Non capture positions

Win: 27.368.387 (15.2%)
Draw: 143.152.535 (79.6%)
Lose: 9.404.233 (5.2%)

All positions

Win: 86.572.058 (31.2%)
Draw: 177.349.821 (63.8%)
Lose: 13.953.796 (5.0%)

Native examples were selected after counting from 13008 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 9.

W:W46,47,48,50:B5,K33

MoveResult
47-41Loss
48-42Loss
50-44Loss
46-41Loss
47-42Loss
48-43Win
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 36, Black 9.

W:W46,47,49,50:B5,K16

MoveResult
47-41Loss
49-43Loss
50-44Loss
46-41Loss
47-42Draw
49-44Loss
50-45Loss

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 9.

W:W46,47,48,49:B5,K38

MoveResult
47-41Loss
48-42Win
49-43Loss
46-41Loss
47-42Loss
48-43Win
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 9.

B:W46,47,48,49:B5,K38

MoveResult
38-32Loss
38-27Win
38-21Win
38-16Win
38-33Win
38-29Win
38-24Win
38-20Win
38-15Win
38-42Loss
38-43Loss
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 36, Black 9.

B:W47,48,49,50:B5,K39

MoveResult
39-33Loss
39-28Draw
39-22Draw
39-17Draw
39-11Draw
39-6Draw
39-34Draw
39-30Draw
39-25Draw
39-43Loss
39-44Loss
5-10Loss

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 21, Black 1.

W:W9,13,46,49:B42,K47

MoveResult
9-3Draw
13-8Draw
49-43Draw
9-4Draw
46-41Win
49-44Draw

Promotion trap

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

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White to move: Win. Pip count: White 21, Black 1.

W:W9,13,46,49:B42,K47

MoveResult
9-3Draw
13-8Draw
49-43Draw
9-4Draw
46-41Win
49-44Draw

Both sides at highest pip count: win

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

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

White to move: Win. Pip count: White 36, Black 9.

W:W46,47,48,49:B5,K38

MoveResult
47-41Loss
48-42Win
49-43Loss
46-41Loss
47-42Loss
48-43Win
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 9.

W:W46,47,48,49:B5,K50

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