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Here are the 2005 Puzzle Design Tournament puzzles and the best answers submitted in the tournament.
You can download the puzzle file (pdf) of this tournament here.
You can see the detailed results of this tournament here.
Errata page.

Puzzle by Rajkumar Pal
Best answer 100: 63,93,75,95,79,85,76,96,36,70; 30,81,77,99,89,88,87,60,62,34;
51,97,83,73,100,92,71,98,94,42; 46,67,91,90,84,80,82,64,74,86;
72,61,68,24,26,78,69,56,66,54; 57,65,47,50,58,52,43,59,48,32;
15,55,53,39,44,49,33,45,41,38; 40,28,37,20,35,16,31,29,27,6;
25,13,17,22,19,12,18,11,21,5; 2,23,8,14,9,10,7,3,4,1
by Tim Roberts, Luke Pebody, Andreas Bolota

Puzzle by Ivan Ivec
Best answer 982: A13-D11, B1-D4, B8-D5-R, B16-E14, C6-A9-R, C19-F17, D15-A17,
E5-C2, E9-G6-R, E10-B12, E18-B20, F5-I7-R, G2-J4-R, H11-E13,
H18-J15-R, I3-F1-R, I14-F16, I16-G19-R, J5-M3, K19-M16-R, L17-J20-R,
M13-P11, M19-P17, N2-K4, O4-Q1-R, P2-N5-R, P14-S12, Q7-N9, Q9-T7,
Q16-N18, R5-T2-R, R18-T15-R, S3-Q6-R, S8-P10, S16-Q19-R, T11-Q13
by Andreas Bolota

Puzzle by Nuri Yilmaz
Best answer 106: J10, A1, H9, D2, I7, B3, F8, E4, C6, G5
by Jonathan Rivet

Puzzle by Christian Romon
Best answer 1124: 38,44,50,52,55,61,64,68,72,80,85,87,89,91,93,95
by Tim Roberts

Puzzle by Kahraman Gunduz
Best answer 226: B4-Q, F3-T, H2-T, H7-V, J9-R; 1-2,6-2, 8-5, C-5, F-5
by Rajkumar Pal

Puzzle by Jensen Lai
Best answer 55:
2,13,15, 5,10,35;
17,12, 3,30, 6,18;
8,16,24,20,19, 7;
1, 4, 9,25,36,23;
27,28,21,29,11,14;
22,32,31,26,33,34
by Rajkumar Pal, Nuri Yilmaz, Christian Romon, Tomoaki Tokunaga

Puzzle by Tim Roberts
Best answer 68: eF,GdHcIxJdIexJfxgIHhixjIklmJxnI
by Anatoliy Kazmerchuk, Srinivasan Paul Pandian, Alberto Fabris, Tomoaki Tokunaga, Andreas Bolota, Zafer Huseyin Ergan

Puzzle by Rodrigo Nungaray
Best answer 1140: Z, 25, alphabetical, difference, differences, so, to, two
by Rajkumar Pal, Ivan Ivec, Anatoliy Kazmerchuk, Tomoaki Tokunaga, Ken Duisenberg, Luke Pebody, Andreas Bolota

Puzzle by Anatoliy Kazmerchuk
Best answer 1623602: A-1L, B-1R, E-8F, F-8R, G-8L, H-8F, I-1R, J-1L, K-1L, L-1F,
M-8R,
N-8F, O-3F, P-4L, Q-7L, R-7R, S-8L, T-1F; 323338394041XX,
31343752514243X, 3035365350X4445, 2928272649484746,
2223242516151413, 2120191817X1112, XXXXXX1009,
0102030405060708
by Ivan Ivec

Puzzle by Srinivasan Paul Pandian
Best answer 127: 2,5,6,10; 3,13,9,16; 8,12,14,15; 1,7,4,11
by Ken Duisenberg, Luke Pebody, Andreas Bolota

Puzzle by Alberto Fabris
Best answer 2005:704310871581
by Tim Roberts, Jonathan Rivet, Tomoaki Tokunaga, Andreas Bolota, Zafer Huseyin Ergan

Puzzle by Jonathan Rivet
Best answer 84: 497884-5, 1+-08+--, +51+31+9, 927+45+6, x+++1++2, 546-96+0, -++x+1+1,
2x435-27
by Ivan Ivec, Tomoaki Tokunaga

