Non capture positions

Win: 4.793.612 (98.2%)
Draw: 87.717 (1.8%)
Lose: 2 (0.0%)

All positions

Win: 6.087.296 (98.6%)
Draw: 87.717 (1.4%)
Lose: 2 (0.0%)

Native examples were selected after counting from 14697 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 20, Black 1.

W:W8,17,42,44:B45

MoveResult
8-2Draw
17-11Draw
42-37Draw
44-39Draw
8-3Draw
17-12Draw
42-38Draw
44-40Win

Only move to draw

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

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Black to move: Draw. Pip count: White 17, Black 1.

B:W6,9,38,42:B44

MoveResult
44-50Loss
44-49Draw

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.

No qualifying example proved from the available WDL data.

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 22, Black 1.

B:W25,30,34,40:B41

MoveResult
41-47Win
41-46Draw

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 14, Black 1.

B:W6,15,28,32:B45

MoveResult
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 1.

W:W8,17,42,44:B45

MoveResult
8-2Draw
17-11Draw
42-37Draw
44-39Draw
8-3Draw
17-12Draw
42-38Draw
44-40Win

Promotion trap

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

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White to move: Win. Pip count: White 15, Black 1.

W:W6,20,22,39:B45

MoveResult
20-14Draw
22-17Win
39-33Win
6-1Draw
20-15Win
22-18Draw
39-34Win

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 9.

W:W46,47,48,49:B5

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

Both sides at highest pip count: loss

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

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

B:W46,47,48,49:B5

MoveResult
5-10Loss