Balance of all 960 positions

One number per starting position: how big is White’s head start. 100 is the most balanced start measured, 0 the least.

CC BY 4.0 Methodology and data: CC BY 4.0 — free to use with attribution to the author.

Chess960 replaces one starting position with 960 of them, and they are not equal. In some the pieces defend each other from the first move; in others a pawn stands undefended and a bishop stares into an empty corner. This page measures that difference for every one of the 960 and puts the result on a single 0–100 scale.

What is measured is the SIZE of White’s edge, not who is better. In 956 of the 960 positions the engine values the initial setup at equality or above for White; the other four come out 2 to 7 centipawns on Black’s side, inside the search’s own noise, and they count exactly like any other small skew — the measure is distance from zero either way. A balanced position is simply one where that head start is as small as it gets.

Every number here comes from one published run with a fixed node budget, and every one of them can be recomputed on your own machine. The method, its limits and the raw data are open — including the parts that would be easier to leave out.

Across all 960 positions the engine value runs from -7 to +83 centipawns, median +26.0.

Bands (v2.0): E 64 · S 386 · M 377 · L 133

The 20 most balanced positions

Position	Setup	Engine, cp	MBI	Class	Band	Dynamics
823	RKBNQRNB	-5	100	A	E	stable
576	BBQRNKRN	0	100	A	E	equalizing
471	RNBNKRQB	0	100	A	E	stable
429	RNQBNKBR	0	100	A	E	equalizing
418	BRNQNBKR	-2	100	A	E	equalizing
217	NQRBBKNR	+3	100	A	E	stable
131	BNRQNKRB	0	100	A	E	equalizing
739	BRKNNQRB	+4	99	A	E	stable
593	BRQBNKRN	+2	99	A	E	equalizing
485	QRBBNKNR	+3	99	A	E	stable
481	BQRBNKNR	+5	99	A	E	equalizing
467	BRNNKRQB	+2	99	A	E	equalizing
433	BRNBNQKR	-4	99	A	E	stable
210	BNQRKBNR	+4	99	A	E	equalizing
67	BNNRKQRB	+4	99	A	E	stable
689	BRQBKNNR	+5	98	A	E	equalizing
497	BRQBNKNR	0	98	A	E	equalizing
443	RNNQBKRB	+5	98	A	E	stable
300	QBNRKRBN	0	98	A	E	equalizing
269	NRKBNQBR	0	98	A	E	stable

The 20 most skewed positions

Position	Setup	Engine, cp	MBI	Class	Band	Dynamics
557	RNKBNQBR	+63	0	D	L	volatile
604	RBQNKRBN	+81	0	D	L	volatile
794	RQKNBBRN	+67	0	D	L	volatile
868	QBBRKRNN	+75	0	D	L	volatile
935	RKBRNQNB	+78	0	D	L	volatile
80	BBNNRKRQ	+83	1	D	L	volatile
268	NBRKNQBR	+58	1	D	L	equalizing
272	BBNRKNRQ	+58	1	D	L	volatile
332	NBRQKRBN	+59	1	D	L	equalizing
348	NBRKQRBN	+62	1	D	L	equalizing
578	BQRNKBRN	+56	1	D	L	equalizing
620	RBNQKRBN	+63	1	D	L	volatile
784	BBRQKNRN	+58	1	D	L	equalizing
879	QRKRNNBB	+66	1	D	L	volatile
880	BBRQKRNN	+63	1	D	L	equalizing
176	BBNRNKRQ	+53	2	D	L	equalizing
298	QNRKBBRN	+53	2	D	L	equalizing
316	NBQRKRBN	+56	2	D	L	equalizing
591	QRNKRNBB	+54	2	D	L	volatile
608	BBRNQKRN	+53	2	D	L	equalizing

Contested positions

Position	Engine, cp	Deep, cp	Verdict	Self-play v2
102	0	+20	White edge — the minus was noise	54.5% (44.8–63.9%)
131	0	+5	even — within engine noise	50.5% (40.9–60.1%)
204	0	+9	even — within engine noise	47.5% (38.0–57.2%)
269	0	+15	White edge — the minus was noise	48.5% (38.9–58.2%)
300	0	+12	White edge — the minus was noise	51.5% (41.8–61.1%)
401	-7	0	even — within engine noise	49.0% (39.4–58.7%)
418	-2	+5	even — within engine noise	50.5% (40.9–60.1%)
429	0	+10	even — within engine noise	51.0% (41.3–60.6%)
433	-4	+3	even — within engine noise	51.5% (41.8–61.1%)
471	0	+15	White edge — the minus was noise	50.0% (40.4–59.6%)
497	0	+6	even — within engine noise	49.0% (39.4–58.7%)
576	0	+13	White edge — the minus was noise	50.0% (40.4–59.6%)
823	-5	0	even — within engine noise	51.5% (41.8–61.1%)

All 960 positions

Click a column header to sort.

