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wu :: forums    riddles    medium (Moderators: Eigenray, Grimbal, ThudnBlunder, william wu, Icarus, SMQ, towr)    Reconstruct The Game (Chess) « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: Reconstruct The Game (Chess)  (Read 681 times) ThudnBlunder wu::riddles Moderator Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Reconstruct The Game (Chess)   Proof_Game_in_12.0.jpg « on: Jul 3rd, 2008, 3:42am » Quote Modify The position below was reached after exactly 12 moves by each player. Find the unique sequence of moves which lead to it. IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. SMQ wu::riddles Moderator Uberpuzzler     Gender: Posts: 2084 Re: Reconstruct The Game (Chess)   « Reply #1 on: Jul 3rd, 2008, 7:08am » Quote Modify After a slight misstep in my first attempt, I get:    1. c4   Nf6  2. Qa4  Ne4  3. Qc6 Nxd2  4. e4   Nb3  5. Bh6  Na6  6. Nd2  Nb4  7. Rc1  Nd5  8. Rc3  Nf6  9. Rf3  Ng8 10. Rf6  Nc5 11. f4   Na6 12. Nf3  Nb8   White's moves are primarily forced by the occupation of d2, which also forces black to capture early.  Avoiding putting white in check forces the knight-switch for black (which is what I missed on my first attempt).   --SMQ « Last Edit: Jul 3rd, 2008, 7:28am by SMQ » IP Logged --SMQ ThudnBlunder wu::riddles Moderator Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Re: Reconstruct The Game (Chess)   « Reply #2 on: Jul 3rd, 2008, 11:33am » Quote Modify Correct, SMQ!   I reckon this problem was tailor-made for your adamantine logic. IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. Paul Hammond Newbie     Posts: 29 Re: Reconstruct The Game (Chess)   « Reply #3 on: Aug 10th, 2008, 5:15am » Quote Modify Isn't black's fifth move in SMQ's solution an illegal move? [edit]Ah sorry, it's the other knight that moves[/edit] « Last Edit: Aug 10th, 2008, 7:25am by Paul Hammond » IP Logged doctorpeppor Newbie     Posts: 1 Re: Reconstruct The Game (Chess)   « Reply #4 on: Nov 26th, 2008, 1:20pm » Quote Modify My roomate got this.    1. c4   Nf6  2. Qa4  Ne4  3. Qc6 Nxd2  4. e4   Nf3  5. Bh6  Ne5  6. Nd2  Ng4  7. Rc1  Nf6  8. Rc3  Ng8  9. Rf3  Na6 10. Rf6  Nb8 11. f4   Na6 12. Nf3  Nb8 IP Logged SMQ wu::riddles Moderator Uberpuzzler     Gender: Posts: 2084 Re: Reconstruct The Game (Chess)   « Reply #5 on: Nov 26th, 2008, 1:30pm » Quote Modify That's 4. ... Nf3+ (white is in check) forcing 5. Kd2 or Ke2 and spoiling the sequence.   --SMQ « Last Edit: Nov 26th, 2008, 1:30pm by SMQ » IP Logged --SMQ Pages: 1  Reply Notify of replies Send Topic Print Forum Jump: ----------------------------- riddles -----------------------------  - easy => medium   - hard   - what am i   - what happened   - microsoft   - cs   - putnam exam (pure math)   - suggestions, help, and FAQ   - general problem-solving / chatting / whatever ----------------------------- general -----------------------------  - guestbook   - truth   - complex analysis   - wanted   - psychology   - chinese « Previous topic | Next topic »

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