MESON Chess Problem Database
Problem Display
PID: 42635 (7b/r1p2Q2/q7/p1BNk1p1/7n/1p4P1/1K1R1N2/8 w - - 0 1)
Rukhlis, Efim Naumovich
1st HM., BCPS-40 JT, 1958-1960
#2
7 + 9
| 3749 | FIDE Album (1959-1961) | 1966 |
| 12701 | Brazilian Solving Championship | 2002-2003 |
| 5405 | Chess Solving Yearbook 2003 | 2004 |
| 133 | The Problemist Supplement | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Qe2
- 2.Rxe2#
- 1...Qb7
- 2.Re2#
- 1...Qc8
- 2.Re2#
- 1...Qb6
- 2.Re2#
- 1...Qc6
- 2.Re2#
- 1...Qd6
- 2.Bd4#
- 2.Re2#
- 1...Qh6
- 2.Re2#
- 1...Qe2
- Tries
- 1.Sc3?
- threat
- 2.Sg4#
- 2.Rd5#
- 1...Qf6
- 2.Rd5#
- 2.Qd5#
- 1...Bf6
- 2.Rd5#
- 2.Qd5#
- 1...Qe2
- 2.Rxe2#
- 1...Qd3
- 2.Sxd3#
- 2.Sg4#
- 1...Qb7
- 2.Sd3#
- 2.Sg4#
- 1...Qc8
- 2.Sd3#
- 2.Re2#
- 2.Rd5#
- 1...Qc6
- 2.Sd3#
- 2.Sg4#
- 1...Qd6
- 2.Sg4#
- 2.Re2#
- 1...Qe6
- 2.Sd3#
- 2.Re2#
- 1...g4
- 2.Sxg4#
- 2.Rd5#
- 1...c6
- 2.Sg4#
- 2.Bd6#
- 1...Qc4!
- threat
- 1.Se3?
- threat
- 2.Seg4#
- 2.Rd5#
- 1...Qe2
- 2.Qe7#
- 1...Qd3
- 2.Seg4#
- 2.Qe7#
- 1...Qc4
- 2.Sxc4#
- 1...Qb7
- 2.Sc4#
- 2.Seg4#
- 2.Qe7#
- 1...Qc8
- 2.Sc4#
- 2.Rd5#
- 1...Qc6
- 2.Sc4#
- 2.Seg4#
- 1...Qd6
- 2.Sc4#
- 2.Seg4#
- 1...Qf6
- 2.Rd5#
- 2.Qd5#
- 1...Bf6
- 2.Rd5#
- 2.Qd5#
- 1...g4
- 2.Sexg4#
- 2.Rd5#
- 1...c6
- 2.Seg4#
- 2.Bd6#
- 1...Qe6!
- threat
- 1.Sf4?
- threat
- 2.Rd5#
- 1...Qe2
- 2.Rxe2#
- 2.Qe6#
- 1...Qd3
- 2.S4xd3#
- 2.Qe6#
- 1...Qb7
- 2.S4d3#
- 2.Qe6#
- 1...Qc6
- 2.S4d3#
- 1...Qd6
- 2.Re2#
- 1...Qe6
- 2.Re2#
- 2.Qxe6#
- 1...c6
- 2.Bd6#
- 2.Qe6#
- 1...Qc4!
- threat
- 1.Sb6?
- threat
- 2.Sd7#
- 2.Rd5#
- 1...Qxb6
- 2.Re2#
- 2.Rd5#
- 1...cxb6
- 2.Bd6#
- 2.Rd5#
- 1...Bf6
- 2.Rd5#
- 2.Qd5#
- 1...Qc4
- 2.Sxc4#
- 2.Sd7#
- 1...Qe2
- 2.Sd7#
- 2.Rxe2#
- 1...Qb5
- 2.Rd5#
- 1...Qb7
- 2.Sc4#
- 2.Sd7#
- 1...Qc8
- 2.Sc4#
- 2.Re2#
- 2.Rd5#
- 1...c6
- 2.Bd6#
- 1...Qd3!
- threat
- 1.Sf6?
