Killable Eye Shapes
Keywords: Life & Death
This page discusses all killable eyeshapes, including those where there is more than one White stone inside Black's eye space, but the position is not seki.
- Positions with cutting points are not included.
- Side or corner positions are not included.
- Red circles indicate how White can almost fill the black eye space.
- The effective number of internal liberties is included (big eyes).
- The diagrams show the minimum number of internal White stones required to kill Black's group. If the shape is empty ...
- 0: ... Black's group is dead as it stands;
- 1: ... Black's group is unsettled. Strike at the vital point;
- 2 or more: ... Black's group is alive as it stands.
One point shapes
![[Diagram]](../../diagrams/52/6a62a60b234a328e1a5f2a5f4d04fa06.png) | Diag.: Shape #1 |
Number of internal points: 1
Required number of internal White stones to kill: 0
Remaining internal moves to capture: 1
Total internal liberties: 1
Two point shapes
![[Diagram]](../../diagrams/22/031edee876d40cf52addcac87e302e1d.png) | Diag.: Shape #2 |
Number of internal points: 2
Required number of internal White stones to kill: 0
Remaining internal moves to capture: 2
Total internal liberties: 2
Three point shapes
![[Diagram]](../../diagrams/51/fc4d7994baacbf5136d073a056d2ab1e.png) | Diag.: Shape #3.1 |
Number of internal points: 3
Required number of internal White stones to kill: 1
Remaining internal moves to capture: 2
Total internal liberties: 3
![[Diagram]](../../diagrams/8/ddfe10932f5f7f696b3f81411fce2a22.png) | Diag.: Shape #3.2 |
Number of internal points: 3
Required number of internal White stones to kill: 1
Remaining internal moves to capture: 2
Total internal liberties: 3
Four point shapes
![[Diagram]](../../diagrams/50/131301c94ea1d58931c03de4fede71b3.png) | Diag.: Shape #4.1 |
Number of internal points: 4
Required number of internal White stones to kill: 0
Remaining internal moves to capture: 5
Total internal liberties: 5
![[Diagram]](../../diagrams/29/d3ea6b3136bb40ade032b1e6293f3bbe.png) | Diag.: Shape #4.2 |
Number of internal points: 4
Required number of internal White stones to kill: 1
Remaining internal moves to capture: 4
Total internal liberties: 5
![[Diagram]](../../diagrams/26/c652c54df637e540433187b2001c144b.png) | Diag.: Shape #4.3 |
Number of internal points: 4
Required number of internal White stones to kill: 2
Remaining internal moves to capture: 3
Total internal liberties: 5
![[Diagram]](../../diagrams/30/8eda61a50e346503d9140196184462dc.png) | Diag.: Shape #4.4 |
Number of internal points: 4
Required number of internal White stones to kill: 2
Remaining internal moves to capture: 3
Total internal liberties: 5
![[Diagram]](../../diagrams/6/c96e6a56849060e21162821c336fe70a.png) | Diag.: Shape #4.5 |
Number of internal points: 4
Required number of internal White stones to kill: 2
Remaining internal moves to capture: 3
Total internal liberties: 5
Five point shapes
![[Diagram]](../../diagrams/14/cc6fb14213748a11de4b96a6c0f89d86.png) | Diag.: Shape #5.1 |
Number of internal points: 5
Required number of internal White stones to kill: 1
Remaining internal moves to capture: 7
Total internal liberties: 8
![[Diagram]](../../diagrams/31/4f98f47fc148c641294e8eb5acca6cd1.png) | Diag.: Shape #5.2 |
Number of internal points: 5
Required number of internal White stones to kill: 1
Remaining internal moves to capture: 7
Total internal liberties: 8
![[Diagram]](../../diagrams/41/3b51d2ebb6b6beaa7daab0681fd8eed8.png) | Diag.: Shape #5.3 |
Number of internal points: 5
Required number of internal White stones to kill: 2