Position	Setup	Engine, cp	MBI	Class	Band	Dynamics
823	RKBNQRNB	-5	100	A	E	stable
576	BBQRNKRN	0	100	A	E	equalizing
471	RNBNKRQB	0	100	A	E	stable
429	RNQBNKBR	0	100	A	E	equalizing
418	BRNQNBKR	-2	100	A	E	equalizing
217	NQRBBKNR	+3	100	A	E	stable
131	BNRQNKRB	0	100	A	E	equalizing
739	BRKNNQRB	+4	99	A	E	stable
593	BRQBNKRN	+2	99	A	E	equalizing
485	QRBBNKNR	+3	99	A	E	stable
481	BQRBNKNR	+5	99	A	E	equalizing
467	BRNNKRQB	+2	99	A	E	equalizing
433	BRNBNQKR	-4	99	A	E	stable
210	BNQRKBNR	+4	99	A	E	equalizing
67	BNNRKQRB	+4	99	A	E	stable
689	BRQBKNNR	+5	98	A	E	equalizing
497	BRQBNKNR	0	98	A	E	equalizing
443	RNNQBKRB	+5	98	A	E	stable
300	QBNRKRBN	0	98	A	E	equalizing
269	NRKBNQBR	0	98	A	E	stable
259	BNRKNQRB	+3	98	A	E	stable
102	QNBRNBKR	0	98	A	E	stable
922	RKRQBBNN	+7	97	A	E	equalizing
786	BRQKNBRN	+2	97	A	E	stable
774	QRBKNBRN	+6	97	A	E	volatile
675	BQRKNNRB	+6	97	A	E	stable
489	QRNBBKNR	+7	97	A	E	stable
287	NRKNRQBB	+7	97	A	E	equalizing
226	BNRQKBNR	+6	97	A	E	equalizing
168	NBRNBKQR	+7	97	A	E	sharpening
161	BNRBNKQR	+6	97	A	E	equalizing
130	BNRQNBKR	+7	97	A	E	stable
119	NQBRNKRB	+7	97	A	E	equalizing
35	BNNQRKRB	+6	97	A	E	equalizing
801	BRKBQNRN	+11	96	A	S	stable
514	BRNQKBNR	+8	96	A	E	equalizing
500	RBBQNKNR	+8	96	A	E	equalizing
402	BRQNNBKR	+8	96	A	E	stable
401	BRQBNNKR	-7	96	A	E	stable
233	NRQBBKNR	+8	96	A	E	equalizing
222	NQRKNBBR	+8	96	A	E	equalizing
212	NBBQRKNR	+8	96	A	E	stable
85	NNBBRKRQ	+8	96	A	E	equalizing
521	RNQBBKNR	+9	95	A	E	stable
432	BBRNNQKR	+3	95	A	E	equalizing
410	RQNNBBKR	+9	95	A	E	stable
380	NBRKRNBQ	+9	95	A	E	stable
44	NBNQRKBR	+9	95	A	E	equalizing
690	BRQKNBNR	+10	94	A	E	stable
668	RBNKRNBQ	+10	94	A	E	equalizing
615	RNBQKRNB	+10	94	A	E	stable
613	RNBBQKRN	+10	94	A	E	volatile
579	BQRNKRNB	+10	94	A	E	equalizing
547	BRNKNQRB	+10	94	A	E	stable
483	BQRNKNRB	+10	94	A	E	equalizing
442	RNNQBBKR	+10	94	A	E	stable
301	QNRBKRBN	+10	94	A	E	stable
260	NBBRKNQR	+10	94	A	E	stable
156	NBRNQKBR	+10	94	A	E	equalizing
145	BNRBNQKR	+10	94	A	E	equalizing
118	NQBRNBKR	+10	94	A	E	equalizing
115	BNQRNKRB	+10	94	A	E	stable
109	QNRBNKBR	+10	94	A	E	equalizing
39	NNBQRKRB	+10	94	A	E	equalizing
662	RNBKRBNQ	+11	93	A	S	equalizing
596	RBBQNKRN	+11	93	A	S	equalizing
518	RNBQKBNR	+11	93	A	S	stable
445	RNNBQKBR	+11	93	A	S	stable
343	NRBKQRNB	+11	93	A	S	stable
270	NRKNQBBR	+11	93	A	S	stable
204	QBNRKNBR	0	93	A	E	equalizing
114	BNQRNBKR	+11	93	A	S	equalizing
38	NNBQRBKR	+11	93	A	S	stable
885	RQBBKRNN	+14	92	A	S	stable
833	BRKBNRQN	+12	92	A	S	equalizing
796	RBQKNRBN	+12	92	A	S	stable
371	BNRKRNQB	+12	92	A	S	equalizing
208	BBNQRKNR	+12	92	A	S	stable
194	BQNRKBNR	+12	92	A	S	equalizing
180	NBBRNKRQ	+12	92	A	S	equalizing
140	NBRQNKBR	+12	92	A	S	stable
