# Ladder problems and exercises

*If you don't know ladders, don't play go.*

A ladder problem is a special kind of go problem, in which the reader is asked to read out whether a given ladder works or not. Specially constructed ladder problems can take over one hundred moves, and will contain all sorts of twists and turns.

Ladder exercises are way less artistic but still a good reading practice. In fact it is one of the fundamental lessons in go to read ladders out, visualizing all the stones, without any shortcuts.

### Ladder Problems on Sensei's Library

These ladder problems were specially composed to make for an interesting challenge.

- Valentine's Day Problem
- Nakayama Ladder Problem
- Hayashi Gembi's Loose Ladder
- Longest Ladder Problem
- Gokyo Shumyo Tsumego Series Last 8 problems
- Gokyo Seimyo Tsumego Series 138-146
- Xuanxuan Qijing Problem 343
- Xuanxuan Qijing Problem 344
- Xuanxuan Qijing Problem 345
- Xuanxuan Qijing Problem 346

Nakayama Noriyuki is well known for his skill at composing ladder problems. His book The Treasure Chest Enigma has twenty fine (long and twisted) ladder problems, most of them composed by himself. Hayashi Gembi's loose ladder, the Nakayama name problem and the Valentine's Day problem are but three of the problems featured there.

## Ladder exercises

Here are some reading exercises on ladders, taken from actual games or game-like situations.

- Ladder Exercise 1 (pro game)
- Ladder Exercise 2 (pro game)
- Ladder Exercise 3 (amateur game)
- Ladder Exercise 4 (amateur game) and the associated Ladder exercise 4b
- Ladder Exercise 5 (pro game)
- Ladder Exercise 6 (unknown)
- Ladder Exercise 7
- Ladder Exercise 8
- Ladder Exercise 9
- Ladder Exercise 10
- Ladder Exercise 11
- Ladder Exercise 12
- Ladder Exercise 13
- Ladder Exercise 14

# See also

- Reading Problems
- Problems and Exercises
- Jts is compiling a set of ladder and net problems on L19, available in a single sgf. http://lifein19x19.com/forum/viewtopic.php?p=80790#p80790
- Collected ladder problems: http://stone.dialog.jp/chinro/