Contest Solutions








Problem # 1

1.16-19! 15x24 2.12-16 7-2
[ 2...7-3 3.16-20 3x21 4.20x27 ]
3.17-21 2x20 4.21x30
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Problem # 2

1.17-22 10-6 2.3-8 12x3 3.13-17 3x21 4.22-25
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Problem # 3

1.7-11 17-14 2.10x17 21x14 3.6-9! 14x5 4.11-16! 18-14 5.1-6! 24-20
[ 5...5-1 6.16-20 1x19 7.20x27 ]
[ 5...14-9 6.6x13 5-1 7.16-19! ( or simply 7.13-17) 7...24x15 8.13-17 1-5 9.17-22 5-23 10.22-25 ]
6.6-9 20x11 7.9x18
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Problem # 4

1.5-9 27-23 2.9-14 22-18
[ 2...23-19 3.13-17 22x13 4.14-18 21-17 5.10-14 17x10 6.18-22 19-15 7.22-25 15-11 8.25-29 ]
3.13-17 18x9 4.10-15!
[ 4.17-22? 23-18 5.22x15 9-5 6.15-19 5-1 7.10-15 21-17 8.15-18 1x24 9.18-23 24-31 ]
4...21x14 5.15-18 23-19 6.18-22 19-15 7.22-25 15-11 8.25-29
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Problem # 5

1.16-19 31-26
[ 1...14-10 2.15x6 27-24 3.20x27 31x15
A) 4.6-9? 15-11 5.9-14 11-8 6.14-18 8-4 7.18-23 4-22 8.5-9 (8.23-27 28-24 9.27x20 22-31 10.5-9 31-27 11.9-13 27-31) 8...28-24 9.9-13 (9.9-14 22-13 10.14-18 13-17) 9...24-19 10.23x16 22-26 11.16-20 26-31
B) 4.5-9! 15-11 5.9-14 11-7 (5...11-8 6.14-18 8-4 7.18-23 4-22 8.23-27 28-24 9.27x20 22-31 10.6-10) 6.14-17 7-2 7.17-21 2x9 8.21-25 ]
2.5-9! 14x5 3.15-18 5-1 4.20-24 27x20 5.18-23 1x24 6.23x30
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Problem # 6

1.2-7! 13x6
[ 1...11x2 is the same ]
2.4-8! 11x4 3.7-11 15x8 4.3x26
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Problem # 7

1.16-19! 23x16 2.10-14! 18x9 3.1-5 16-11
[ 3...17-14 4.6-10 14x7 5.2x27 9-6 ]
4.5x21
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Problem # 8

1...22-18 2.1-5 18x9 3.5x14 23-18 4.14x23 27x18 5.10-15 18-14 6.7-10! 14x16 7.12x19 32-27 8.19-24!
[ 8.15-18? 17-14 9.18x9 21-17 ]
8...27x20 9.15-19 17-14 10.19-23 20-16 11.23-27 16-11 12.27-32 14-10 13.32-18 11-7 14.18-29
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Problem # 9

1.12-16! 22x8 2.7-11 8x15 3.10x28 20x11 4.6-9! 13x6 5.14-18 23x14 6.28-32!
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Problem # 10

1.9-13 17-14 2.3-7 15-10
[ 2...27-23 3.8-11 15x8 4.12x3 18-15 5.7-11 15x8 6.3x12 23-18 7.12-16 19x12 8.20-24 12-8 (8...18-15 9.24-27 15-11 10.27-32 14-10 11.32-14 10x17 12.13x22) 9.24-27 8-3 10.27-31 3-8 11.31-27 ]
3.12-16! 19x3 4.13-17 14x21 5.7x32
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