Puzzle by Tomoaki Tokunaga
Best answer 48,1:
UUUEXFFE,UYUXXXFF,YYYYXZFE,TVVVTZZZ,TTTVILNZ,TWWVILNE,WWPPILNN,WPPPILLN:
ABCCCCBB,BBBCBCCB,BDBCBBBB,BDBCCCEB,BDBEEEEB,DDBBBBBB,DBBFFFFB,BBGGGGFF
by Tim Roberts, Anatoliy Kazmerchuk, Aziz Ates

Puzzle by Ken Duisenberg
Best answer 314: 1732689, 6857914, 7968B97, 9B79862, 894B938, 2819756, 4698375
by Tomoaki Tokunaga

Puzzle by Aziz Ates
Best answer 1501:
.......,.VVV.F.,.V.FFF.,.V..F..,.UU.N..,..U.NN.,.UU..N.,.PPP.N.,.PP..Y.,..T.YY.,..T..Y.,.TTT.Y., ..X..L.,.XXX.L.,..X..L.,.ZZ.LL.,..Z..I.,.WZZ.I.,.WW..I.,
..WW.I.,.....I.,A,C-W,B
by Christian Romon

Puzzle by Luke Pebody
Best answer 183: B1,C1,D1,E1,F1,G1,H1,I1,J1,J2; A1,A2,B2,C2,D2,E2,F2,G2,H2,I2;
A3,B3,C3,D3,E3,F3,G3,H3,I3,J3; A4,B4,C4,A5,C5,D5,A6,C6,D6,A7;
D4,E4,F4,E5,F5,E6,E7,F7,G7,G8; G4,H4,I4,J4,G5,J5,F6,G6,H6,H7;
B5,B6,B7,C7,D7,B8,C8,D8,E8,F8; H5,I5,I6,J6,I7,J7,H8,I8,J8,J9;
A8,A9,B9,C9,D9,E9,F9,G9,H9,I9; A10,B10,C10,D10,E10,F10,G10,H10,I10,J10 -
130:
B1,C1,F1,A2,G2,H2,A3,D3,F3,I3,B4,C4,E4,G4,A5,C6,G6,J6,A7,G7,I7,D8,I8,J8,C9,E9,G9,B10,D10,E10,I10
- 313:
A1,B1,C1,D1,F1,G1,A2,E2,G2,H2,I2,J2,A3,D3,F3,G3,I3,B4,C4,E4,G4,A5,E5,G5,H5,A6,C6,D6,G6,H6, J6,A7,C7,D7,G7,I7,A8,B8,D8,E8,G8,I8,J8,B9,C9,E9,F9,G9,J9,B10,D10,E10,G10,H10,I10
by Tomoaki Tokunaga

Puzzle by Andreas Bolota
Best answer 97: CxDxExABx, xCxDxExAB, BxCxDxExA, ABxCxDxEx, xABxCxDxE, ExABxCxDx, xExABxCxD,
DxExABxCx, xDxExABxC; D1,
DRDRDRDRDRRULULULULULULUURDRDRDRDRDRDRDDRUUULULULULULURRDRDRDRD
by Ivan Ivec, Christian Romon, Tim Roberts, Anatoliy Kazmerchuk, Tomoaki Tokunaga

Puzzle by George Klemic
Best answer 45:APPLEAPRICOTWATERMELONLEMONLIMEAVOCADOSTRAWBERRYPEARPEACHORANGECANTALOUPE
BANANABLUEBERRYRASPBERRY
by Christian Romon, Tomoaki Tokunaga, Andreas Bolota

Puzzle by Zafer Huseyin Ergan
Best answer 4,5: 23814910567,54110763892,61258347109,76329451018,10769218345,38561294710, 45103672981,12983107654,89471056123,91074581236
by Ivan Ivec, Nuri Yilmaz, Christian Romon, Jensen Lai, Tim Roberts, Anatoliy Kazmerchuk, Alberto Fabris, Tomoaki Tokunaga, Luke Pebody

Puzzle by Bogdan Gheorghe
Best answer 4,5: 23814910567,54110763892,61258347109,76329451018,10769218345,38561294710, 45103672981,12983107654,89471056123,91074581236
by Rajkumar Pal, Ivan Ivec, Nuri Yilmaz, Christian Romon, Kahraman Gunduz, Jensen Lai, Tim Roberts, Rodrigo Nungaray, Anatoliy Kazmerchuk, Srinivasan Paul Pandian, Alberto Fabris, Jonathan Rivet, Tomoaki Tokunaga, Ken Duisenberg, Aziz Ates, Luke Pebody
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