- threat
- 2.S6g4#
- 2.Sd7#
- 2.Rd5#
- 1...Kf5
- 2.Rd5#
- 1...Qxf6
- 2.Rd5#
- 2.Qd5#
- 1...Bxf6
- 2.Rd5#
- 2.Qd5#
- 1...Qc4
- 2.Sd7#
- 1...Qe2
- 2.Sd7#
- 1...Qd3
- 2.S6g4#
- 1...Qb5
- 2.S6g4#
- 2.Rd5#
- 1...Qb7
- 2.S6g4#
- 2.Sd7#
- 1...Qc8
- 2.Rd5#
- 1...Qc6
- 2.S6g4#
- 1...Qd6
- 2.S6g4#
- 1...g4
- 2.S6xg4#
- 2.Sd7#
- 2.Rd5#
- 1...c6
- 2.S6g4#
- 1...Qe6!
- threat
- 1.Sxc7?
- threat
- 2.Rd5#
- 1...Qc4
- 2.Bd6#
- 1...Qe2
- 2.Bd6#
- 2.Rxe2#
- 2.Qe6#
- 1...Qd3
- 2.Qe6#
- 1...Qb7
- 2.Bd6#
- 2.Qe6#
- 1...Qd6
- 2.Bxd6#
- 2.Re2#
- 1...Qe6
- 2.Re2#
- 2.Qxe6#
- 1...Qc6!
- threat
- 1.Se7?
- threat
- 2.Rd5#
- 1...Qc4
- 2.Sc6#
- 1...Qe2
- 2.Sc6#
- 2.Rxe2#
- 1...Qd3
- 2.Sc6#
- 1...Qc6
- 2.Sxc6#
- 1...Qd6
- 2.Re2#
- 1...Qe6
- 2.Re2#
- 1...c6
- 2.Bd6#
- 1...Qb7!
- threat
- 1.Sc3?
- Keys
- 1.Sb4!
- threat
- 2.Rd5#
- 1...Qe2
- 2.Sc6#
- 2.Rxe2#
- 1...Qd3
- 2.Sbxd3#
- 2.Sc6#
- 1...Qc4
- 2.Sc6#
- 1...Qb7
- 2.Sbd3#
- 1...Qc6
- 2.Sbd3#
- 2.Sxc6#
- 1...Qd6
- 2.Re2#
- 1...Qe6
- 2.Re2#
- 1...c6
- 2.Bd6#
- threat
- 1.Sb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- Q(f);N_GUARD,P_PINR(B)::R(B),XQ(f)
- Q(f);N_GUARD::R(B)
- Tries
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD,P_PINR(B)::R(B),XQ(f)
- Refutation
- Q(f);
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD,P_PINR(B)::QAR2(G)
- Q(f);N_GUARD::S(F),XQ(f)
- Refutation
- Q(f);
- Try
- S(F);
- Threat
- R1(B)
- Vars
- Q(f);N_GUARD::S(F)
- Q(f);N_GUARD::R(B)
- Refutation
- Q(f);
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- Q(f);::R1(B)
- P(h);N_GUARD::B(E)
- Refutation
- Q(f);
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- K(d);P-FLIGHT,P_PINS(F)::R(B)
- Q(f);::S(F)
- Q(f);P_PINR(B)::S(F)
- Q(f);::R1(B)
- P(h);::S(F)
- Refutation
- Q(f);
- Try
- S(F);XP(h)
- Threat
- R1(B)
- Vars
- Q(f);N_GUARD::B(E)
- Q(f);N_GUARD::QAR1(G)
- Refutation
- Q(f);
- Try
- S(F);
- Threat
- R1(B)
- Vars
- Q(f);N_GUARD::S(F)
- Q(f);N_GUARD::S(F),XQ(f)
- Q(f);N_GUARD::R(B)
- P(h);N_GUARD,S_CUTQ(f)::B(E)
- Refutation
- Q(f);
- Try
- Actual
- S(F);
- Threat
- R1(B)
- Vars
- Q(f);N_GUARD::S(F)
- Q(f);N_GUARD::R(B)
- P(h);N_GUARD,S_CUTQ(f)::B(E)
Developed and maintained by Brian Stephenson.
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CSS/Javascript (jQuery, Bootstrap & DataTables).