White to Play and NOT Mate

Originally posted by THUDandBLUNDER
The stip said how would you 'let' her win, not how would you 'force' her to win. Why the 'confusion'?

Because, if your boss was so bad a player that she reached a position where you almost have to mate her by force (😉), then you'd have to force her to win in order to get the game over. 😵

Originally posted by Mephisto2
To make up for the confusion, here a true selfmate puzzle. White plays and forces black to checkmate him in 6 moves.

[fen]Q7/8/8/8/3pNNp1/8/3p3p/3K3k/ w[/fen]

nobody to try this?

Originally posted by Mephisto2
nobody to try this?

Actually, I did try it, but got no solution.

My computer didn't either.

Is the diagram and stipulation correct?

Originally posted by BigDoggProblem
Actually, I [b]did try it, but got no solution.

My computer didn't either.

Is the diagram and stipulation correct?[/b]

1.Ng3+ Kg1 2.Qh1+ Kf2 3.Ne4+ Ke3 4.Nd5+ Kd3 5.Nd6 g3 all black's moves are forced so far. And now 6.Qg2 and if

6. ... h1Q 7.Qf1+ Qxf1#

6. ... h1R 7.Qf1+ Rxf1#

6. ... h1N 7.Qh3+ Nf2#

6. ... h1B 7.Qf3+ Bxf3#

Originally posted by Mephisto2
1.Ng3+ Kg1 2.Qh1+ Kf2 3.Ne4+ Ke3 4.Nd5+ Kd3 5.Nd6 g3 all black's moves are forced so far. And now 6.Qg2 and if

6. ... h1Q 7.Qf1+ Qxf1#

6. ... h1R 7.Qf1+ Rxf1#

6. ... h1N 7.Qh3+ Nf2#

6. ... h1B 7.Qf3+ Bxf3#

'6. ... h1N 7.Qh3+ Nf2#'
How is Qh3 check?

Is this meant to be ... h1N 7.Qf2 Nxf2# ?
But then it is not forced...g2

But who would be dumb enough not to take the queen?

Originally posted by phgao
'6. ... h1N 7.Qh3+ Nf2#'
How is Qh3 check?

Is this meant to be ... h1N 7.Qf2 Nxf2# ?
But then it is not forced...g2

But who would be dumb enough not to take the queen?

Sorry, you are right. 6. ... h1N 7.Qh3 is not check. But 7. ... Nf2# is the only move for black. He has no choice but to give checkmate.

Originally posted by Mephisto2
1.Ng3+ Kg1 2.Qh1+ Kf2 3.Ne4+ Ke3 4.Nd5+ Kd3 5.Nd6 g3 all black's moves are forced so far. And now 6.Qg2 and if

6. ... h1Q 7.Qf1+ Qxf1#

6. ... h1R 7.Qf1+ Rxf1#

6. ... h1N 7.Qh3+ Nf2#

6. ... h1B 7.Qf3+ Bxf3#

Ahh, that's why nobody solved it. The stipulation was erroneously given as s#6 when it should have been s#7.

Originally posted by BigDoggProblem
Ahh, that's why nobody solved it. The stipulation was erroneously given as s#6 when it should have been s#7.

You are absolutely right, my apologies for that. I was fixated on the 6th move because there is the only 'choice' black has.