Non capture positions

Win: 6 (0.0%)
Draw: 2.513.106 (17.1%)
Lose: 12.169.448 (82.9%)

All positions

Win: 2.199.699 (7.2%)
Draw: 15.644.825 (51.0%)
Lose: 12.834.256 (41.8%)

Native examples were selected after counting from 10571 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:WK38:B28,39,45,K50

MoveResult
50-44Win
28-33Draw
39-44Draw
28-32Draw
39-43Draw

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 9.

W:WK31:B12,K23,44,45

MoveResult
31-26Draw
31-27Loss
31-22Loss
31-18Loss
31-13Loss
31-9Loss
31-4Loss
31-36Loss
31-37Loss
31-42Loss
31-48Loss

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 9.

W:WK31:B12,K23,44,45

MoveResult
31-26Draw
31-27Loss
31-22Loss
31-18Loss
31-13Loss
31-9Loss
31-4Loss
31-36Loss
31-37Loss
31-42Loss
31-48Loss

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 19.

B:WK34:B8,17,21,K38

MoveResult
38-32Draw
38-27Draw
38-33Draw
38-29Win
38-24Draw
38-20Draw
38-15Draw
38-42Draw
38-47Draw
38-43Draw
38-49Draw
8-13Draw
17-22Draw
21-27Draw
8-12Draw
21-26Draw

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 3.

B:WK26:BK15,43,44,45

MoveResult
15-10Win
15-4Win
15-20Win
15-24Win
15-29Win
15-33Win
15-38Win
15-42Loss
15-47Win
43-49Win
44-50Win
43-48Win
44-49Draw
45-50Win

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.