41	NNQBBRKR	+12	92	A	S	equalizing
29	NQNBRKBR	+12	92	A	S	equalizing
759	RKBNNRQB	+13	91	A	S	stable
745	RKNBBNQR	+13	91	A	S	equalizing
674	BQRKNBNR	+13	91	A	S	equalizing
673	BQRBKNNR	+13	91	A	S	equalizing
597	RQBBNKRN	+13	91	A	S	equalizing
595	BRQNKRNB	+13	91	A	S	stable
567	RNBKNRQB	+13	91	A	S	equalizing
498	BRQNKBNR	+13	91	A	S	equalizing
462	RNNKQBBR	+13	91	A	S	equalizing
455	RNBNKQRB	+13	91	A	S	equalizing
444	RBNNQKBR	+13	91	A	S	equalizing
322	BNRQKBRN	+13	91	A	S	equalizing
215	NQBRKNRB	+13	91	A	S	stable
209	BNQBRKNR	+13	91	A	S	stable
135	NRBQNKRB	+13	91	A	S	equalizing
23	NQBNRKRB	+13	91	A	S	stable
921	RKRBBQNN	+14	89	A	S	equalizing
912	BBRKRQNN	+14	89	A	S	equalizing
834	BRKNRBQN	+14	89	A	S	equalizing
757	RKBBNNRQ	+14	89	A	S	stable
643	BRNKRQNB	+14	89	A	S	stable
577	BQRBNKRN	+14	89	A	S	equalizing
517	RNBBQKNR	+14	89	A	S	stable
449	BRNBNKQR	+14	89	A	S	volatile
421	RNBBQNKR	+14	89	A	S	stable
419	BRNQNKRB	+14	89	A	S	stable
386	BQRNNBKR	+14	89	A	S	equalizing
385	BQRBNNKR	+14	89	A	S	stable
339	BNRKQRNB	+14	89	A	S	stable
195	BQNRKNRB	+14	89	A	S	stable
155	NRNQBKRB	+14	89	A	S	stable
154	NRNQBBKR	+14	89	A	S	equalizing
108	QBNRNKBR	+14	89	A	S	equalizing
34	BNNQRBKR	+14	89	A	S	stable
30	NQNRKBBR	+14	89	A	S	stable
14	QNNRKBBR	+14	89	A	S	stable
942	RKRNQBBN	+15	86	A	S	equalizing
918	RKBRQBNN	+15	86	A	S	volatile
818	BRKNQBRN	+15	86	A	S	volatile
802	BRKQNBRN	+15	86	A	S	equalizing
750	RKNNQBBR	+15	86	A	S	stable
692	RBBQKNNR	+15	86	A	S	stable
659	BRNKRNQB	+15	86	A	S	stable
647	RNBKRQNB	+15	86	A	S	stable
631	RNBKQRNB	+15	86	A	S	equalizing
611	BRNQKRNB	+15	86	A	S	equalizing
603	RQNKBRNB	+15	86	A	S	equalizing
600	RBQNBKRN	+15	86	A	S	equalizing
551	RNBKNQRB	+15	86	A	S	equalizing
513	BRNBQKNR	+15	86	A	S	stable
509	RQNBKNBR	+15	86	A	S	equalizing
428	RBNQNKBR	+15	86	A	S	equalizing
423	RNBQNKRB	+15	86	A	S	stable
393	QRNBBNKR	+15	86	A	S	stable
361	NRKBBRQN	+15	86	A	S	stable
338	BNRKQBRN	+15	86	A	S	stable
324	NBBRQKRN	+15	86	A	S	equalizing
323	BNRQKRNB	+15	86	A	S	stable
309	NQBBRKRN	+15	86	A	S	stable
286	NRKNRBBQ	+15	86	A	S	stable
172	NBRNKQBR	+15	86	A	S	stable
92	NBNRKRBQ	+15	86	A	S	volatile
43	NNQRBKRB	+15	86	A	S	stable
890	RQKRBBNN	+16	83	A	S	stable
865	BQRBKRNN	+16	83	A	S	stable
819	BRKNQRNB	+16	83	A	S	stable
795	RQKNBRNB	+16	83	A	S	equalizing
771	BQRKNRNB	+16	83	A	S	stable
770	BQRKNBRN	+16	83	A	S	stable
709	RKBBQNNR	+16	83	A	S	stable
644	RBBNKRQN	+16	83	A	S	stable
641	BRNBKRQN	+16	83	A	S	volatile
626	BRNKQBRN	+16	83	A	S	equalizing
543	RNKQNRBB	+16	83	A	S	stable
512	BBRNQKNR	+16	83	A	S	stable
501	RQBBNKNR	+16	83	A	S	stable
475	RNNKBRQB	+16	83	A	S	equalizing
468	RBBNNKRQ	+16	83	A	S	volatile
431	RNQNKRBB	+16	83	A	S	stable
422	RNBQNBKR	+16	83	A	S	stable
407	RQBNNKRB	+16	83	A	S	equalizing
