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NajdorfDefense unfortunately the hypermodern puzzle has numerous winning alternative lines.
Thankyou thomas0115 96th puzzle http://www.chess.com/tactics/server.html?id=308285
Thankyou nick4567, 97th puzzle http://www.chess.com/tactics/server.html?id=376139
a blunder by black , its a trick one because diagonal retreats are hard to see for humans
this one is a nice knight fork it has a few variants but they are all the same. black wins a piece or material.
I made something like this for the en passant poll. Some people don't know the rule, and some people seem to think it doesn't work if that pawn checks the king. For people who don't know the en passant rule, they'd think you have to capture with the rook, but with it one can save the rook and possibly win the game. It'd be good for a low level puzzle. I'm not sure about the king's move, someone far more advanced might see something better than 2. Kf5. Of course, white's first move isn't tactically sound, but, at my level, people do stuff like this without considering ep.
TonyH, thankyou , 98th puzzle http://www.chess.com/tactics/server.html?id=425833
Thankyou for starting the second diagram with a computer move. Unfortunately the problem is ambiguous with Qd4 also winning.
99th puzzle http://www.chess.com/tactics/server.html?id=297857
ClavierCavalier, thankyou for the 100th puzzle (moves altered slightly to prevent ambiguity)
Okay, I guess I don't understand the difference btw that Mate in 3, and all the other Mates in 3 on TT where there are alternative winning lines.
I've personally failed many TTs when I went for a mate that took a move longer, are all those being taken out of the system? I'm honestly confused here.
forced mate in 7
@CS I don't think Bb4+ should be included, as the black king has 2 moves.
yeah you are right metaknight nice name btw
@ everling you should add a few more pieces, because the way you have it makes it way to obvious.
Oh man, I meant to include a black bishop on f8 so the pawn would be protected and it'd be roughly even material. It's still a nice little en passant thing, even though black will probably lose. If it's not too late to change it:
Computer plays Qb1??. Black plays Rxf3.
White plays Nxf3 and black plays Qxf2#.
EDIT: Just checked this with Rybka. It is solid.
seems a nice mate in 3 at the end
NajdorfDefense, as explained several times already in this thread, I’m looking for beautiful, instructive, highly unambiguous puzzles. I’ve not started the thread to discuss existing TT problems, and I have written my personal requirements for puzzles in the first post.
ChristianSoldier, unfortunately there are alternative winning lines throughout the puzzle. It is however, a nice mate that I enjoyed working through.
Everling10, unfortunately there are already many puzzles using this classical sequence in TT, so although it is unambiguous I’ve not added it, to avoid further duplication. As nate23 said, it is also a little artificial without more pieces.
ClavierCavalier, alterations made. Interestingly even without the bishop Houdini gave black a slight advantage.
nick4567, well done for recognizing the absence of alternative winning lines. Unfortunately I'm also looking for puzzles where the difference between the best and second best move at each step is ideally at least 2.5. White can also maintain equality with a different last move :
I hoped there would be a puzzle from the line if white tries to save his knight, but unfortunately there are many advantageous alternative moves.
Thankyou Metaknight251, I’ve chosen a different contination requiring a ‘look before you leap’ approach for black. 101st puzzle http://www.chess.com/tactics/server.html?id=417603
Thankyou vipera_raddei, I added an extra rook to remove alternative winning lines.
102nd puzzle http://www.chess.com/tactics/server.html?id=457427
Asorski, black to move : c1=Q (-10) or Kc3 (-1.75) provide two advantageous lines.
I hope I didn't take up too much of your time by asking a question in an attempt to understand the process, if so my sincerest apologies.
Nobody was starting a debate over old TTs, merely trying to clear up my own confusion about what you meant by 'ambiguous' in a forced mate scenario.
I'm sure your instructions are 100% crystal clear to the rest of thread.
Congrats on your fine work improving TT.
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