Non capture positions

Win: 23.532 (62.2%)
Draw: 13.754 (36.3%)
Lose: 572 (1.5%)

All positions

Win: 28.464 (66.5%)
Draw: 13.754 (32.1%)
Lose: 572 (1.3%)

Native examples were selected after counting from 18984 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 18, Black 9.

W:W46,47:B5

MoveResult
47-41Draw
46-41Draw
47-42Win

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 15, Black 1.

W:W38,44:B45

MoveResult
38-32Draw
44-39Loss
38-33Loss
44-40Loss

Mutual zugzwang

On this same board, White to move loses and Black to move loses.

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White to move: Loss. Pip count: White 18, Black 2.

W:W47,49:B38

MoveResult
47-41Loss
49-43Loss
47-42Loss
49-44Loss

Whoever moves wins

On this same board, White to move wins and Black to move wins.

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

W:W44,49:B45

MoveResult
44-39Loss
49-43Loss
44-40Win

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 18, Black 1.

B:W47,48:B44

MoveResult
44-50Win
44-49Win

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 18, Black 9.

B:W46,47:B5

MoveResult
5-10Draw

Unique winning sacrifice

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

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

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

W:W44,49:B45

MoveResult
44-39Loss
49-43Loss
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 6, Black 1.

W:W6,26:B45

MoveResult
6-1Draw
26-21Win

Both sides at highest pip count: win

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

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

White to move: Win. Pip count: White 18, Black 9.

W:W46,47:B5

MoveResult
47-41Draw
46-41Draw
47-42Win

Both sides at highest pip count: loss

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

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

Black to move: Loss. Pip count: White 18, Black 9.

B:W47,48:B5

MoveResult
5-10Loss