Non capture positions

Win: 1.272.655 (1.6%)
Draw: 27.974.496 (35.5%)
Lose: 49.614.455 (62.9%)

All positions

Win: 3.722.144 (3.0%)
Draw: 52.983.364 (42.4%)
Lose: 68.194.442 (54.6%)

Native examples were selected after counting from 13504 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 9, Black 21.

W:W10,45:B7,13,30,39

MoveResult
10-4Win
45-40Draw
10-5Draw

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 5, Black 6.

W:W13,16:B38,40,44,45

MoveResult
13-8Loss
13-9Loss
16-11Draw

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 8, Black 24.

W:W9,40:B7,8,19,39

MoveResult
9-3Win
40-34Draw
9-4Draw
40-35Loss

Win with fewer pieces

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

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White to move: Win. Pip count: White 9, Black 21.

W:W10,45:B7,13,30,39

MoveResult
10-4Win
45-40Draw
10-5Draw

Draw with fewer pieces

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

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White to move: Draw. Pip count: White 2, Black 5.

W:W7,8:B36,41,44,45

MoveResult
7-1Draw
8-2Draw
7-2Draw
8-3Draw

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 4, Black 17.

W:W9,20:B18,19,33,37

MoveResult
9-3Draw
20-14Win
9-4Draw
20-15Draw

Promotion trap

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

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White to move: Win. Pip count: White 4, Black 17.

W:W9,20:B18,19,33,37

MoveResult
9-3Draw
20-14Win
9-4Draw
20-15Draw

Both sides at highest pip count: win

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

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

B:W46,47:B1,2,3,4

MoveResult
1-7Win
2-8Win
3-9Win
4-10Win
1-6Win
2-7Win
3-8Win
4-9Win

Both sides at highest pip count: loss

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

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

W:W46,47:B1,2,3,4

MoveResult
47-41Loss
46-41Loss
47-42Loss