White checkmate in two?! extremely hard.

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grandmastersoto

White to move, checkmate in two moves. i cannot figure this puzzle out. and do not have sufficient means to use a computer to solve. please help!

i have tried this puzzle for weeks and cannot figure it out

grandmastersoto

i know i failed at posting this, but its my first time posting anything. just post the move orders and it would help out alot.

TheOldReb

1 Qa8 Rh1  Qg2# 1... g3  2 Qb1 #  1... Qxh8 2 Qxh8 #

TheOldReb

If Q moves in the h file but doesnt take the rook then RxQ will be mate 

johnmartin

I think the solution is 1.Qa8

If  1...QxR then 2.QxQ#

If 1... Rh1, then 2.Qg2#

if 1...Rg2 then 2.Qxg2#

if 1...g3 thewn 2,Qc8#

grandmastersoto

thanks guys!!!!!

TomBarrister

1 Qa8 doesn't create any threats by itself. If White were to move again, there would be no mate in one.  The move puts Black in Zugzwang and covers the possibility of the Queen capturing the Rook.  It's the only move that accomplishes both purposes, which makes it unique.  In fact, White has no immediate mate with any other move, although obviously moves like Rxh4+ win easily.

grandmastersoto
TomBarrister wrote:

1 Qa8 doesn't create any threats by itself. If White were to move again, there would be no mate in one.  The move puts Black in Zugzwang and covers the possibility of the Queen capturing the Rook.  It's the only move that accomplishes both purposes, which makes it unique.  In fact, White has no immediate mate with any other move, although obviously moves like Rxh4+ win easily.


yes. thats what confused me, is that white has no immediate means of checkmating other than a "defensive" move like Qa8 thanks for your comment!

matr1x

yea...helps a lot, Thanks

joseph_ward
AndyClifton

But you've already said the whole game is obvious.

APNambo

Queen to g1 (capture bishop) is the correct move.  Then its mate in so many ways and black cannot stop it.

Rumpuss
APNambo wrote:

Queen to g1 (capture bishop) is the correct move.  Then its mate in so many ways and black cannot stop it.

1.Qxg1 g3 and there's no mate in 2.