Cool Chess Problem

White to move and force mate. will post solution tomorrow.

1. Qc3 Kb1 2. Qd3+ Ka1 3. Qd4 Kb1 4. Qe4+ Ka1 ... 10. Qh7+ Ka1 11. Qh8 Kb1 12. Qh1#. All Black's moves are forced.

Kc2, black force move b1 then 0-0 (Qbi)...bingo! check & mate

1. Kc2? b1=Q 2. Qxb1 axb1=Q! and White is losing.

In my opinion chaotic_iak made exact sequence. Really nice puzzle,i love it. I hope that Endgamestudy can still publish studies like this,they are amazing!

You can also play, 

1.Kc2 b1=N 2. Qb2#

lol, b1 promotes to queen and from a loss it wins!

If Black, promotes it to a knight, white wins.

Since it's an endgame study, you should assume best play by Black. Which in this case is to promote to queen, not knight.

Unless he's an engine, black can make a blunder...

Positions like these usually never arise in a real game anyway.

white. black K b2 b2=Q Q×Q++

white. black K b2 b2=Q Q×Q++

merci d'avance Une

The board is turned the other way.