MESON Chess Problem Database
Problem Display
PID: 156496 (Bn1b1B1n/1rP4K/2k2ppR/2PN4/5PN1/8/4Q3/3R4 w - - 0 1)
Packer, GFH
Hastings Observer, 1931
(First published on Sun Jan 11 1931)
#2
11 + 7
| 15351 | SCPF/BCPS Black Books | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Bxc7
- 2.Sb4#
- 1...Be7
- 2.c8Q#
- 1...Sa6
- 2.Qe8#
- 1...Sd7
- 2.cxd8S#
- 1...Sf7
- 2.cxb8S#
- 1...f5
- 2.Se5#
- 1...g5
- 2.Se5#
- 1...Bxc7
- Tries
- 1.Kg7?
- 1...Bxc7
- 2.Sb4#
- 1...Be7
- 2.c8Q#
- 1...Sa6
- 2.Qe8#
- 1...Sd7
- 2.cxd8S#
- 1...Sf7
- 2.cxb8S#
- 1...f5
- 2.Se5#
- 1...g5
- 2.Se5#
- 1...Kd7!
- 1...Bxc7
- 1.Kg8?
- threat
- 2.cxb8S#
- 1...Bxc7
- 2.Sb4#
- 1...Be7
- 2.c8Q#
- 1...Sa6
- 2.Qe8#
- 1...Sd7
- 2.cxd8S#
- 1...Kd7!
- threat
- 1.Kxh8?
- threat
- 2.cxb8S#
- 1...Bxc7
- 2.Sb4#
- 1...Be7
- 2.c8Q#
- 1...Sa6
- 2.Qe8#
- 1...Sd7
- 2.cxd8S#
- 1...Kd7!
- threat
- 1.Bxb7+?
- 1...Kd7
- 2.cxb8S#
- 2.c8Q#
- 2.c8B#
- 1...Kxb7!
- 1...Kd7
- 1.Rd2?
- 1...Bxc7
- 2.Sb4#
- 1...Be7
- 2.c8Q#
- 1...f5
- 2.Se5#
- 1...Sa6
- 2.Qe8#
- 1...Sd7
- 2.cxd8S#
- 1...Sf7
- 2.cxb8S#
- 1...g5
- 2.Se5#
- 1...Kd7!
- 1...Bxc7
- 1.Rd4?
- 1...Bxc7
- 2.Sb4#
- 1...Be7
- 2.c8Q#
- 1...f5
- 2.Se5#
- 1...Sa6
- 2.Qe8#
- 1...Sd7
- 2.cxd8S#
- 1...Sf7
- 2.cxb8S#
- 1...g5
- 2.Se5#
- 1...Kd7!
- 1...Bxc7
- 1.Qc4?
- threat
- 2.Qa4#
- 1...Be7
- 2.cxb8S#
- 2.c8Q#
- 1...Kd7!
- threat
- 1.Kg7?
- Keys
- 1.f5!
- 1...Kd7
- 2.Qe6#
- 1...Bxc7
- 2.Sb4#
- 1...gxf5
- 2.Se5#
- 1...Be7
- 2.c8Q#
- 1...g5
- 2.Se5#
- 1...Sa6
- 2.Qe8#
- 1...Sd7
- 2.cxd8S#
- 1...Sf7
- 2.cxb8S#
- 1...Kd7
- 1.f5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- B(f);SBLOCK,XP(H)::S(F)
- B(f);N_PINP(H)::P=Q
- S(e);N_GUARD::QAB(B)
- S(e);N_PINP(H),SBLOCK::PXB(f)=S
- S(g);N_PINP(H)::PXS(e)=S
- P(b);N_GUARD,P_SPINP(c)::S(D)
- P(c);P_SPINP(b)::S(D)
- Tries
- Try
- K(I);P-FLIGHT
- Vars
- B(f);SBLOCK,XP(H)::S(F)
- B(f);N_PINP(H)::P=Q
- S(e);N_GUARD::QAB(B)
- S(e);N_PINP(H),SBLOCK::PXB(f)=S
- S(g);N_PINP(H)::PXS(e)=S
- P(b);N_GUARD,P_SPINP(c)::S(D)
- P(c);P_SPINP(b)::S(D)
- Refutation
- K(a);N_PINP(H),N_SPINR(d),S_FLIGHT
- Try
- K(I);N_SPINP(H),S_FLIGHT
- Threat
- PXS(e)=S
- Vars
- B(f);SBLOCK,XP(H)::S(F)
- B(f);N_GUARD::P=Q
- S(e);N_GUARD::QAB(B)
- S(e);SBLOCK::PXB(f)=S
- Refutation
- K(a);N_SPINR(d),S_FLIGHT
- Try
- K(I);N_SPINP(H),P-FLIGHT,XS(g)
- Threat
- PXS(e)=S
- Vars
- B(f);SBLOCK,XP(H)::S(F)
- B(f);N_GUARD::P=Q
- S(e);N_GUARD::QAB(B)
- S(e);SBLOCK::PXB(f)=S
- Refutation
- K(a);N_SPINR(d),S_FLIGHT
- Try
- B(J);CHECK,N_SPINP(H),XR(d)
- Refutation
- K(a);S_FLIGHT,XB(J)
- Try
- R(A);
- Vars
- B(f);SBLOCK,XP(H)::S(F)
- B(f);N_PINP(H)::P=Q
- P(b);N_GUARD,P_SPINP(c)::S(D)
- S(e);N_GUARD::QAB(B)
- S(e);N_PINP(H),SBLOCK::PXB(f)=S
- S(g);N_PINP(H)::PXS(e)=S
- P(c);P_SPINP(b)::S(D)
- Refutation
- K(a);N_PINP(H),N_SPINR(d),S_FLIGHT
- Try
- R(A);
- Vars
- B(f);SBLOCK,XP(H)::S(F)
- B(f);N_PINP(H)::P=Q
- P(b);N_GUARD,P_SPINP(c)::S(D)
- S(e);N_GUARD::QAB(B)
- S(e);N_PINP(H),SBLOCK::PXB(f)=S
- S(g);N_PINP(H)::PXS(e)=S
- P(c);P_SPINP(b)::S(D)
- Refutation
- K(a);N_PINP(H),N_SPINR(d),S_FLIGHT
- Try
- Q(B);
- Threat
- QAB(B)
- Refutation
- K(a);N_PINP(H),N_SPINR(d),S_FLIGHT
- Try
- Actual
- P(C);
- Vars
- K(a);N_PINP(H),N_SPINR(d),S_FLIGHT::QAB1(B)
- B(f);SBLOCK,XP(H)::S(F)
- P(c);P_SPINP(b),XP(C)::S(D)
- B(f);N_PINP(H)::P=Q
- P(c);P_SPINP(b)::S(D)
- S(e);N_GUARD::QAB(B)
- S(e);N_PINP(H),SBLOCK::PXB(f)=S
- S(g);N_PINP(H)::PXS(e)=S
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