Sort:  

Must be then
Rb8-b3+ , Ka4
Qd7+ mate

No, Qd7+ is not checkmate (white bishop). :-)

Q takes B mate

Sure, but then that is not the fastest checkmate. :)

I like the variability of your different chess problems. This time the underpromotion of a pawn into a knight decides the battle.

Coin Marketplace

STEEM 0.18
TRX 0.16
JST 0.029
BTC 62847.35
ETH 2464.17
USDT 1.00
SBD 2.64