# Who played who where and how?

jfkjmh
Posers and Puzzles 13 Aug '05 11:26
1. jfkjmh
nice one
13 Aug '05 11:26
In a chess tournament there are 5 boards.
Players A, B, C, D and E are playing white
while the players F, G, H, I and J have black.
The following openings were chosen:
1.e4 Nf6 2.e5 Nd5,
1.d4 Nf6 2.c4 c5
1.e4 c6 2.d4 d5
1.d4 d5 2.c4 dc:
1.c4 e5 2.Nc3 Nf6
These statements are true about the games:
1. F, having an extra pawn as well as D, plays at board #1
2. A, who made the first move later than G, plays at board #2
3. At board #3 white white played the same first move as A
4. At board #4 black's first move was from a black to a white square
5. The opponent of B gained a material edge on the 2nd move
6. I hasn't moved any pawns within the first 2 moves.
7. A, B, C, F and H have winning positions.

What are the pairings at what board # and which opening was played at which board #?

2. 13 Aug '05 12:36
Originally posted by jfkjmh
In a chess tournament there are 5 boards.
Players A, B, C, D and E are playing white
while the players F, G, H, I and J have black.
The following openings were chosen:
1.e4 Nf6 2.e5 Nd5,
1.d4 Nf6 2.c4 c5
1.e4 c6 2.d4 d5
1.d4 d5 2.c4 dc:
1.c4 e5 2.Nc3 Nf6
These statements are true about the games:
1. F, having an extra pawn as well as D, plays a ...[text shortened]... s at what board # and which opening was played at which board #?

The first statement is a bit ambiguous. I assume it means that D also has an extra pawn (and not that they both play at board #1). How about:

#1 played by E - F : 1.c4 e5 2.Nc3 Nf6
#2 played by A - J : 1.d4 Nf6 2.c4 c5
#3 played by B - G : 1.d4 d5 2.c4 dc:
#4 played by D - H : 1.e4 c6 2.d4 d5
#5 played by C - I : 1.e4 Nf6 2.e5 Nd5
3. BigDoggProblem
13 Aug '05 19:54
Originally posted by jfkjmh
In a chess tournament there are 5 boards.
Players A, B, C, D and E are playing white
while the players F, G, H, I and J have black.
The following openings were chosen:
1.e4 Nf6 2.e5 Nd5,
1.d4 Nf6 2.c4 c5
1.e4 c6 2.d4 d5
1.d4 d5 2.c4 dc:
1.c4 e5 2.Nc3 Nf6
These statements are true about the games:
1. F, having an extra pawn as well as D, plays a ...[text shortened]... s at what board # and which opening was played at which board #?

How can condition #7 be true? They're all book openings.
4. 13 Aug '05 20:36
Originally posted by BigDoggProblem
How can condition #7 be true? They're all book openings.
There is nothing in the statements saying that the 'winning' positions are after black's second move. Another statement is about two players being a pawn up, which also is not the case after all moves #2
5. BigDoggProblem
14 Aug '05 17:43
Originally posted by Mephisto2
There is nothing in the statements saying that the 'winning' positions are after black's second move. Another statement is about two players being a pawn up, which also is not the case after all moves #2
If that's true, then why include step 7 at all?
6. 14 Aug '05 20:07
Originally posted by BigDoggProblem
If that's true, then why include step 7 at all?
Well, step 7 means at least that A, B, C were not playing against F and H ....
7. 15 Aug '05 00:10
Originally posted by Mephisto2
The first statement is a bit ambiguous. I assume it means that D also has an extra pawn (and not that they both play at board #1). How about:

#1 played by E - F : 1.c4 e5 2.Nc3 Nf6
#2 played by A - J : 1.d4 Nf6 2.c4 c5
#3 played by B - G : 1.d4 d5 2.c4 dc:
#4 played by D - H : 1.e4 c6 2.d4 d5
#5 played by C - I : 1.e4 Nf6 2.e5 Nd5
Only 70 minutes!
How, exactly, did you do it ?
8. 15 Aug '05 09:10
Originally posted by propawnkiller
Only 70 minutes!
How, exactly, did you do it ?
From:
S1: F at #1, D not at #1
S2: A at #2, G not at #2
S4: black's first move at #4 was 1. ... c6, meaning 1.e4 c6 2.d4 d5
S3: same opening move at boards 2 and 3, must be 1.d4 (two boards opened 1.e4 but one was at #4)
S5: B plays at #3 (only one opening with a capture)

#1 ?(not D) - F ????
#2 A - ?(not G) 1.d4 Nf6 2.c4 c5
#3 B - ? 1.d4 d5 2.c4 dc:

S7 is very rich. F doesn't play A, B or C (nor D see above), leaves only E:
#1 E - F ?????

S6 I plays the Alekhine, not at #2 or #3, not at #1 (above) hence #4 or #5
but from S7, I plays A, B or C, hence he plays C (B and C on other boards)

from the above, H can only play D (not A, B,C and E plays F)

This leaves only J as opponent for A (not F or H, not G, not I wrong opening)

And that leaves only G as opponent for B (not F or H, not I wrong opening, not J playing A)

Gives the following status:
#1 E - F ???? (not 1.d4)
#2 A - J 1.d4 Nf6 2.c4 c5
#3 B - G 1.d4 d5 2.c4 dc:
?? D - H ???
?? C - I Alekhine

Of the two options remaining, the Alekhine was on board #5 (at #4 black played 1. ... c6)
So, #4 is the Caro Kan, leaving the English as only option for #1. Result:

#1 E - F 1.c4 e5 2.Nc3 Nf6
#2 A - J 1.d4 Nf6 2.c4 c5
#3 B - G 1.d4 d5 2.c4 dc:
#4 D - H 1.e4 c6 2.d4 d5
#5 C - I 1.e4 Nf6 2.e5 Nd5