404	RBBQNNKR	+16	83	A	S	stable
403	BRQNNKRB	+16	83	A	S	equalizing
387	BQRNNKRB	+16	83	A	S	stable
351	NRKQRNBB	+16	83	A	S	stable
326	NRBQKBRN	+16	83	A	S	stable
311	NQBRKRNB	+16	83	A	S	equalizing
302	QNRKRBBN	+16	83	A	S	stable
281	NRKBBNRQ	+16	83	A	S	stable
278	NRBKNBRQ	+16	83	A	S	stable
255	NRKQNRBB	+16	83	A	S	stable
223	NQRKNRBB	+16	83	A	S	stable
198	QNBRKBNR	+16	83	A	S	stable
197	QNBBRKNR	+16	83	A	S	stable
98	BQNRNBKR	+16	83	A	S	stable
531	BRNKQNRB	+13	81	A	S	equalizing
955	RKRNBNQB	+17	80	A	S	stable
900	RBBKQRNN	+17	80	A	S	stable
884	RBBQKRNN	+17	80	A	S	volatile
851	BRKNRNQB	+17	80	A	S	stable
849	BRKBNRNQ	+17	80	A	S	equalizing
769	BQRBKNRN	+17	80	A	S	stable
737	BRKBNNQR	+17	80	A	S	equalizing
663	RNBKRNQB	+17	80	A	S	equalizing
661	RNBBKRNQ	+17	80	A	S	stable
652	RBNKRQBN	+17	80	A	S	equalizing
624	BBRNKQRN	+17	80	A	S	stable
616	RBNQBKRN	+17	80	A	S	stable
610	BRNQKBRN	+17	80	A	S	stable
581	QRBBNKRN	+17	80	A	S	equalizing
563	BRNKNRQB	+17	80	A	S	equalizing
486	QRBNKBNR	+17	80	A	S	stable
389	QRBBNNKR	+17	80	A	S	stable
320	BBNRQKRN	+17	80	A	S	stable
258	BNRKNBQR	+17	80	A	S	stable
242	BNRKQBNR	+17	80	A	S	stable
235	NRQKBNRB	+17	80	A	S	stable
229	NRBBQKNR	+17	80	A	S	stable
225	BNRBQKNR	+17	80	A	S	equalizing
183	NRBNKRQB	+17	80	A	S	stable
157	NRNBQKBR	+17	80	A	S	equalizing
103	QNBRNKRB	+17	80	A	S	equalizing
99	BQNRNKRB	+17	80	A	S	equalizing
84	NBBNRKRQ	+17	80	A	S	equalizing
867	BQRKRNNB	+18	78	A	S	equalizing
856	RBKNBRNQ	+18	78	A	S	volatile
826	RKNQBBRN	+18	78	A	S	equalizing
788	RBBQKNRN	+18	78	A	S	stable
754	BRKNNBRQ	+18	78	A	S	sharpening
552	RBNKBNQR	+18	78	A	S	equalizing
451	BRNNKQRB	+18	78	A	S	stable
285	NRKBNRBQ	+18	78	A	S	stable
247	NRBKQNRB	+18	78	A	S	equalizing
211	BNQRKNRB	+18	78	A	S	stable
201	QNRBBKNR	+18	78	A	S	stable
192	BBQNRKNR	+18	78	A	S	equalizing
182	NRBNKBRQ	+18	78	A	S	equalizing
179	BNRNKRQB	+18	78	A	S	stable
143	NRQNKRBB	+18	78	A	S	stable
556	RBNKNQBR	+21	77	A	S	equalizing
840	RBKNBRQN	+19	75	B	S	stable
787	BRQKNRNB	+19	75	B	S	stable
755	BRKNNRQB	+19	75	B	S	stable
753	BRKBNNRQ	+19	75	B	S	stable
747	RKNNBQRB	+19	75	B	S	stable
725	RKBBNQNR	+19	75	B	S	stable
701	RQKBNNBR	+19	75	B	S	stable
664	RBNKBRNQ	+19	75	B	S	stable
649	RNKBBRQN	+19	75	B	S	stable
642	BRNKRBQN	+19	75	B	S	stable
627	BRNKQRNB	+19	75	B	S	stable
558	RNKNQBBR	+19	75	B	S	stable
524	RBNQKNBR	+19	75	B	S	equalizing
520	RBNQBKNR	+19	75	B	S	stable
448	BBRNNKQR	+19	75	A	S	stable
406	RQBNNBKR	+19	75	A	S	stable
363	NRKRBQNB	+19	75	A	S	stable
329	NRQBBKRN	+19	75	A	S	stable
327	NRBQKRNB	+19	75	A	S	volatile
295	QNBRKRNB	+19	75	A	S	stable
291	BQNRKRNB	+19	75	A	S	stable
284	NBRKNRBQ	+19	75	A	S	equalizing
275	BNRKNRQB	+19	75	A	S	equalizing
218	NQRKBBNR	+19	75	A	S	stable
