Just to add my 2 cents as to why triple check is impossible... usually one pice must move to uncover check by another piece, whilst also giving check itself (the except being the en passant shown earlier in this topic). It is im possible to give triple check as it would involve a piece moving, giving check, and uncovering 2 different checks, which is physically impossible, as it can only block one check path to a king.
Originally posted by CrawlIceWhat move did White play before ...g7-g5?
No, a discovered double check means both checks are uncovered with one move, as in the following setup:
[fen]R1BKQ2R/1PPPBPPP/2N2N2/4P3/Pp6/k1np4/p1pbpppp/3rqbnr[/fen]
After black plays g7-g5 to block the B's check, now pxp e.p. discovers a double check.
The board is not the actual game. I just reconstructed the situation.
Originally posted by bobbob1056thWell, if it's white to move, the best move is probably Qe1, with the simultaneous threats of Qxc3+, Qe5+, and Rxc3 with the intention of Rxa3 discovered check. If it's black's move, moving the light-squared bishop to either b3 or f5 may be best (Rxd1+ is a threat, but black doesn't want to do this immediately as that would allow white to move his/her king).
There is such a thing as triple (absolute) pins though. Here's an interesting position, blacks pinning piece is pinned and the piece thats pinning the pinning piece is pinned. I think the game is interestingly enough, drawn:
[fen]rr1r3k/4b2p/4b2P/8/8/b1r3R1/1BN5/BQKQ4 b - - 0 1[/fen]
3 edits
Originally posted by RahimKHere is the position RahimK was talking about:
I saw a position in Yasser S, book winning chess tactics i believe which had about 11 double checks which led to a mate. It was a constructed position but pretty neat. Don't feel like posting it on here though, but look in the book.
The position is taken from a "Study by A. White, 1919", as opposed to a game in which this position actually occurred.
(For those of you with Yasser's book, "Winning Chess Tactics", this is taken from "Test # 99", on page 200).
Yasser's comments in the solution section are: "This position is silly, but it is a good demonstration of the power of a double check. Belive it or not, just 12 moves produce a forced checkmate as follows:
1. Rf2+ Ke3
2. Rf3+ Ke4
3. Re3+ Kd4
4. Re4+ Kd5
5. Rd4+ Kc5
6. Rd5+ Kc6
7.Rc5+ Kb6
8. Rc6+ Kb7
9. Rb6+ Ka7
10. Rb7+ Ka8
11. Ra7+ Kb8
12. Ra8#
Here's the FEN information:
[FEN "2q5/2pp4/3pr3/4pb2/K1p2pn1/2bn1kp1/3pr1R1/6BB w - - 0 1"]
Kind of fun to watch this one play out. But at least Yasser admits that the position itself is "silly" (his word).