Vocabulary: kin=Gold, wa= as for, todome=a decisive blow, ni=for, nokose (imperative)=to leave, save
A Gold is a valuable piece in checkmate.
White in hand: nothing 9 8 7 6 5 4 3 2 1 +---------------------------+ | * * * * wK * * * * |a | * * * * * * * * * |b | * * * * * * * * * |c | * * * * * * * * * |d | * * * * * * * * * |e | * * * * * * * * * |f | * * * * * * * * * |g | * * * * * * * * * |h | * * * * * * * * * |i +---------------------------+ Black in hand: G S Diagram 1.How will you brinkmate White's King?
S*5c
Instead of using a Gold, you should narrow the King's escape by dropping a Silver first.
With nothing in hand, White cannot escape from mate. If K-4a or K-6a, a Gold dropped at the head of the King will finish the game.
If you drop a Gold instead of a Silver on 5c, there will follow: K-6a, S*6b, K-7b... You'll let the King escape.
Suppose you have no Golds in hand in Diagram 1, you will need three Silvers to finish:
S*5c K-4a S*3c Brinkmate -a(Diagram 2) White in hand: nothing 9 8 7 6 5 4 3 2 1 +---------------------------+ | * * * * * wK * * * |a | * * * * * * * * * |b | * * * * bS * bS * * |c | * * * * * * * * * |d | * * * * * * * * * |e | * * * * * * * * * |f | * * * * * * * * * |g | * * * * * * * * * |h | * * * * * * * * * |i +---------------------------+ Black in hand: S Diagram 2.Please remember, where there is no Gold available, it is not easy to get access to the King.
Lastly, the following diagram shows a tsume problem. This will pretty much recapitulate what I said above.
White in hand: 9 8 7 6 5 4 3 2 1 +---------------------------+ | * * * * * * bS * * |a | * * * * * * * * wK |b | * * * * * * * wP * |c | * * * * * * * * wP |d | * * * * * * * * * |e | * * * * * * * * * |f | * * * * * * * * * |g | * * * * * * * * * |h | * * * * * * * * * |i +---------------------------+ Black in hand: R G Diagram 3. A three-move tsume problem. Solution: R*1a, Kx1a, G*2b