206	QNRKNBBR	+19	75	A	S	stable
152	NBRNBQKR	+19	75	A	S	stable
124	NBQRNKBR	+19	75	A	S	equalizing
121	NQRBBNKR	+19	75	A	S	stable
58	NNRQBBKR	+19	75	A	S	equalizing
46	NNQRKBBR	+19	75	A	S	stable
1	BQNBNRKR	+19	75	A	S	stable
797	RQKBNRBN	+20	72	B	S	stable
782	QRKNRBBN	+20	72	B	S	stable
727	RKBNQNRB	+20	72	B	S	volatile
691	BRQKNNRB	+20	72	B	S	stable
679	QRBKNNRB	+20	72	B	S	equalizing
559	RNKNQRBB	+20	72	B	S	stable
553	RNKBBNQR	+20	72	B	S	stable
544	BBRNKNQR	+20	72	B	S	equalizing
496	BBRQNKNR	+20	72	B	S	equalizing
495	QRNKNRBB	+20	72	B	S	volatile
437	RNBBNQKR	+20	72	B	S	stable
395	QRNNBKRB	+20	72	B	S	stable
376	NBRKBRNQ	+20	72	B	S	equalizing
350	NRKQRBBN	+20	72	B	S	volatile
319	NQRKRNBB	+20	72	B	S	equalizing
288	BBQNRKRN	+20	72	B	S	sharpening
220	NBQRKNBR	+20	72	B	S	stable
205	QNRBKNBR	+20	72	B	S	equalizing
117	NQBBRNKR	+20	72	B	S	stable
116	NBBQRNKR	+20	72	B	S	equalizing
54	NNBRQBKR	+20	72	B	S	stable
47	NNQRKRBB	+20	72	B	S	volatile
17	BNQBNRKR	+20	72	B	S	equalizing
3	BQNNRKRB	+20	72	B	S	stable
0	BBQNNRKR	+20	72	B	S	stable
499	BRQNKNRB	+18	71	B	S	equalizing
959	RKRNNQBB	+21	69	B	S	equalizing
930	BRKRNBQN	+21	69	B	S	equalizing
913	BRKBRQNN	+21	69	B	S	equalizing
901	RKBBQRNN	+21	69	B	S	equalizing
831	RKNQRNBB	+21	69	B	S	volatile
813	RKQBNRBN	+21	69	B	S	stable
763	RKNNBRQB	+21	69	B	S	stable
761	RKNBBNRQ	+21	69	B	S	stable
743	RKBNNQRB	+21	69	B	S	stable
703	RQKNNRBB	+21	69	B	S	equalizing
693	RQBBKNNR	+21	69	B	S	stable
671	RNKRNQBB	+21	69	B	S	equalizing
635	RNKQBRNB	+21	69	B	S	stable
619	RNQKBRNB	+21	69	B	S	stable
601	RQNBBKRN	+21	69	B	S	stable
599	RQBNKRNB	+21	69	B	S	stable
588	QBRNKRBN	+21	69	B	S	volatile
585	QRNBBKRN	+21	69	B	S	stable
516	RBBNQKNR	+21	69	B	S	stable
515	BRNQKNRB	+21	69	B	S	equalizing
506	RQNKBBNR	+21	69	B	S	sharpening
502	RQBNKBNR	+21	69	B	S	stable
480	BBQRNKNR	+21	69	B	S	stable
469	RNBBNKRQ	+21	69	B	S	stable
391	QRBNNKRB	+21	69	B	S	stable
384	BBQRNNKR	+21	69	B	S	stable
372	NBBRKRNQ	+21	69	B	S	volatile
318	NQRKRBBN	+21	69	B	S	stable
299	QNRKBRNB	+21	69	B	S	stable
224	BBNRQKNR	+21	69	B	S	stable
214	NQBRKBNR	+21	69	B	S	stable
199	QNBRKNRB	+21	69	B	S	stable
167	NRBNKQRB	+21	69	B	S	stable
151	NRBNQKRB	+21	69	B	S	equalizing
78	NNRKQBBR	+21	69	B	S	equalizing
20	NBBQNRKR	+21	69	B	S	stable
956	RBKRNNBQ	+22	65	B	S	stable
948	RBBKRNNQ	+22	65	B	S	stable
937	RKRBBNQN	+22	65	B	S	stable
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91	NNRKBRQB	+34	26	C	M	stable
40	NBNQBRKR	+34	26	C	M	stable
858	RKNRBBNQ	+35	24	D	M	stable
852	RBBKNRNQ	+35	24	D	M	stable
829	RKNBQRBN	+35	24	D	M	stable
780	QBRKNRBN	+35	24	D	M	stable
732	RBKNQNBR	+35	24	D	M	sharpening
729	RKNBBQNR	+35	24	D	M	volatile
705	BRKBQNNR	+35	24	D	M	stable
658	BRNKRBNQ	+35	24	D	M	stable
