Non capture positions

Win: 13 (0.0%)
Draw: 1.265.493 (99.6%)
Lose: 5.672 (0.4%)

All positions

Win: 252.883 (11.3%)
Draw: 1.951.696 (87.4%)
Lose: 28.861 (1.3%)

Native examples were selected after counting from 10457 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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Black to move: Win. Pip count: White 0, Black 2.

B:WK6:BK12,41,45

MoveResult
12-7Draw
12-1Draw
12-8Draw
12-3Draw
12-17Draw
12-21Draw
12-26Draw
12-18Draw
12-23Draw
12-29Draw
12-34Draw
12-40Draw
41-47Draw
41-46Draw
45-50Win

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 0, Black 3.

W:WK1:B40,45,K47

MoveResult
1-6Draw
1-7Loss
1-12Loss
1-18Loss
1-23Loss
1-29Loss
1-34Loss

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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White to move: Draw. Pip count: White 0, Black 2.

W:WK3:BK16,44,45

MoveResult
3-8Draw
3-12Draw
3-17Loss
3-21Loss
3-26Draw
3-9Draw
3-14Draw
3-20Draw
3-25Draw

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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Black to move: Win. Pip count: White 0, Black 3.

B:WK7:BK38,40,45

MoveResult
38-32Draw
38-27Draw
38-21Draw
38-16Draw
38-33Draw
38-29Win
38-24Draw
38-20Draw
38-15Draw
38-42Draw
38-47Draw
38-43Draw
38-49Draw
40-44Draw
45-50Draw

Promotion trap

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

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Black to move: Win. Pip count: White 0, Black 9.

B:WK1:B6,K43,45

MoveResult
43-38Draw
43-32Draw
43-27Draw
43-21Draw
43-16Draw
43-39Win
43-34Win
43-30Win
43-25Win
43-48Win
43-49Draw
6-11Draw
45-50Draw

Both sides at highest pip count: win

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

No qualifying example proved from the available WDL data.

Both sides at highest pip count: loss

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

No qualifying example proved from the available WDL data.