MESON Chess Problem Database
Problem Display
PID: 56245 (4nRnN/2p2P2/2Rppk1p/3Pr2p/3Q3K/7p/7B/8 w - - 0 1)
Howard, Kenneth Samuel
The Observer, 1925
(First published on Sun Nov 15 1925)
#2
8 + 10
| 5089 | The Enjoyment of Chess Problems | 1943 |
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Kf5
- 2.Qf4#
- 1...Ke7
- 2.fxe8Q#
- 1...Kg7
- 2.fxg8Q#
- 1...Sg7
- 2.fxg8S#
- 1...Se7
- 2.fxe8S#
- 1...exd5
- 2.Qxe5#
- 1...Kf5
- Tries
- 1.Bg3?
- 1...Kf5
- 2.Qf4#
- 1...Ke7
- 2.fxe8Q#
- 1...Kg7
- 2.fxg8Q#
- 1...exd5
- 2.Qxe5#
- 1...Sg7
- 2.fxg8S#
- 1...Se7
- 2.fxe8S#
- 1...h2!
- 1...Kf5
- 1.Bxe5+?
- 1...Kf5
- 2.Qf4#
- 1...Ke7
- 2.fxe8Q#
- 1...dxe5!
- 1...Kf5
- 1.Rxc7?
- threat
- 2.fxe8Q#
- 2.fxe8S#
- 2.fxe8B#
- 2.fxe8R#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Kf5
- 2.Qf4#
- 1...Kg7
- 2.fxg8Q#
- 2.fxg8R#
- 1...exd5
- 2.fxe8Q#
- 2.fxe8R#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sg7
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Se7
- 2.fxe8S#
- 1...Sxc7!
- threat
- 1.Rxe8?
- threat
- 2.f8Q#
- 1...Kf5
- 2.Qf4#
- 1...Kg7!
- threat
- 1.Rxg8?
- threat
- 2.f8Q#
- 1...Kf5
- 2.Qf4#
- 1...exd5
- 2.Qxe5#
- 1...Ke7!
- threat
- 1.Qa1?
- 1...Ke7
- 2.fxe8Q#
- 1...Kg7
- 2.fxg8Q#
- 1...exd5
- 2.Qxe5#
- 1...Sg7
- 2.fxg8S#
- 1...Se7
- 2.fxe8S#
- 1...Kf5!
- 1...Ke7
- 1.Qb2?
- 1...Ke7
- 2.fxe8Q#
- 1...Kg7
- 2.fxg8Q#
- 1...exd5
- 2.Qxe5#
- 1...Sg7
- 2.fxg8S#
- 1...Se7
- 2.fxe8S#
- 1...Kf5!
- 1...Ke7
- 1.Qf2+?
- 1...Ke7
- 2.fxe8Q#
- 1...Kg7
- 2.fxg8Q#
- 1...Rf5!
- 1...Ke7
- 1.Qxe5+?
- 1...Ke7
- 2.fxe8Q#
- 1...dxe5!
- 1...Ke7
- 1.Qf4+?
- 1...Ke7
- 2.fxe8Q#
- 1...Kg7
- 2.fxg8Q#
- 1...Rf5!
- 1...Ke7
- 1.Bg3?
- Keys
- 1.Qc3!
- 1...Kf5
- 2.Qf3#
- 1...Ke7
- 2.fxe8Q#
- 1...Kg7
- 2.fxg8Q#
- 1...exd5
- 2.Qxe5#
- 1...Sg7
- 2.fxg8S#
- 1...Se7
- 2.fxe8S#
- 1...Kf5
- 1.Qc3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- K(f);N_SPINR(b),P-FLIGHT::QAR1(B)
- K(f);N_SPINR(b),S_FLIGHT::PXS(i)=Q
- K(f);S_FLIGHT::PXS(j)=Q
- S(i);SBLOCK::PXS(j)=S
- S(j);SBLOCK::PXS(i)=S
- P(e);P_SPINP(d),XP(D)::QAB1(B),XR(b)
- Tries
- Try
- B(A);
- Vars
- K(f);N_SPINR(b),P-FLIGHT::QAR1(B)
- K(f);N_SPINR(b),S_FLIGHT::PXS(i)=Q
- K(f);S_FLIGHT::PXS(j)=Q
- P(e);P_SPINP(d),XP(D)::QAB1(B),XR(b)
- S(i);SBLOCK::PXS(j)=S
- S(j);SBLOCK::PXS(i)=S
- Refutation
- P(a);
- Try
- B(A);CHECK,XR(b)
- Vars
- K(f);P-FLIGHT::QAR1(B)
- K(f);S_FLIGHT::PXS(i)=Q
- Refutation
- P(d);P_SPINP(d),XB(A)
- Try
- R(E);XP(h)
- Threat
- DUALS(8)
- Vars
- K(f);N_SPINR(b),P-FLIGHT::QAR1(B)
- K(f);S_FLIGHT::PXS(j)=Q
- S(j);::PXS(i)=S
- Refutation
- S(i);XR(E)
- Try
- R(G);XS(i)
- Threat
- P=Q
- Vars
- K(f);N_SPINR(b),P-FLIGHT::QAR1(B)
- Refutation
- K(f);S_FLIGHT
- Try
- R(G);XS(j)
- Threat
- P=Q
- Vars
- K(f);N_SPINR(b),P-FLIGHT::QAR1(B)
- P(e);P_SPINP(d),XP(D)::QAB1(B),XR(b)
- Refutation
- K(f);N_SPINR(b),S_FLIGHT
- Try
- Q(B);
- Vars
- K(f);N_SPINR(b),S_FLIGHT::PXS(i)=Q
- K(f);S_FLIGHT::PXS(j)=Q
- P(e);P_SPINP(d),XP(D)::QAB1(B),XR(b)
- S(i);SBLOCK::PXS(j)=S
- S(j);SBLOCK::PXS(i)=S
- Refutation
- K(f);N_SPINR(b),P-FLIGHT
- Try
- Q(B);
- Vars
- K(f);N_SPINR(b),S_FLIGHT::PXS(i)=Q
- K(f);S_FLIGHT::PXS(j)=Q
- P(e);P_SPINP(d),XP(D)::QAB1(B),XR(b)
- S(i);SBLOCK::PXS(j)=S
- S(j);SBLOCK::PXS(i)=S
- Refutation
- K(f);N_SPINR(b),P-FLIGHT
- Try
- Q(B);CHECK,N_PINR(b)
- Vars
- K(f);S_FLIGHT::PXS(i)=Q
- K(f);S_FLIGHT::PXS(j)=Q
- Refutation
- R(b);P_SPINR(b)
- Try
- Q(B);CHECK,XR(b)
- Vars
- K(f);P_SPINP(e),S_FLIGHT::PXS(i)=Q
- Refutation
- P(d);P_SPINP(e),XQ(B)
- Try
- Q(B);CHECK,N_PINR(b)
- Vars
- K(f);S_FLIGHT::PXS(i)=Q
- K(f);S_FLIGHT::PXS(j)=Q
- Refutation
- R(b);P_SPINR(b)
- Try
- Actual
- Q(B);
- Vars
- K(f);N_SPINR(b),P-FLIGHT::QAR2(B)
- K(f);N_SPINR(b),S_FLIGHT::PXS(i)=Q
- K(f);S_FLIGHT::PXS(j)=Q
- P(e);P_SPINP(d),XP(D)::QAB1(B),XR(b)
- S(i);SBLOCK::PXS(j)=S
- S(j);SBLOCK::PXS(i)=S
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).