Dead Reckoning DR is simply a recognition of the impact to compositions of the "dead position" rule, and had been controversial since its inception in It came with significant creative potential particularly for retrograde analysis but also rendered certain pre-existing problems unsound. The new Article 17A removes this controversy by stating that by default the dead position rule applies only to retrograde analysis compositions. A few non-retro DR compositions are negatively impacted by the new convention, but most DR problems are retros, so personally I felt it was a sacrifice worth making for what is a big endorsement of DR.
I am very grateful to the wonderful chess composition community for welcoming this trouble-making "independent spirit" to their fold. Over the last few years, I've chosen to spend chess time helping to maintain the content of the community's PDB Chess Problem Database , rather than updating my own chess website here. PDB is a free, easy-to-use source of over , compositions, vital for composers seeking inspiration, or wanting to survey prior art. However, I'll maintain and extend the content on my own website from time to time.
Thanks for coming here. In , I discovered that I love designing retrograde analysis chess problems "retros". Problem 3 is an example. Its key 1. The king has four diagonal moves, and all result in different mates — this is the star-flights theme. Qg6 , 1…Kh4 2.
Qh5 , 1…Kf6 2. Qe7 , and 1…Kf4 2. Note that the white queen initially controls h6, h4, and f6, so the generous key grants three flight-squares to the black king. Problem 4 is also solved by a waiting key, 1.
Qf1 , 1…Sd3 2. Qxd3 , 1…a5 2. Qb5 , 1…b5 2. Qc5 , 1…c2 2. Qxc2 , 1…Bf7 2. Qxf7 , 1…Be6 2.
Qxe6 , 1…Bd5 2. Qxd5 , 1…Rg4 2. Qxg4 , 1…Rf4 2. Qxf4 , 1…Re4 2.
These twelve variations with distinct queen mates represent a record for two-move problems. Rd4 and 1…Bc7 2. Problem 5 has rich play that involves pinning and unpinning effects. The white queen has its black counterpart pinned, and the latter in turn pins the white bishop, which could otherwise mate on d4 or g5. The key is 1. Every move by the black queen defeats the threat, but also unpins the white bishop, hence 1…Qxe7 2.
Bd4 and 1…Qe5 2. But this defence permits 2. Rg3 , because the pinned queen has also interfered with the black bishop on the long diagonal. Two further thematic variations are 1…d6 2. Qa7 and 1…d5 2. In this position, with the WB on h8, Black has no last move! But we still have a mate in one with black to move Kxh1 2.
Kf2 Kh2 3. Rh4 , and if not, White castles 1.
Kxg3 2. Kh4 2. Ke1 g4 4.
Vladimir Nabokov’s 18 chess problems - Aleph
Solution No! Black cannot castle here as he has to have moved either the king or rook on his last move. Mate in eight may sound difficult, but with so few pieces, think of it as endgame mating practice. What move would you play over-the-board? Kd8 2. Kd6 Ke8 3. Qxh8 Kg6 5.
Ke5 Kg5 6. Qg7 Kh4 7.
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Kf4 Kh3 8. Qg3 being one of the variations. Solution The answer is yes! Black's last move could have been Thus, a key that would not be considered acceptable in a "normal" chess problem is OK here since the idea is to show both Black castlings: 1. Qb7 ; if 1. The United States Chess Federation. Amateur East Champs. K-Factor changes in Rating System. Click Here! Username Password Remember me Lost Password?
No web account yet? Site Registration. All rights reserved. By Dr. Steven B. Dowd continues his thrilling two part series on Unusual Chess Problems.
Dear chess professional, amateur!
Check out the first installment if you missed it and enjoy the problems for solving or just for pleasure. For those who think chess is played out, or that there are no new problems to composer, the development of thousands of possibilities in stipulation from such a simple position should show them to be very wrong. Whose move is it? That is for you to find out and the most important part of the problem! Show Solution Solution The answer is Black, as he has no last move. Hide Solution Bror Larsson's addition here in feenschach was to state: Retract one white move and mate in one.
There is only one answer! This one I definitely think you should try to solve. There is only one move by White that could work and then allow a mate in one. Show Solution Solution White retracts his last move 1. Hide Solution Promotions Promoting a piece to one that existed in the start position is unique to chess. One can promote a checker piece to a king, but that is a new piece that didn't exist before on the board.
Chess is said to have three such unique possibilities that other games lack - promotion, en passant, and castling.