Non capture positions

Win: 168.777 (0.0%)
Draw: 23.490.823 (5.2%)
Lose: 430.002.382 (94.8%)

All positions

Win: 663.476 (0.1%)
Draw: 64.212.405 (9.3%)
Lose: 628.963.969 (90.6%)

Native examples were selected after counting from 13070 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.

No qualifying example proved from the available WDL data.

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 4, Black 4.

W:W8,20:BK16,28,K34,K43

MoveResult
8-2Loss
20-14Draw
8-3Loss
20-15Loss

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 4, Black 4.

W:W8,20:BK16,28,K34,K43

MoveResult
8-2Loss
20-14Draw
8-3Loss
20-15Loss

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 2, Black 1.

B:W6,7:BK8,K32,45,K49

MoveResult
8-2Win
8-3Win
8-12Draw
8-17Win
8-21Win
8-26Win
8-13Win
8-19Win
8-24Win
8-30Win
8-35Win
32-27Win
32-21Win
32-16Win
32-28Win
32-23Win
32-19Win
32-14Win
32-10Win
32-5Win
32-37Win
32-41Win
32-46Win
32-38Win
32-43Win
49-43Draw
49-38Draw
49-44Win
49-40Win
49-35Win
45-50Draw

Both sides at highest pip count: win

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

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

B:W46,47:B5,K26,K27,K50

MoveResult
26-21Win
26-17Win
26-12Win
26-8Win
26-3Win
26-31Win
26-37Win
26-42Win
26-48Win
27-21Win
27-16Win
27-22Win
27-18Win
27-13Win
27-9Win
27-4Win
27-31Win
27-36Win
27-32Win
27-38Win
27-43Win
27-49Win
50-44Win
50-39Win
50-33Win
50-28Win
50-22Win
50-17Win
50-11Win
50-6Win
50-45Win
5-10Win

Both sides at highest pip count: loss

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

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

W:W46,47:B5,K26,K27,K50

MoveResult
47-41Loss
46-41Loss
47-42Loss