Non capture positions

Win: 3.832.201 (1.1%)
Draw: 219.776.697 (64.8%)
Lose: 115.668.391 (34.1%)

All positions

Win: 35.961.708 (6.4%)
Draw: 343.784.994 (61.5%)
Lose: 179.003.898 (32.0%)

Native examples were selected after counting from 12234 sampled White-quiet boards, including targeted starting-rank and losing candidates. Statistics still cover every enumerated position. An absent example does not prove the category is absent.


Special WDL positions

One example per category. Every starting position is double quiet: neither side has a capture. Results and move outcomes are relative to the player to move in the diagram. Kings have a double ring.

White-to-move examples are preferred; Black-to-move examples are retained when no qualifying White-to-move example was found.

Pip count means remaining rank distance to promotion (kings: zero). Highest pip count puts men nearest their starting ranks; both sides must simultaneously attain their material's maximum. Material disadvantage means fewer pieces.

Only move to win

At least three legal moves; exactly one wins and every alternative draws or loses.

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White to move: Win. Pip count: White 24, Black 10.

W:W36,41,50:B5,K21,42

MoveResult
50-44Loss
36-31Loss
41-37Win
50-45Loss

Only move to draw

At least two legal moves; exactly one draws and every alternative loses.

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White to move: Draw. Pip count: White 27, Black 18.

W:W46,47,48:B4,5,K15

MoveResult
47-41Loss
48-42Draw
46-41Loss
47-42Loss
48-43Loss

Mutual zugzwang

On this same board, White to move loses and Black to move loses.

No qualifying example proved from the available WDL data.

Whoever moves wins

On this same board, White to move wins and Black to move wins.

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White to move: Win. Pip count: White 24, Black 10.

W:W36,41,50:B5,K21,42

MoveResult
50-44Loss
36-31Loss
41-37Win
50-45Loss

Win with fewer pieces

The player to move has fewer pieces and a proven win.

No qualifying example proved from the available WDL data.

Draw with fewer pieces

The player to move has fewer pieces and a proven draw.

No qualifying example proved from the available WDL data.

Unique winning sacrifice

Exactly one of at least two moves wins; every compulsory reply captures the piece offered by that move.

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

White to move: Win. Pip count: White 24, Black 10.

W:W36,41,50:B5,K21,42

MoveResult
50-44Loss
36-31Loss
41-37Win
50-45Loss

Promotion trap

A promotion draws or loses, while a non-promoting move wins.

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White to move: Win. Pip count: White 11, Black 4.

W:W6,23,35:B34,41,K45

MoveResult
23-18Draw
35-30Win
6-1Draw
23-19Draw

Both sides at highest pip count: win

Both sides attain their maximum pip count; the player to move wins.

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

Black to move: Win. Pip count: White 27, Black 18.

B:W46,47,48:B4,5,K37

MoveResult
37-31Win
37-26Win
37-32Win
37-28Win
37-23Win
37-19Win
37-14Win
37-10Draw
37-41Loss
37-42Loss
4-10Draw
4-9Draw
5-10Draw

Both sides at highest pip count: loss

Both sides attain their maximum pip count; the player to move loses.

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

White to move: Loss. Pip count: White 27, Black 18.

W:W46,47,48:B4,5,K50

MoveResult
47-41Loss
48-42Loss
46-41Loss
47-42Loss
48-43Loss