Remaining internal moves to capture: 6
Total internal liberties: 8
![[Diagram]](../../diagrams/39/3b23a38ec9b244cd4a89c852b39bd6ef.png) | Diag.: Shape #5.4 |
Number of internal points: 5
Required number of internal White stones to kill: 2
Remaining internal moves to capture: 6
Total internal liberties: 8
Six point shapes
![[Diagram]](../../diagrams/0/1b6dd259b761ab7d8f8ac3cdb91f45d2.png) | Diag.: Shape #6.1 |
Number of internal points: 6
Required number of internal White stones to kill: 1
Remaining internal moves to capture: 11
Total internal liberties: 12
![[Diagram]](../../diagrams/33/7f5b45a752dbba649e772563d3c46599.png) | Diag.: Shape #6.2 |
Number of internal points: 6
Required number of internal White stones to kill: 2
Remaining internal moves to capture: 10
Total internal liberties: 12
![[Diagram]](../../diagrams/15/61de6a82f007dec03acefe8eb25f6e51.png) | Diag.: Shape #6.3 |
Number of internal points: 6
Required number of internal White stones to kill: 2
Remaining internal moves to capture: 10
Total internal liberties: 12
![[Diagram]](../../diagrams/16/55ef740137837775baf890992635381f.png) | Diag.: Shape #6.4 |
Number of internal points: 6
Required number of internal White stones to kill: 2
Remaining internal moves to capture: 10
Total internal liberties: 12
![[Diagram]](../../diagrams/50/0a46a79b072d7c42210a18758c36b02b.png) | Diag.: Shape #6.5 |
Number of internal points: 6
Required number of internal White stones to kill: 4
Remaining internal moves to capture: 8
Total internal liberties: 12
![[Diagram]](../../diagrams/17/7a0918ab281de6b8855c026b1500976c.png) | Diag.: Shape #6.6 |
Number of internal points: 6
Required number of internal White stones to kill: 4
Remaining internal moves to capture: 8
Total internal liberties: 12
Seven point shapes
![[Diagram]](../../diagrams/23/b7d76d6d7befb2fad21bd698225d7856.png) | Diag.: Shape #7.1 |
Number of internal points: 7
Required number of internal White stones to kill: 2
Remaining internal moves to capture: 15
Total internal liberties: 17
![[Diagram]](../../diagrams/39/d8343e214f4292e8cee9312547d78588.png) | Diag.: Shape #7.2: Three possible patterns for White. |
Number of internal points: 7
Required number of internal White stones to kill: 3
Remaining internal moves to capture: 14
Total internal liberties: 17
![[Diagram]](../../diagrams/24/ddbf0598ef7b1560692c5e4caac03e06.png) | Diag.: Shape #7.3 |
Number of internal points: 7
Required number of internal White stones to kill: 3
Remaining internal moves to capture: 14
Total internal liberties: 17
![[Diagram]](../../diagrams/18/b0ef417c58e92fcabe0a7486a9831b74.png) | Diag.: Shape #7.4 |
Number of internal points: 7
Required number of internal White stones to kill: 4
Remaining internal moves to capture: 13
Total internal liberties: 17
An eye in the stomach
From 8 points onwards, there are no killing lumps anymore, and the stones inside the eye must (be able to) make an eye themselves, though not a real eye as we usually understand it. An example:
![[Diagram]](../../diagrams/2/b352dadb7b50b3722dcefa7ed0572852.png) | Diag.: Shape #8.1 |
Number of internal points: 8
Required number of internal White stones to kill: 4
Adding a stone at any of the marked points, Black dies, as White connects at a.
If White starts to actually remove the Black stones from the board, she should not play at a, because this will turn the position into seki.
Authors
This is a copy of the living page
"Killable Eye Shapes" at
Sensei's Library.
2003 the Authors, published under the OpenContent License V1.0.
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