Non capture positions

Win: 40.275.014 (94.5%)
Draw: 2.326.739 (5.5%)
Lose: 6.442 (0.0%)

All positions

Win: 52.645.974 (95.8%)
Draw: 2.326.739 (4.2%)
Lose: 6.442 (0.0%)

Native examples were selected after counting from 14038 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 14, Black 0.

W:W7,11,12,24,30:BK1

MoveResult
11-6Win
24-19Draw
7-2Draw
12-8Draw
24-20Draw
30-25Draw

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 19, Black 0.

B:W6,7,27,30,38:BK46

MoveResult
46-41Loss
46-37Loss
46-32Draw
46-28Loss
46-23Loss
46-19Loss
46-14Loss
46-10Loss
46-5Loss

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.

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White to move: Win. Pip count: White 29, Black 0.

W:W14,22,38,42,43:BK35

MoveResult
14-9Win
22-17Draw
38-32Draw
42-37Draw
14-10Draw
22-18Loss
38-33Draw
43-39Draw

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 37, Black 0.

B:W31,36,37,41,47:BK49

MoveResult
49-43Win
49-38Draw
49-32Loss
49-27Loss
49-21Win
49-16Win
49-44Loss
49-40Loss
49-35Loss

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 19, Black 0.

B:W6,7,27,30,38:BK46

MoveResult
46-41Loss
46-37Loss
46-32Draw
46-28Loss
46-23Loss
46-19Loss
46-14Loss
46-10Loss
46-5Loss

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 0.

W:W13,32,38,42,49:BK43

MoveResult
13-8Draw
32-27Win
42-37Draw
13-9Draw
32-28Loss
38-33Draw
49-44Draw

Promotion trap

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

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White to move: Win. Pip count: White 10, Black 0.

W:W6,7,12,13,24:BK1

MoveResult
13-8Win
24-19Win
7-2Draw
12-8Draw
13-9Win
24-20Win

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.