.....when you joined the ‘A’ and the ‘B’ you get another picture.
I have come up with an ‘A’ and ‘B’ type of chess problem.
Move the pieces on the h-file to the e-file and move what is on the a-file to the c-file and what is on the b-files to the d-file and then solve the mate in 3. (do not worry this will not be a regular feature.)
Clue
This is a naff idea, just jump to the solution.
You should have had this position in your mind but do not worry if you couldn’t because I’ll be tossing this idea into my overflowing mad ideas dustbin. The solution is; 1.Ba5 d2 2.Kd8 d1=any 3.Bc7 mate.
Here is a genuine puzzle composed by Alexander Petrov.
White to play and win.
Watch out for stalemate. 1.Rd7+ Ka8! 2.Rxe7 Stalemate.
Think of that German word that means up the creek with no paddle.
Another clue:
You need sacrifice one of the Rooks.
Header
FEN
2K5/k3q3/6pR/6p1/6Pp/7P/8/3R4 w - - 0 1
PGN
[FEN "2K5/k3q3/6pR/6p1/6Pp/7P/8/3R4 w - - 0 1"] 1. Rh7 {1...Ka8 going for a stalemate gets checkmated with 2.Ra1+ Black has to take the Rook.} 1... Qxh7 2. Rd7+ {If 2...Qxd7 3.Kxd7 the White King gets into the Kingside pawns and wins.} 2... Ka8 {Black had to rely on the stalemate defence.} 3. Kc7 {3...Qh8 4.Rd8+ and again the ending is easily won for White.} 3... Qh6 {This is the only move to avoid an immediate loss.} 4. Rd8+ Ka7 5. Kc6 {1-0. Black is move bound. 5....Qh7 6.Rd7+ there is no stalemate and 5...Ka6 6.Ra8 mate.}
The term ‘move bound’ instead of ‘zugzwang’ came from the chess playing lawyer, Gerald Abrahams. And in time honoured fashion, two examples of a RxQ Stalemate.
bohemia51 - spartangreek RHP .2018 (White to play)
The simplest way was 65.Qf1+ but White played 65.Rxe1 stalemate.
I have been watching the Candidates to find the next challenger for Ding Liren. Some smashing games and all seem to agreed that this is because there is no increment on move one. The first increment comes in on move 41 (30 seconds.)
Your 17th piece, the chess clock.
I’m not fond of the 30 second increment from move one that you see in other events. In quite a few well known lines to the players can bang out 20 moves from memory and have 10 more minutes on the their clock that what they started with. It is farcical.. Games have finished with one player having more time left than what they started with.
But enough of me ranting raving. I have a mystery tour from the Candidates for you.
H. Nakamura - I. Nepomniachtchi, RD.7 Candidates Toronto2024
Header
FEN
rn3rk1/1pbq1ppp/2p1b3/p1Pp4/3Pn3/1Q1B1NP1/PP1N1P1P/R1B1R1K1 w - - 0 14
PGN
[FEN "rn3rk1/1pbq1ppp/2p1b3/p1Pp4/3Pn3/1Q1B1NP1/PP1N1P1P/R1B1R1K1 w - - 0 14"] 14. Qxb7 {Nakamura grabbed what looks like a hot because of this move....} 14... Nxf2 {...and if Kxf2 Bxg3+ wins the Queen. Now Black is threatening Nxd3.} 15. Bxh7+ {White sacs the Bishop and next move he has...} 15... Kxh7 16. Qxa8 {...he has won the exchange and is a pawn up. But it is going to get messy.} 16... Nh3+ 17. Kg2 Bg4 18. Qb7 {Nakamura has to get the Queen back into the game.} 18... Re8 {White now played Qb3 and the game was drawn. We look at;} 19. Ne5 {Seems plausible and off we go with a 'come fly with me variation.'} 19... Qf5 20. Rf1 {Looks OK. but Black has a Queen sac.} 20... Rxe5 21. Rxf5 Rxf5 {To stop Rf2+ White can play 9. Ne4 dxe4 10.Be3. But we go with...} 22. Qxc7 {...to show a neat checkmate,} 22... Rf2+ 23. Kh1 Rf1+ 24. Nxf1 Bf3 {Checkmate.}
Next that mating pattern in use on RHP. White is losing but does not give up hope.
Sadashiv Pawanekar 2 - The Cosmic Muffin RHP 2022
Header
FEN
r3qrk1/1p3p1p/2p2np1/2b1NN2/2P2B2/6Q1/PP3nPP/5K1R w - - 0 1
PGN
[FEN "r3qrk1/1p3p1p/2p2np1/2b1NN2/2P2B2/6Q1/PP3nPP/5K1R w - - 0 1"] 1. Bg5 {White sets up the mating idea. 1...Qe6 or 1...Ne5 are good replies.} 1... Nxh1 {Black has thrown away the win, now it is a draw.} 2. Nh6+ {2...Kg7 3.Nf5+ Kg8 etc is a perpetual check.} 2... Kh8 {Black has thrown away the draw, now it is a loss.} 3. Bxf6 {Checkmate.}
Finally from an OTB game, Rainer Gruenberg - Jeno Doery, 1984.
Header
FEN
r5k1/p2p2pp/bp2p3/1N1nn3/P7/5qP1/1P1QNP1P/R4RK1 w - - 0 1
PGN
[FEN "r5k1/p2p2pp/bp2p3/1N1nn3/P7/5qP1/1P1QNP1P/R4RK1 w - - 0 1"] 1. Ned4 {Black ignored the attack their Queen and plays...} 1... Bb7 {White sees 2.Nxf3 Nxf3+ losses a piece so plays....} 2. Qd1 {And Black now plays what White had obviously missed.} 2... Qg2+ {Remember this idea.} 3. Kxg2 Nf4+ {Double Check.} 4. Kg1 {Only move,} 4... Nh3 {Checkmate.}