Non capture positions

Win: 37.166.724 (100.0%)
Draw: 11.431 (0.0%)
Lose: 0 (0.0%)

All positions

Win: 49.537.684 (100.0%)
Draw: 11.431 (0.0%)
Lose: 0 (0.0%)

Native examples were selected after counting from 13479 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 29, Black 1.

W:W28,29,30,33,42:B44

MoveResult
28-22Draw
29-23Draw
30-24Draw
42-37Draw
28-23Draw
29-24Win
30-25Draw
42-38Draw

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:W8,10,21,29,33:B44

MoveResult
44-50Draw
44-49Loss

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.

No qualifying example proved from the available WDL data.

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 17, Black 1.

B:W7,10,17,27,39: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 32, Black 1.

W:W28,31,34,37,43:B44

MoveResult
28-22Draw
31-26Draw
34-29Draw
43-38Draw
28-23Draw
31-27Draw
34-30Draw
37-32Draw
43-39Win

Promotion trap

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

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White to move: Win. Pip count: White 29, Black 1.

W:W7,32,34,39,47:B45

MoveResult
7-1Draw
32-27Draw
34-29Win
39-33Win
47-41Draw
7-2Draw
32-28Win
34-30Draw
47-42Draw

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 45, Black 9.

W:W46,47,48,49,50:B5

MoveResult
47-41Win
48-42Win
49-43Win
50-44Win
46-41Win
47-42Win
48-43Win
49-44Win
50-45Win

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 45, Black 9.

B:W46,47,48,49,50:B5

MoveResult
5-10Loss