2017-05-25Puzzle

If you haven't read "How to move pieces in Japanese Chess", or,
"How to play Checkmate Puzzles inJapanese Chess", go to the web site and read then you will be able to play Checkmate Puzzles!

Question

Answer

▲23銀成△31玉▲32成銀or32角成

If you don't promote 銀 at 23, 玉 will run away 13. (Then you can checkmate, if you promote 銀 at 14, but too long for Checkmate Puzzles)
Of course, you should promote your piece when 3 moves have done. If not, opponent 玉 will survive at 42 point.