MESON Chess Problem Database
Problem Display
PID: 156440 (2Bn4/3Q3p/r7/2pNkpP1/R1n4R/B2p4/K1N3p1/5bb1 w - - 0 1)
Lewis, Brian Noel
The Observer, 1951
(First published on Sun Feb 11 1951)
#2
9 + 11
| 56 | The Problemist | 2014 |
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rd6
- 2.Qxf5#
- 1...Se3
- 2.Bb2#
- 1...Sc6
- 2.Qe6#
- 1...Rd6
- Tries
- 1.Sc3?
- threat
- 2.Qd5#
- 1...Rd6
- 2.Qxf5#
- 1...Sb6
- 2.Qc7#
- 1...Sd6
- 2.Qg7#
- 1...Se3!
- threat
- 1.Sde3?
- threat
- 2.Sxc4#
- 2.Qd5#
- 1...Rxa4
- 2.Qd5#
- 1...Sxa3
- 2.Qd5#
- 1...Sxe3
- 2.Bb2#
- 1...dxc2
- 2.Qd5#
- 1...f4
- 2.Qd5#
- 1...Rd6
- 2.Qxf5#
- 1...Sb2
- 2.Bxb2#
- 2.Qd5#
- 1...Sd2
- 2.Bb2#
- 2.Qd5#
- 1...Sa5
- 2.Bb2#
- 2.Qd5#
- 1...Sb6
- 2.Bb2#
- 2.Qc7#
- 1...Sd6
- 2.Bb2#
- 2.Qg7#
- 1...d2
- 2.Qd5#
- 1...Bxe3!
- threat
- 1.Sdb4?
- threat
- 2.Qd5#
- 1...Rd6
- 2.Qxf5#
- 1...Se3
- 2.Bb2#
- 1...Sb6
- 2.Qc7#
- 1...Sd6
- 2.Qg7#
- 1...cxb4!
- threat
- 1.Sc7?
- threat
- 2.Qd5#
- 1...Rd6
- 2.Qxf5#
- 1...Se3
- 2.Bb2#
- 1...Sd6
- 2.Qg7#
- 1...Sb6!
- threat
- 1.Se7?
- threat
- 2.Qd5#
- 1...Rd6
- 2.Qxf5#
- 1...Se3
- 2.Bb2#
- 1...Sb6
- 2.Qc7#
- 1...Sd6!
- threat
- 1.Rxa6?
- threat
- 2.Qxf5#
- 1...Sd6
- 2.Qxd6#
- 1...f4
- 2.Qf5#
- 1...Se3
- 2.Bb2#
- 2.Qd6#
- 1...Sc6
- 2.Qe6#
- 1...Se6
- 2.Rxe6#
- 2.Qxe6#
- 1...Sb6!
- threat
- 1.Re4+?
- 1...Kxe4
- 2.Qxf5#
- 1...fxe4!
- 1...Kxe4
- 1.Sc3?
- Keys
- 1.Sf4!
- threat
- 2.Qd5#
- 1...Ke4
- 2.Qd5#
- 1...Rd6
- 2.Qxf5#
- 1...Se3
- 2.Bb2#
- 1...Sb6
- 2.Qc7#
- 1...Sd6
- 2.Qg7#
- threat
- 1.Sf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- R(i);SBLOCK::QAR1(H),XP(h)
- S(e);N_GUARD,S_CUTB(b)::B(C)
- S(k);N_GUARD,S_CUTR(i)::QAR1(H)
- Tries
- Try
- S(F);
- Threat
- QAR1(H)
- Vars
- R(i);SBLOCK::QAR1(H),XP(h)
- S(e);N_GUARD,S_CUTR(i)::QAB(H)
- S(e);SBLOCK,S_CUTR(i)::QAB(H)
- Refutation
- S(e);
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- R(i);P_PINB(C),XR(D)::QAR1(H)
- S(e);XB(C)::QAR1(H)
- S(e);N_GUARD,XS(F)::B(C)
- P(d);XS(B)::QAR1(H)
- P(h);::QAR1(H)
- R(i);SBLOCK::QAR1(H),XP(h)
- P(d);::QAR1(H)
- Refutation
- B(b);XS(F)
- Try
- S(F);
- Threat
- QAR1(H)
- Vars
- R(i);SBLOCK::QAR1(H),XP(h)
- S(e);N_GUARD,S_CUTB(b)::B(C)
- S(e);N_GUARD,S_CUTR(i)::QAB(H)
- S(e);SBLOCK,S_CUTR(i)::QAB(H)
- Refutation
- P(f);XS(F)
- Try
- S(F);
- Threat
- QAR1(H)
- Vars
- R(i);SBLOCK::QAR1(H),XP(h)
- S(e);N_GUARD,S_CUTB(b)::B(C)
- S(e);SBLOCK,S_CUTR(i)::QAB(H)
- Refutation
- S(e);
- Try
- S(F);
- Threat
- QAR1(H)
- Vars
- R(i);SBLOCK::QAR1(H),XP(h)
- S(e);N_GUARD,S_CUTB(b)::B(C)
- S(e);N_GUARD,S_CUTR(i)::QAB(H)
- Refutation
- S(e);
- Try
- R(D);XR(i)
- Threat
- QAR1(H),XP(h)
- Vars
- S(e);N_GUARD::QAB1(H),XS(e)
- P(h);::QAR1(H)
- S(k);N_GUARD::QAR1(H)
- Refutation
- S(e);
- Try
- R(E);CHECK
- Vars
- K(g);P-FLIGHT,P_SPINS(e),XR(E)::QAB1(H),XP(h)
- Refutation
- P(h);XR(E)
- Try
- Actual
- S(F);
- Threat
- QAR1(H)
- Vars
- K(g);P-FLIGHT,P_SPINS(e)::QAB1(H)
- R(i);SBLOCK::QAR1(H),XP(h)
- S(e);N_GUARD,S_CUTB(b)::B(C)
- S(e);N_GUARD,S_CUTR(i)::QAB(H)
- S(e);SBLOCK,S_CUTR(i)::QAB(H)
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