Igo Hatsuyo-ron Problems

This page contains links to all the problems from the Igo Hatsuyo-ron. Numberings and categories follow the Japanese 1982 edition by Fujisawa Hideyuki (東洋文庫 412).

Thumbnails: 1-50, 51-100, 101-150, 151-183

Live

Some problems lead to 'ko-live', that is ko for life with many local ko threats.

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
• 11, 12, 13, 14, 15, 16, 17, 18, 19
• 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30

Kill

• 31, 32, 33, 34, 35, 36, 37, 38, 39, 40
• 41, 42, 43, 44, 45, 46, 47, 48, 49, 50
• 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62

Play inside

• 63, 64, 65, 66, 67, 68, 69, 70
• 71, 72, 73, 74, 75, 76

Ko

• 77, 78, 79, 80
• 81, 82, 83, 84, 85, 86, 87, 88, 89, 90
• 91, 92, 93, 94, 95, 96, 97, 98, 99, 100
• 101, 102, 103

Capturing Race

• 104, 105, 106, 107, 108, 109, 110
• 111, 112, 113, 114, 115, 116, 117, 118, 119, 120

Connecting Underneath

• 121, 122, 123, 124, 125, 126, 127, 128, 129, 130
• 131

Wedge

• 132, 133, 134, 135, 136, 137, 138, 139

Oiotoshi

• 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150
• 151, 152, 153, 154, 155

Net

• 156, 157, 158, 159
• 160, 161, 162, 163, 164, 165, 166, 167, 168, 169

Escaping

• 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180
• 181, 182, 183

Some of the problems are labelled to have errors in construction (失題, Shitsudai). Most of such errors result in having multiple solutions, although one or two result in the problem having no solutions at all.

The complete set of problems can be found here. The format of the problems is as follows:

 第[Problem number]题　『[Who plays first]』
 [Diagram]
 【审题】[Problem description]
 〖提示〗[Hint]

黑先 means "Black to play", 白先 means "White to play". Hope this helps.