Non capture positions

Win: 19 (0.0%)
Draw: 1.120.407 (4.5%)
Lose: 23.966.664 (95.5%)

All positions

Win: 1.924.146 (3.7%)
Draw: 23.687.536 (46.1%)
Lose: 25.757.438 (50.1%)

Native examples were selected after counting from 10306 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 7.

B:WK42:B18,K40,41,K46

MoveResult
40-34Draw
40-29Draw
40-23Draw
40-35Draw
40-44Draw
40-49Draw
40-45Draw
18-23Draw
41-47Win
18-22Draw

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:WK16:BK9,K36,40,45

MoveResult
16-11Loss
16-7Loss
16-2Loss
16-21Loss
16-27Loss
16-32Loss
16-38Loss
16-43Loss
16-49Draw

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.

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 3.

W:WK16:BK9,K36,40,45

MoveResult
16-11Loss
16-7Loss
16-2Loss
16-21Loss
16-27Loss
16-32Loss
16-38Loss
16-43Loss
16-49Draw

Unique winning sacrifice

Exactly one of at least two moves wins; every compulsory reply captures the piece offered by that move.

No qualifying example proved from the available WDL data.

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 2.

B:WK32:BK36,44,45,K47

MoveResult
36-31Win
36-27Draw
36-22Win
36-18Win
36-13Win
36-9Win
36-4Win
36-41Draw
47-41Draw
47-42Win
47-38Draw
47-33Win
47-29Win
47-24Win
47-20Win
47-15Win
44-50Win
44-49Win
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.