645	RNBBKRQN	+35	24	D	M	stable
590	QRNKRBBN	+35	24	D	M	stable
510	RQNKNBBR	+35	24	D	M	stable
503	RQBNKNRB	+35	24	D	M	volatile
478	RNNKRBBQ	+35	24	D	M	stable
466	BRNNKBRQ	+35	24	D	M	stable
416	BBRNQNKR	+35	24	D	M	stable
330	NRQKBBRN	+35	24	D	M	volatile
294	QNBRKBRN	+35	24	D	M	stable
264	NBRKBNQR	+35	24	D	M	stable
245	NRBBKQNR	+35	24	D	M	equalizing
234	NRQKBBNR	+35	24	D	M	stable
142	NRQNKBBR	+35	24	D	M	sharpening
129	BNRBQNKR	+35	24	D	M	stable
105	QNRBBNKR	+35	24	D	M	stable
88	NBNRBKRQ	+35	24	C	M	stable
81	BNNBRKRQ	+35	24	C	M	volatile
957	RKRBNNBQ	+36	21	D	M	equalizing
874	QRKRBBNN	+36	21	D	M	volatile
842	RKNRBBQN	+36	21	D	M	stable
815	RKQNRNBB	+36	21	D	M	stable
766	RKNNRBBQ	+36	21	D	M	equalizing
736	BBRKNNQR	+36	21	D	M	stable
734	RKNQNBBR	+36	21	D	M	stable
710	RKBQNBNR	+36	21	D	M	equalizing
687	QRKNNRBB	+36	21	D	M	stable
684	QBRKNNBR	+36	21	D	M	stable
589	QRNBKRBN	+36	21	D	M	stable
580	QBBRNKRN	+36	21	D	M	equalizing
378	NRKRBBNQ	+36	21	D	M	volatile
362	NRKRBBQN	+36	21	D	M	stable
313	NQRBBKRN	+36	21	D	M	stable
261	NRBBKNQR	+36	21	D	M	sharpening
173	NRNBKQBR	+36	21	D	M	stable
112	BBNQRNKR	+36	21	D	M	equalizing
79	NNRKQRBB	+36	21	D	M	stable
62	NNRQKBBR	+36	21	D	M	stable
26	NQNRBBKR	+36	21	D	M	equalizing
735	RKNQNRBB	+37	20	D	M	stable
721	BRKBNQNR	+37	20	D	M	stable
707	BRKQNNRB	+37	20	D	M	stable
636	RBNKQRBN	+37	20	D	M	equalizing
618	RNQKBBRN	+37	20	D	M	equalizing
570	RNKNBBRQ	+37	20	D	M	stable
545	BRNBKNQR	+37	20	D	M	volatile
375	NRBKRNQB	+37	20	D	M	equalizing
347	NRKQBRNB	+37	20	D	M	equalizing
335	NRQKRNBB	+37	20	D	M	stable
170	NRNKBBQR	+37	20	D	M	stable
72	NBNRBKQR	+37	20	D	M	stable
71	NNBRKQRB	+37	20	D	M	stable
292	QBBNRKRN	+49	19	D	L	stable
896	BBRKQRNN	+38	18	D	M	sharpening
876	QBRKRNBN	+38	18	D	M	stable
872	QBRKBRNN	+38	18	D	M	stable
857	RKNBBRNQ	+38	18	D	M	stable
808	RBKQBNRN	+38	18	D	M	volatile
717	RKQBNNBR	+38	18	D	M	stable
697	RQKBBNNR	+38	18	D	M	volatile
628	RBBNKQRN	+38	18	D	M	volatile
621	RNQBKRBN	+38	18	D	M	stable
488	QBRNBKNR	+38	18	D	M	stable
366	NRKRQBBN	+38	18	D	M	equalizing
357	NRBBKRQN	+38	18	D	M	stable
263	NRBKNQRB	+38	18	D	M	stable
250	NRKQBBNR	+38	18	D	M	stable
146	BNRNQBKR	+38	18	D	M	stable
75	NNRKBQRB	+38	18	D	M	equalizing
8	QBNNBRKR	+38	18	D	M	volatile
4	QBBNNRKR	+38	18	D	M	stable
952	RBKRBNNQ	+39	16	D	M	stable
897	BRKBQRNN	+39	16	D	M	equalizing
887	RQBKRNNB	+39	16	D	M	stable
776	QBRKBNRN	+39	16	D	M	equalizing
715	RKQNBNRB	+39	16	D	M	stable
646	RNBKRBQN	+39	16	D	M	stable
633	RNKBBQRN	+39	16	D	M	equalizing
533	RNBBKQNR	+39	16	D	M	equalizing
470	RNBNKBRQ	+39	16	D	M	stable
430	RNQNKBBR	+39	16	D	M	stable
365	NRKBRQBN	+39	16	D	M	stable
290	BQNRKBRN	+39	16	D	M	stable
237	NRQBKNBR	+39	16	D	M	equalizing
236	NBRQKNBR	+39	16	D	M	stable
