Recently I found many Hamshogi Walkthrough Videos on Youtube. Here is the one beting Hamster in Naked King handicap.
This is the line from the start to the end with my comments.
1. ... K-4b 2.P-9f
*You advanced the left edge pawn. This is the preparation of moving your Bishop from 8h to 9g.
*Please confirm your Bishop goes to 3a now. The opponent's King is suddenly in danger.
*You advanced your Rook's pawn. It's generally importatnt to activate your Rook and Bishop well in shogi. Both are called Major Pieces.
*You advanced your Rook's pawn again. The pawn is supported by your Rook.
*You advanced your Rook's pawn third time. The pawn advancement supported by Rook is one of the basic tactics in shogi.
*Your Pawn got promoted on 2c. The promoted pawn can move to 7 squares as a Gold does while unpromoted one can move to one. In other words, a promoted pawn is as seven times capable as an unpromoted pawn. Making promoted pawn is one of the basic tactics in shogi.
*Checkmate. The promoted pawn is supported by your Rook on 2h. So the King cannot take it.
Here is the board for replaying the game move by move.