Non capture positions

Win: 8 (0.0%)
Draw: 459.923 (0.1%)
Lose: 326.181.325 (99.9%)

All positions

Win: 11.937.066 (1.5%)
Draw: 190.921.079 (24.8%)
Lose: 567.678.655 (73.7%)

Native examples were selected after counting from 9883 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.

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

White to move: Draw. Pip count: White 0, Black 9.

W:WK10:B8,K18,K29,44,K50

MoveResult
10-4Loss
10-5Loss
10-14Loss
10-19Loss
10-23Draw
10-28Loss
10-32Loss
10-37Loss
10-41Loss
10-46Loss
10-15Loss

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.

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

White to move: Draw. Pip count: White 0, Black 9.

W:WK10:B8,K18,K29,44,K50

MoveResult
10-4Loss
10-5Loss
10-14Loss
10-19Loss
10-23Draw
10-28Loss
10-32Loss
10-37Loss
10-41Loss
10-46Loss
10-15Loss

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.

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

Black to move: Win. Pip count: White 0, Black 2.

B:WK50:BK12,K39,44,45,K47

MoveResult
12-7Win
12-1Win
12-8Win
12-3Win
12-17Win
12-21Win
12-26Win
12-18Win
12-23Win
12-29Win
12-34Win
12-40Win
39-33Draw
39-28Draw
39-22Draw
39-17Draw
39-11Draw
39-6Draw
39-34Draw
39-30Draw
39-25Draw
39-43Draw
39-48Draw
47-41Win
47-36Win
47-42Win
47-38Win
47-33Win
47-29Win
47-24Win
47-20Win
47-15Win
44-49Draw

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.