164	NBBRNKQR	+39	16	D	M	stable
147	BNRNQKRB	+39	16	D	M	equalizing
113	BNQBRNKR	+39	16	D	M	volatile
101	QNBBRNKR	+39	16	D	M	stable
33	BNNBQRKR	+39	16	D	M	stable
903	RKBQRNNB	+40	14	D	M	equalizing
809	RKQBBNRN	+40	14	D	M	stable
790	RQBKNBRN	+40	14	D	M	sharpening
765	RKNBNRBQ	+40	14	D	M	equalizing
748	RBKNNQBR	+42	14	D	L	stable
696	RBQKBNNR	+40	14	D	M	volatile
634	RNKQBBRN	+40	14	D	M	stable
550	RNBKNBQR	+40	14	D	M	stable
484	QBBRNKNR	+40	14	D	M	equalizing
425	RNQBBNKR	+40	14	D	M	stable
360	NBRKBRQN	+40	14	D	M	stable
310	NQBRKBRN	+40	14	D	M	equalizing
120	NBQRBNKR	+40	14	D	M	equalizing
70	NNBRKBQR	+40	14	D	M	stable
914	BRKRQBNN	+41	13	D	L	stable
883	BRQKRNNB	+41	13	D	L	equalizing
839	RKBNRQNB	+41	13	D	L	volatile
828	RBKNQRBN	+41	13	D	L	stable
730	RKNQBBNR	+41	13	D	L	stable
683	QRKNBNRB	+41	13	D	L	stable
678	QRBKNBNR	+41	13	D	L	equalizing
676	QBBRKNNR	+41	13	D	L	equalizing
667	RNKRBNQB	+41	13	D	L	stable
463	RNNKQRBB	+41	13	D	L	sharpening
280	NBRKBNRQ	+41	13	D	L	equalizing
200	QBNRBKNR	+41	13	D	L	equalizing
148	NBBRNQKR	+41	13	D	L	equalizing
95	NNRKRQBB	+41	13	D	L	stable
958	RKRNNBBQ	+42	11	D	L	stable
936	RBKRBNQN	+42	11	D	L	stable
929	BRKBRNQN	+42	11	D	L	stable
920	RBKRBQNN	+42	11	D	L	stable
908	RBKQRNBN	+42	11	D	L	equalizing
905	RKQBBRNN	+42	11	D	L	stable
895	RQKRNNBB	+42	11	D	L	stable
878	QRKRNBBN	+42	11	D	L	stable
695	RQBKNNRB	+42	11	D	L	sharpening
685	QRKBNNBR	+42	11	D	L	equalizing
680	QBRKBNNR	+42	11	D	L	volatile
587	QRNKBRNB	+42	11	D	L	equalizing
568	RBNKBNRQ	+42	11	D	L	stable
522	RNQKBBNR	+42	11	D	L	stable
181	NRBBNKRQ	+42	11	D	L	stable
100	QBBNRNKR	+42	11	D	L	equalizing
93	NNRBKRBQ	+42	11	D	L	equalizing
24	NBQNBRKR	+42	11	D	L	stable
870	QRBKRBNN	+44	10	D	L	volatile
848	BBRKNRNQ	+43	10	D	L	equalizing
820	RBBKNQRN	+43	10	D	L	stable
744	RBKNBNQR	+43	10	D	L	volatile
681	QRKBBNNR	+43	10	D	L	stable
472	RBNNBKRQ	+43	10	D	L	stable
408	RBQNBNKR	+43	10	D	L	equalizing
336	BBNRKQRN	+43	10	D	L	volatile
317	NQRBKRBN	+43	10	D	L	volatile
289	BQNBRKRN	+43	10	D	L	volatile
271	NRKNQRBB	+43	10	D	L	stable
203	QNRKBNRB	+43	10	D	L	stable
945	BRKBRNNQ	+44	9	D	L	equalizing
768	BBQRKNRN	+44	9	D	L	volatile
262	NRBKNBQR	+43	9	D	L	equalizing
160	BBNRNKQR	+44	9	D	L	stable
56	NBNRBQKR	+44	9	D	L	volatile
950	RKBRNBNQ	+45	8	D	L	equalizing
752	BBRKNNRQ	+45	8	D	L	volatile
504	RBQNBKNR	+45	8	D	L	stable
303	QNRKRNBB	+45	8	D	L	volatile
177	BNRBNKRQ	+45	8	D	L	equalizing
138	NRQNBBKR	+45	8	D	L	volatile
938	RKRNBBQN	+46	7	D	L	stable
934	RKBRNBQN	+47	7	D	L	stable
862	RKNRNBBQ	+46	7	D	L	stable
807	RKBQNRNB	+47	7	D	L	equalizing
799	RQKNRNBB	+47	7	D	L	volatile
793	RQKBBNRN	+47	7	D	L	stable
779	QRKNBRNB	+47	7	D	L	equalizing
605	RQNBKRBN	+47	7	D	L	equalizing
