Thread - 26-Letter Puzzle Contest - LMI Monthly Test July 2026

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This is a restricted thread corresponding to an ongoing contest at LMI. This mainly means :

Comments posted in the thread after the contest started can only be viewed by players who have finished the contest. If you are not logged in to forum or if you have not finished the contest, you will see first few characters of the post.

The purpose is to encourage players to freely post comments while the contest is running.

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@ 2026-06-29 11:37 PM (#40854) (#40854) Top

prasanna16391

Posts: 2003

Country : India

prasanna16391 posted @ 2026-06-29 11:37 PM

Link to contest: https://logicmastersindia.com/live/?contest=M202607P

Welcome to 26-Letter Puzzle Contest! Puzzlers Club is back at it again, with a set of 26 puzzles themed after... not the 26 letters of the alphabet, but the 26 NATO phonetic alphabet. You can read about the theme in the IB.
This set was actually created for 24-Hour Puzzle Championship. (The contest title alludes to that.) We wrote this set for 24HPC 2026, but it was postponed to next year. Due to the strong "26" theming, we decided to release this set separately, and this contest was born.
You can find the IB in the contest link above. If you have any questions not answered by the IB, feel free to ask them here.

Edited by chaotic_iak 2026-07-01 5:51 PM

@ 2026-07-10 8:06 AM (#41015 - in reply to #40854) (#41015) Top

randomperson1729

Posts: 12

Country : United States

randomperson1729 posted @ 2026-07-10 8:06 AM

For Balance (#11 on the IB): how exactly is the torque of the main rod calculated with regard to weights on attached rods (i.e. the two bottom rods on the main example)? When I first read the instructions, I thought each subordinate rod's torque on the main rod was calculated by adding the torque of both sides of the smaller rod and multiplying it by the distance of that rod's fulcrum to the main rod's fulcrum, but the math only balances out if you instead use each weight's horizontal distance to the main fulcrum without regard to vertical distance: with the former you get 2*5 _PLUS_ 1(2*2_PLUS_1*4) =! 4(3*1_PLUS_1*3), while with the latter you get 2*5_PLUS_3*2_PLUS_0*4=1*1_PLUS_5*3.

@ 2026-07-10 11:06 AM (#41016 - in reply to #41015) (#41016) Top

chaotic_iak

Posts: 243

Country : Indonesia

chaotic_iak posted @ 2026-07-10 11:06 AM

randomperson1729 - 2026-07-10 11:06 AM

For Balance (#11 on the IB): how exactly is the torque of the main rod calculated with regard to weights on attached rods (i.e. the two bottom rods on the main example)? When I first read the instructions, I thought each subordinate rod's torque on the main rod was calculated by adding the torque of both sides of the smaller rod and multiplying it by the distance of that rod's fulcrum to the main rod's fulcrum, but the math only balances out if you instead use each weight's horizontal distance to the main fulcrum without regard to vertical distance: with the former you get 2*5 _PLUS_ 1(2*2_PLUS_1*4) =! 4(3*1_PLUS_1*3), while with the latter you get 2*5_PLUS_3*2_PLUS_0*4=1*1_PLUS_5*3.

For all the lower rods, you use the lower rod's attachment point on the upper rod. So it reads (distance 2 * weight 5) _PLUS_ (distance 1 * (weight 2_PLUS_4)) = (distance 4 * (weight 1_PLUS_3)).


Restricted Thread This is a restricted thread corresponding to an ongoing contest at LMI. This mainly means : Comments posted in the thread after the contest started can only be viewed by players who have finished the contest. If you are not logged in to forum or if you have not finished the contest, you will see first few characters of the post. The purpose is to encourage players to freely post comments while the contest is running. Admins can make the post public before the contest is over, if it does not reveal anything about the puzzles. All the posts will be made public after the contest is over.
	@ 2026-06-29 11:37 PM (#40854) (#40854) Top
prasanna16391 Posts: 2003 Country : India	prasanna16391 posted @ 2026-06-29 11:37 PM More details will be posted here soon.
	@ 2026-06-30 5:07 PM (#40859 - in reply to #40854) (#40859) Top
Doredla Adilakshmi Posts: 2 Country : India	Doredla Adilakshmi posted @ 2026-06-30 5:07 PM prasanna16391 - 2026-06-29 11:37 PM More details will be posted here soon.
	@ 2026-06-30 5:07 PM (#40860 - in reply to #40854) (#40860) Top
Doredla Adilakshmi Posts: 2 Country : India	Doredla Adilakshmi posted @ 2026-06-30 5:07 PM Im rady sudoku puzzles
	@ 2026-07-01 5:30 PM (#40864 - in reply to #40854) (#40864) Top
chaotic_iak Posts: 243 Country : Indonesia	chaotic_iak posted @ 2026-07-01 5:30 PM Link to contest: https://logicmastersindia.com/live/?contest=M202607P Welcome to 26-Letter Puzzle Contest! Puzzlers Club is back at it again, with a set of 26 puzzles themed after... not the 26 letters of the alphabet, but the 26 NATO phonetic alphabet. You can read about the theme in the IB. This set was actually created for 24-Hour Puzzle Championship. (The contest title alludes to that.) We wrote this set for 24HPC 2026, but it was postponed to next year. Due to the strong "26" theming, we decided to release this set separately, and this contest was born. You can find the IB in the contest link above. If you have any questions not answered by the IB, feel free to ask them here. Edited by chaotic_iak 2026-07-01 5:51 PM
	@ 2026-07-10 8:06 AM (#41015 - in reply to #40854) (#41015) Top
randomperson1729 Posts: 12 Country : United States	randomperson1729 posted @ 2026-07-10 8:06 AM For Balance (#11 on the IB): how exactly is the torque of the main rod calculated with regard to weights on attached rods (i.e. the two bottom rods on the main example)? When I first read the instructions, I thought each subordinate rod's torque on the main rod was calculated by adding the torque of both sides of the smaller rod and multiplying it by the distance of that rod's fulcrum to the main rod's fulcrum, but the math only balances out if you instead use each weight's horizontal distance to the main fulcrum without regard to vertical distance: with the former you get 25 _PLUS_ 1(22_PLUS_14) =! 4(31_PLUS_13), while with the latter you get 25_PLUS_32_PLUS_04=11_PLUS_53.
	@ 2026-07-10 11:06 AM (#41016 - in reply to #41015) (#41016) Top
chaotic_iak Posts: 243 Country : Indonesia	chaotic_iak posted @ 2026-07-10 11:06 AM randomperson1729 - 2026-07-10 11:06 AM For Balance (#11 on the IB): how exactly is the torque of the main rod calculated with regard to weights on attached rods (i.e. the two bottom rods on the main example)? When I first read the instructions, I thought each subordinate rod's torque on the main rod was calculated by adding the torque of both sides of the smaller rod and multiplying it by the distance of that rod's fulcrum to the main rod's fulcrum, but the math only balances out if you instead use each weight's horizontal distance to the main fulcrum without regard to vertical distance: with the former you get 25 _PLUS_ 1(22_PLUS_14) =! 4(31_PLUS_13), while with the latter you get 25_PLUS_32_PLUS_04=11_PLUS_53. For all the lower rods, you use the lower rod's attachment point on the upper rod. So it reads (distance 2 * weight 5) _PLUS_ (distance 1 * (weight 2_PLUS_4)) = (distance 4 * (weight 1_PLUS_3)).