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5
votes
1answer
55 views

Online resources for medieval Persian chess games or puzzles?

I am looking for any collection of chess games of al-Suli or anyone medieval scholar's composition of games. Any resources would be appreciated.
8
votes
2answers
71 views

Why was 49…Rb4+ played in this puzzle?

I was looking at the answer of today's puzzle in chessgames and see that the reason I wasn't able to solve it because I missed a key move in the solution: Black played 49...Rb4+ note: this is not the ...
6
votes
1answer
89 views

Self-Solving Chess Problems

Are there any longer "problems" like this, which is white to move and mate in 6? (Namely, where one is actually forced to achieve the "goal".)
8
votes
1answer
110 views

Mate in N. What is the largest N known?

What known position has one side with a forced mate in N moves, with N the largest? I came across one with 517 moves using only 7 pieces, so there should be much be larger. (Ignoring the 50-move ...
11
votes
1answer
183 views

How many such positions are there? (chess/math checkmate puzzle)

I'm interested in this kind of position: There are only 4 pieces on the board. If Whites goes first, they can checkmate in one move. If Blacks goes first, they can checkmate in one move. For example: ...