Non capture positions

Win: 0 (0.0%)
Draw: 78.156 (0.0%)
Lose: 529.476.315 (100.0%)

All positions

Win: 50.249 (0.0%)
Draw: 3.108.868 (0.4%)
Lose: 690.680.733 (99.5%)

Native examples were selected after counting from 13182 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.

No qualifying example proved from the available WDL data.

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.

No qualifying example proved from the available WDL data.

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.

No qualifying example proved from the available WDL data.

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 9, Black 18.

B:W46:B4,5,K19,K20,K50

MoveResult
19-13Win
19-8Win
19-2Win
19-14Win
19-10Win
19-23Win
19-28Win
19-32Win
19-37Win
19-41Win
19-24Win
19-30Win
19-35Win
20-14Win
20-9Win
20-3Win
20-15Win
20-24Win
20-29Win
20-33Win
20-38Win
20-42Win
20-47Win
20-25Win
50-44Win
50-39Win
50-33Win
50-28Win
50-22Win
50-17Win
50-11Win
50-6Win
50-45Win
4-10Win
4-9Win
5-10Win

Both sides at highest pip count: loss

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

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

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

W:W46:B4,5,K19,K20,K50

MoveResult
46-41Loss