MESON Chess Problem Database
Problem Display
PID: 272092 (8/2K4B/2n1p1N1/3k4/3Pr1p1/1n4P1/2RR4/3Q4 w - - 0 1)
Smyth, MB
The Observer, 1960
(First published on Sun Aug 7 1960)
#2
8 + 6
| 17397 | Ling Notebooks | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.Sf4#
- 1...Re2
- 2.Sf4#
- 1...Re3
- 2.Sf4#
- 1...Rxd4
- 2.Qh1#
- 1...Rf4
- 2.Sxf4#
- 1...Re5
- 2.Sf4#
- 1...Sa1
- 2.Rc5#
- 1...Sc1
- 2.Rc5#
- 1...Sba5
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sb4
- 2.Se7#
- 1...Sca5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Sd8
- 2.Se7#
- 1...e5
- 2.Bg8#
- 1...Re1
- Tries
- 1.Rc3?
- threat
- 2.Qxb3#
- 1...Rxd4
- 2.Qh1#
- 1...Sbxd4
- 2.Qb3#
- 1...Re1
- 2.Sf4#
- 1...Re2
- 2.Sf4#
- 1...Re3
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Re5
- 2.Sf4#
- 1...Sa1
- 2.Rc5#
- 1...Sc1
- 2.Rc5#
- 1...Sba5
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sca5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sxd2!
- threat
- 1.Rxc6?
- threat
- 2.Se7#
- 2.Qxb3#
- 1...Rxd4
- 2.Qh1#
- 1...Sxd4
- 2.Qb3#
- 1...Re1
- 2.Sf4#
- 2.Se7#
- 1...Re2
- 2.Sf4#
- 2.Se7#
- 1...Re3
- 2.Sf4#
- 2.Se7#
- 1...Rf4
- 2.Sxf4#
- 2.Se7#
- 1...Re5
- 2.Sf4#
- 2.Se7#
- 1...Sc5
- 2.Rxc5#
- 1...Sa1
- 2.Se7#
- 2.Rc5#
- 1...Sc1
- 2.Se7#
- 2.Rc5#
- 1...Sa5
- 2.Se7#
- 2.Rc5#
- 1...Sxd2!
- threat
- 1.Qe2?
- threat
- 2.Qc4#
- 1...Rxe2
- 2.Sf4#
- 1...Rxd4
- 2.Sf4#
- 2.Qg2#
- 1...Re3
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Re5
- 2.Sf4#
- 1...Sba5
- 2.Rc5#
- 2.Qb5#
- 1...Sca5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sxd2!
- threat
- 1.Qb1?
- threat
- 2.Qxb3#
- 1...Rxd4
- 2.Qh1#
- 1...Sbxd4
- 2.Qa2#
- 2.Qb3#
- 2.Qb5#
- 1...Re1
- 2.Sf4#
- 1...Re2
- 2.Sf4#
- 1...Re3
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Re5
- 2.Sf4#
- 1...Sa1
- 2.Rc5#
- 2.Qb5#
- 1...Sc1
- 2.Rc5#
- 2.Qb5#
- 1...Sba5
- 2.Rc5#
- 2.Qb5#
- 1...Sc5
- 2.Rxc5#
- 1...Sca5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sxd2!
- threat
- 1.Qf1?
- threat
- 2.Qc4#
- 1...Rxd4
- 2.Qg2#
- 2.Qh1#
- 1...Re1
- 2.Sf4#
- 1...Re2
- 2.Sf4#
- 1...Re3
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Re5
- 2.Sf4#
- 1...Sba5
- 2.Rc5#
- 2.Qb5#
- 1...Sca5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sxd2!
- threat
- 1.Rc3?
- Keys
- 1.Qa1!
- 1...Rxd4
- 2.Qh1#
- 1...Sxa1
- 2.Rc5#
- 1...Sxd2
- 2.Rc5#
- 1...Sbxd4
- 2.Qa2#
- 1...Scxd4
- 2.Qa8#
- 1...Re1
- 2.Sf4#
- 1...Re2
- 2.Sf4#
- 1...Re3
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Re5
- 2.Sf4#
- 1...e5
- 2.Bg8#
- 1...Sc1
- 2.Rc5#
- 1...Sba5
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Sb4
- 2.Se7#
- 1...Sca5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Sd8
- 2.Se7#
- 1...Rxd4
- 1.Qa1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::S(F)
- R(b);OGATEB,P_SPINR(b),XP(E)::QAB(A)
- R(b);N_GUARD::S(F),XR(b)
- S(a);N_GUARD::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- S(e);N_GUARD::S(F)
- S(e);N_GUARD::S(F),XS(e)
- P(f);OGATEB::B(H)
- Tries
- Try
- R(B);
- Threat
- QAB(A),XS(a)
- Vars
- R(b);OGATEB,P_SPINR(b),XP(E)::QAB(A)
- S(a);P_SPINS(a),XP(E)::QAB(A)
- R(b);N_GUARD::S(F)
- R(b);N_GUARD::S(F),XR(b)
- S(a);N_GUARD::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- S(e);N_GUARD::S(F)
- Refutation
- S(a);XR(C)
- Try
- R(B);XS(e)
- Threat
- DUALS(2)
- Vars
- R(b);OGATEB,P_SPINR(b),XP(E)::QAB(A)
- S(a);P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::R1(B),XS(a)
- Refutation
- S(a);XR(C)
- Try
- Q(A);
- Threat
- QAB1(A)
- Vars
- R(b);N_GUARD,XQ(A)::S(F)
- R(b);N_GUARD::S(F)
- R(b);N_GUARD::S(F),XR(b)
- S(e);N_GUARD::S(F)
- Refutation
- S(a);XR(C)
- Try
- Q(A);
- Threat
- QAB(A),XS(a)
- Vars
- R(b);OGATEB,P_SPINR(b),XP(E)::QAB(A)
- R(b);N_GUARD::S(F)
- R(b);N_GUARD::S(F),XR(b)
- S(a);N_GUARD::R1(B),XS(a)
- S(e);N_GUARD::S(F)
- Refutation
- S(a);XR(C)
- Try
- Q(A);
- Threat
- QAB1(A)
- Vars
- R(b);N_GUARD::S(F)
- R(b);N_GUARD::S(F),XR(b)
- S(e);N_GUARD::S(F)
- Refutation
- S(a);XR(C)
- Try
- Actual
- Q(A);
- Vars
- R(b);OGATEB,P_SPINR(b),XP(E)::QAB(A)
- S(a);N_GUARD,XQ(A)::R1(B)
- S(a);N_GUARD,XR(C)::R1(B)
- S(a);OGATEB,P_SPINS(a),XP(E)::QAB(A)
- S(e);OGATEB,P_SPINS(e),XP(E)::QAB(A)
- R(b);N_GUARD::S(F)
- R(b);N_GUARD::S(F),XR(b)
- P(f);OGATEB::B(H)
- S(a);N_GUARD::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- S(e);N_GUARD::S(F)
- S(e);N_GUARD::S(F),XS(e)
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