560	BBRNKNRQ	+46	7	D	L	volatile
473	RNNBBKRQ	+47	7	D	L	stable
465	BRNBNKRQ	+46	7	D	L	equalizing
461	RNNBKQBR	+47	7	D	L	sharpening
358	NRBKRBQN	+46	7	D	L	equalizing
314	NQRKBBRN	+46	7	D	L	equalizing
273	BNRBKNRQ	+46	7	D	L	stable
230	NRBQKBNR	+47	7	D	L	equalizing
193	BQNBRKNR	+46	7	D	L	volatile
944	BBRKRNNQ	+48	6	D	L	equalizing
882	BRQKRBNN	+48	6	D	L	volatile
785	BRQBKNRN	+48	6	D	L	stable
783	QRKNRNBB	+48	6	D	L	volatile
602	RQNKBBRN	+48	6	D	L	volatile
565	RNBBKNRQ	+60	6	D	L	equalizing
479	RNNKRQBB	+48	6	D	L	equalizing
379	NRKRBNQB	+48	6	D	L	volatile
251	NRKQBNRB	+48	6	D	L	stable
249	NRKBBQNR	+48	6	D	L	equalizing
864	BBQRKRNN	+49	5	D	L	volatile
845	RKNBRQBN	+49	5	D	L	equalizing
669	RNKBRNBQ	+49	5	D	L	stable
534	RNBKQBNR	+49	5	D	L	equalizing
493	QRNBKNBR	+49	5	D	L	stable
328	NBRQBKRN	+49	5	D	L	equalizing
254	NRKQNBBR	+49	5	D	L	stable
165	NRBBNKQR	+49	5	D	L	equalizing
111	QNRNKRBB	+49	5	D	L	sharpening
61	NNRBQKBR	+49	5	D	L	stable
749	RKNBNQBR	+50	4	D	L	volatile
699	RQKNBNRB	+50	4	D	L	volatile
592	BBRQNKRN	+50	4	D	L	volatile
349	NRKBQRBN	+50	4	D	L	equalizing
333	NRQBKRBN	+50	4	D	L	equalizing
238	NRQKNBBR	+50	4	D	L	equalizing
32	BBNNQRKR	+50	4	D	L	equalizing
927	RKRQNNBB	+52	3	D	L	volatile
886	RQBKRBNN	+58	3	D	L	stable
630	RNBKQBRN	+51	3	D	L	equalizing
399	QRNNKRBB	+65	3	D	L	volatile
373	NRBBKRNQ	+51	3	D	L	equalizing
279	NRBKNRQB	+51	3	D	L	volatile
18	BNQNRBKR	+52	3	D	L	equalizing
941	RKRBNQBN	+54	2	D	L	stable
902	RKBQRBNN	+62	2	D	L	volatile
891	RQKRBNNB	+53	2	D	L	equalizing
792	RBQKBNRN	+55	2	D	L	equalizing
760	RBKNBNRQ	+61	2	D	L	volatile
608	BBRNQKRN	+53	2	D	L	equalizing
591	QRNKRNBB	+54	2	D	L	volatile
316	NBQRKRBN	+56	2	D	L	equalizing
298	QNRKBBRN	+53	2	D	L	equalizing
176	BBNRNKRQ	+53	2	D	L	equalizing
880	BBRQKRNN	+63	1	D	L	equalizing
879	QRKRNNBB	+66	1	D	L	volatile
784	BBRQKNRN	+58	1	D	L	equalizing
620	RBNQKRBN	+63	1	D	L	volatile
578	BQRNKBRN	+56	1	D	L	equalizing
348	NBRKQRBN	+62	1	D	L	equalizing
332	NBRQKRBN	+59	1	D	L	equalizing
272	BBNRKNRQ	+58	1	D	L	volatile
268	NBRKNQBR	+58	1	D	L	equalizing
80	BBNNRKRQ	+83	1	D	L	volatile
935	RKBRNQNB	+78	0	D	L	volatile
868	QBBRKRNN	+75	0	D	L	volatile
794	RQKNBBRN	+67	0	D	L	volatile
604	RBQNKRBN	+81	0	D	L	volatile
557	RNKBNQBR	+63	0	D	L	volatile

How this is measured, in short

Each starting position is analysed once by Stockfish with a fixed budget of search nodes, single-threaded, with a cleared hash — which makes the value reproducible on any machine. The positions are then ranked by how far that value sits from zero, and the rank becomes a 0–100 index.

How this is measured · Open data · Positions

Download: sp_balance.json · sp_balance.csv

Morozov R. Chess960 Balance Index (MBI). ch960.com/balance, 2026. CC BY 4.0.