it's a bit chaotic-looking to my eye, and lacks explanation of how it was created. I'd like to show a more regular solution, observe that in some sense there are no choices to be made when solving this puzzle, and also consider boards of other sizes. First, since Thus, we're trying to cover ...

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