# To Win The Right To ****************

I found this nice little problem on Tim Krabbe's website the other day. I found it so unique and beautiful, that I felt compelled to share it here as a puzzle to be solved. Please do not use a computer and do please don't look up the answer! Try to use your own brain power!

It's White to move and reach a winning postion in 7 moves.

Gady Costeff (Israel), 3rd Place, World Chess Composition Tournament, 2003

• I'm fairly new to chess puzzles - is the idea here to make moves as white and assume black will make the best possible move? I've done puzzles where you can force a set of moves by keeping the opponent in check but that doesn't seem possible here. – scatter Jun 20 '19 at 13:47
• Then welcome to puzzling scatter! And you are correct-assume that Black plays best. – Rewan Demontay Jun 20 '19 at 13:50
• I assume it is more than one move – Moti Jun 20 '19 at 17:20
• It looks like White can't put Black in check here, let alone checkmate. So yes, it has to be more than one move. However, if White is to win, then all of White's moves must force Black's moves by threatening checkmate. – RShields Jun 20 '19 at 17:58
• Yes, it is more than one move. And it doesn't necessarily have to be a checkmate threat. The title is a hint. – Rewan Demontay Jun 20 '19 at 18:06

Another attempt based on OP comments: "From your new 7-move solution, the first full four moves are entirely correct. Reconsider White's 5th move-that is your first one of your edit."

1. Qa4 Rxf3 2. Qa6+ Qxa6 3. bxa6+ Ka8 4. Ba3 Rxb1+ 5. Bc1 Rb8 6. Bb2 Rbf8 7. 0-0-0 ..

From the title To Win The Right To **************** I think the asterisks refer to queenside castling which means the title was actually To Win The Right To Castle, which gave white safety from being threatened to be mated and the advantage in the following moves.

From OP clarification: "I mean to say that by White to win I meant for White to reach a winning position. I also forgot to mention that the solution is 7 moves long The title is a bit of hint as to what the solution has."

Possibly the solution was as Sconibulus answer suggests with elaboration assuming black plays suboptimal moves:

1. Qa4 Rh5 2. Qa6+ Qxa6 3. bxa6+ Kxa6 4. Kf2 Rh1 5. Nc3 Rh8 6. Bb2 Rxa1 7. Bxa1 Rxh7 .. then white would have advantages.

From OP comment: "White has....ways to avoid a stalemate, and capturing White's rook would not benefit Black at all. " add variant:

1. Qa4 Rxf3 2. Qa6+ Qxa6 3. bxa6+ Ka8 4. Ba3 Rxb1+ 5. Rxb1 Rf1+ 6. Kxf1 then stalemate since black can't move

Considering black always play the best move:

White won't be able to win.

Prove:

Most of the white move would be a big disadvantage since no way out of mate from black without sacrificing a lot.
Variant:
a) 1. Qb3 Qd6 2. Qg8 Qh2 hardly any chance for white to win left.
b) 1. Qb3 Qd6 2. exf5 Qg3+ either mate or draw from repetition moves.
c) 1. Ba3 Qb6 no way out of this mate.
Other variant doesn't seem to do anything better to solve the stalemate.

But if black was able to play suboptimal moves:

White would be able to win.

One of possible variant:

1. Qb3 Qe5 2. Qxd3 Qxa1 3. exf5 Re8+ 4. Kf2 Qe5 5. Qd7+ Ka8 6. Qc6+ Kb8 7. Qxe8+ Qxe8 8. Bb2 Kc7 9. h8Q Qxb5 10. Be5+ Kd7 11. Qg7+ Ke8 12. Qg8+ Kd7 13. Qf7+ Kd8 14. Qc7+ Ke8 15. Qc8+ Ke7 16. f6+ Kf7 17. Qc7+ Ke6 18. Qe7+ Kf5 19. f7 Qb6+ 20. d4 Kg6 21. f8N+ Kh5 22. Qf7+ Kh4 23. Qf4+ Kh5 24. Qg4+ Kh6 25. Bf4#
Apronus PGN Viewer

Disclaimer: I used Droidfish to spar my move against, and tweak the move for black suboptimal moves and play normally for the rest.

• Have you considered base64(MS5RYTQgbG9va2luZyB0byBmb3JjZSBhIHRyYWRlIHdpdGggMi5RYTY=)? – RShields Jun 25 '19 at 14:01
• From your new 7-move solution, the first full four moves are entirely correct. Reconsider White's 5th move-that is your first one of your edit. – Rewan Demontay Jun 26 '19 at 3:31
• White has....ways to avoid a stalemate, and capturing White's rook would not benefit Black at all. – Rewan Demontay Jun 26 '19 at 3:38
• In your new solution, Black's 1st, 3rd, and the entire 4th move are incorrect. Everything else is correct however. Sorry that I called Black's first move correct in your previous solution and causing confusion for you. – Rewan Demontay Jul 1 '19 at 1:59
• ah, I copied the wrong 4 set move my bad. @RewanDemontay see update – Shinjo Jul 1 '19 at 2:00

I initially thought the answer was something like

1.Qa4, Rxf3||Rh5 (Rook has to move or it will be lost after Queen trade)
2.Qa6+, Qxa6
3.xa6+, K?? (Not sure if capturing the pawn or moving to a8 or c6 is better) 4.Ba3, (Start developing pieces, immediate threat is handled)

Given the poster's comment confirming the first four moves:

1. Qa4 Rxf3 2. Qa6+ Qxa6 3. bxa6+ Ka8 4. Ba3 Rxb1+

I believe the continuation is as follows, for the following reasons.

5. Bc1 Rb8 Black must prevent H8^Q
6. Bb2 Rh3 Still trying to prevent promotion
7. H8^Q bRxh8 White forces a trade 8. Bxh8 Rxh8 9. O-O-O if possible, anyway, white seems pretty far ahead at this point.