16 Apr 08
1 edit
Originally posted by heinzkatMakes sense as an idea. Now who's going to do the 99% fieldwork, lol.
Is there already 50 move rule danger? That would explain the problem perhaps. Then it'd be 1. Rxg6 (?) with Qf1#.
edit. it doesn't explain the mate in 3 (and not 2) part, I think
16 Apr 08
Originally posted by jockmcgeeMaybe, but Black can play 2. ... Kg1! For the rest, SwissGambit will probably insist we give the full retrogradic proof, instead this link will do;
Does it not solve it if we have:
1. Rxg6 Rg8+
2. Rxg8 ...
3. Qf1#
?
http://www.mrmip.net/mipsofacto/plaksin.htm
16 Apr 08
Originally posted by heinzkatRetrogradic proofs being beyond me, I'll just correct myself on what I meant before 🙂
Maybe, but Black can play 2. ... Kg1! For the rest, SwissGambit will probably insist we give the full retrogradic proof, instead this link will do;
http://www.mrmip.net/mipsofacto/plaksin.htm
If black plays 2. ... Kg1! doesn't 3. Qe1# work?
16 Apr 08
3 edits
Originally posted by heinzkatThank god I have my chess engine to spare me the hard work of actually solving this.
[fen]2r1kb1r/p2n1p2/8/3R1N1p/Pp1p4/5Q1P/1q4P1/5RK1 w - -[/fen]
White to move. Mate in a few moves [six at most]; should be possible to figure out.
1.Sf5-g7 + !
1...Ke8-d8 2.Rd5*d7 + 2...Kd8*d7 3.Qf3-d5 + [quote] 3...Kd7-e7 4.Rf1*f7 #5...Kc7-b6 6.Qd5-b5 # [/quote] 3...Bf8-d6 4.Rf1*f7 + 4...Kd7-d8 5.Qd5*d6 # [/quote] 1...Ke8-e7 2.Qf3*f7 + 2...Ke7-d8 3.Sg7-e6 # [duals 3.Qf7*d7 # and 3.Rd5*d7 #]
3...Kd7-c7 4.Rf1*f7 + [quote] 4...Kc7-b8 5.Qd5-b7 #
4...Kc7-b6 5.Qd5-b5 #
4...Bf8-e7 5.Rf7*e7 +[quote] 5...Kc7-b8 6.Qd5-b7 #
1...Bf8*g7 2.Qf3*f7 + 2...Ke8-d8 3.Qf7*d7 # [dual 3.Rd5*d7 #][/quote]
16 Apr 08
Originally posted by SwissGambitWas this really necessary?
Thank god I have my chess engine to spare me the hard work of actually solving this.
1.Sf5-g7 + !1...Ke8-d8 2.Rd5*d7 + 2...Kd8*d7 3.Qf3-d5 + [quote] 3...Kd7-e7 4.Rf1*f7 #5...Kc7-b6 6.Qd5-b5 # [/quote ...[text shortened]... f7*d7 # and 3.Rd5*d7 #]
3...Kd7-c7 4.Rf1*f7 + [quote] 4...Kc7-b8 5.Qd5-b7 #
4...Kc7-b6 5.Qd5-b5 #
4...Bf8-e7 5.Rf7*e7 +[quote] 5...Kc7-b8 6.Qd5-b7 #
1...Bf8*g7 2.Qf3*f7 + 2...Ke8-d8 3.Qf7*d7 # [dual 3.Rd5*d7 #][/quote]
16 Apr 08
Originally posted by Mephisto2Permitted, yes. It has clearly been established in this thread that if we feel a problem is too hard for us to solve [or we're just too lazy to bother] we simply look it up and copy and paste the solution, or give a link [thus spoiling it for everyone else]. What I did is just as valid.
Was this really necessary?
16 Apr 08
Originally posted by SwissGambitYour point is taken (at least by me). However, you off all regular posters in the chess and puzzle forums should be able to understand the difference between the last two puzzles. The link you were referring to may have spoiled it for a very small number of members, but only if they decided to click on the solution link. The last puzzle, however, was within many members' reach, and the solution was posted plainly and almost impossible to ignore.
Permitted, yes. It has clearly been established in this thread that if we feel a problem is too hard for us to solve [or we're just too lazy to bother] we simply look it up and copy and paste the solution, or give a link [thus spoiling it for everyone else]. What I did is just as valid.
17 Apr 08
2 edits
Originally posted by Mephisto2And what would have happened with the last puzzle, had I left it alone? The 'many members' would still have been beaten to the punch by the faster solvers in the crowd. The problem isn't that the solution is posted; it's that someone decides for everyone else that the problem isn't even worth solving. That's what's getting spoiled: the potential thrill of being the first to find a difficult solution to a problem that stumps everyone for awhile.
Your point is taken (at least by me). However, you off all regular posters in the chess and puzzle forums should be able to understand the difference between the last two puzzles. The link you were referring to may have spoiled it for a very small number of members, but only if they decided to click on the solution link. The last puzzle, however, was within many members' reach, and the solution was posted plainly and almost impossible to ignore.