Non capture positions

Win: 2.330 (5.6%)
Draw: 39.402 (94.4%)
Lose: 0 (0.0%)

All positions

Win: 19.398 (33.0%)
Draw: 39.402 (67.0%)
Lose: 0 (0.0%)

Native examples were selected after counting from 14302 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 0, Black 0.

W:WK1,K12:BK50

MoveResult
1-6Win
1-7Draw
12-7Draw
12-8Draw
12-3Draw
12-17Draw
12-21Draw
12-26Draw
12-18Draw
12-23Draw
12-29Draw
12-34Draw
12-40Draw
12-45Draw

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 0, Black 0.

B:WK2,K6:BK50

MoveResult
50-44Loss
50-39Loss
50-33Loss
50-28Loss
50-22Loss
50-17Loss
50-11Loss
50-45Draw

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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Black to move: Draw. Pip count: White 0, Black 0.

B:WK1,K3:BK50

MoveResult
50-44Draw
50-39Draw
50-33Draw
50-28Draw
50-22Draw
50-17Loss
50-11Draw
50-6Draw
50-45Loss

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 0, Black 0.

W:WK16,K20:BK49

MoveResult
16-11Draw
16-7Draw
16-2Draw
16-21Draw
16-27Draw
16-32Draw
16-38Draw
16-43Loss
20-14Draw
20-9Draw
20-3Draw
20-15Draw
20-24Draw
20-29Draw
20-33Draw
20-38Win
20-42Draw
20-47Draw
20-25Draw

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.

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.