Non capture positions

Win: 136.394.440 (4.8%)
Draw: 2.249.042.761 (78.4%)
Lose: 484.459.502 (16.9%)

All positions

Win: 886.169.694 (16.1%)
Draw: 3.737.954.592 (68.0%)
Lose: 871.473.514 (15.9%)

Native examples were selected after counting from 12895 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 36, Black 18.

W:W46,47,48,49:B4,5,K32

MoveResult
47-41Loss
48-42Draw
49-43Loss
46-41Loss
47-42Win
48-43Loss
49-44Loss

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 20, Black 18.

W:W6,25,35,47:B1,2,K19

MoveResult
25-20Draw
35-30Loss
47-41Loss
47-42Loss

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 36, Black 18.

W:W46,47,48,49:B4,5,K37

MoveResult
47-41Win
48-42Loss
49-43Loss
46-41Loss
47-42Win
48-43Loss
49-44Loss

Win with fewer pieces

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

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Black to move: Win. Pip count: White 36, Black 18.

B:W46,47,48,49:B4,5,K37

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

Draw with fewer pieces

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

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Black to move: Draw. Pip count: White 20, Black 8.

B:W6,25,39,44:BK1,14,45

MoveResult
1-7Draw
1-12Draw
1-18Draw
1-23Draw
1-29Draw
1-34Draw
1-40Draw
14-20Draw
14-19Draw
45-50Draw

Unique winning sacrifice

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

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White to move: Win. Pip count: White 20, Black 15.

W:W15,20,35,50:B5,18,K28

MoveResult
15-10Loss
20-14Win
35-30Draw
50-44Draw
50-45Draw

Promotion trap

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

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White to move: Win. Pip count: White 28, Black 11.

W:W7,48,49,50:B10,K28,34

MoveResult
7-1Win
48-42Draw
49-43Draw
50-44Draw
7-2Draw
48-43Draw
49-44Win
50-45Draw

Both sides at highest pip count: win

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

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White to move: Win. Pip count: White 36, Black 18.

W:W46,47,48,49:B4,5,K37

MoveResult
47-41Win
48-42Loss
49-43Loss
46-41Loss
47-42Win
48-43Loss
49-44Loss

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 36, Black 18.

W:W46,47,48,49:B4,5,K50

MoveResult
47-41Loss
48-42Loss
49-43Loss
46-41Loss
47-42Loss
48-43Loss
49-44Loss