MESON Chess Problem Database
Problem Display
PID: 154058 (B2N4/1r1Pp3/b5Rp/1pQ1Nk1r/1P1p3p/7P/4R1P1/2K5 w - - 0 1)
Harley, Brian
Sprague, Gordon
The Observer, 1953
(First published on Sun Nov 15 1953)
#2
11 + 9
| 15290 | Harley Scrapbook | 2015 |
| 56 | The Problemist | 2015 |
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Kf4
- 2.Sd3#
- 1...Rb6
- 2.Rf2#
- 1...Ra7
- 2.Rf2#
- 1...Rc7
- 2.Rf2#
- 1...Rxd7
- 2.Rf2#
- 1...Rb8
- 2.Rf2#
- 1...d3
- 2.Qf2#
- 1...e6
- 2.Qf8#
- 1...Kf4
- Tries
- 1.Kb1?
- 1...Kf4
- 2.Sd3#
- 1...Rxd7
- 2.Rf2#
- 1...Rb6
- 2.Rf2#
- 1...Ra7
- 2.Rf2#
- 1...Rc7
- 2.Rf2#
- 1...Rb8
- 2.Rf2#
- 1...d3
- 2.Qf2#
- 1...e6
- 2.Qf8#
- 1...Rg5!
- 1...Kf4
- 1.Kd1?
- 1...Kf4
- 2.Sd3#
- 1...Rxd7
- 2.Rf2#
- 1...Rb6
- 2.Rf2#
- 1...Ra7
- 2.Rf2#
- 1...Rc7
- 2.Rf2#
- 1...Rb8
- 2.Rf2#
- 1...d3
- 2.Qf2#
- 1...e6
- 2.Qf8#
- 1...Rg5!
- 1...Kf4
- 1.Kb2?
- 1...Kf4
- 2.Sd3#
- 1...Rxd7
- 2.Rf2#
- 1...Rb6
- 2.Rf2#
- 1...Ra7
- 2.Rf2#
- 1...Rc7
- 2.Rf2#
- 1...Rb8
- 2.Rf2#
- 1...d3
- 2.Qf2#
- 1...e6
- 2.Qf8#
- 1...Rg5!
- 1...Kf4
- 1.Kd2?
- 1...Kf4
- 2.Sd3#
- 1...Rxd7
- 2.Rf2#
- 1...Rb6
- 2.Rf2#
- 1...Ra7
- 2.Rf2#
- 1...Rc7
- 2.Rf2#
- 1...Rb8
- 2.Rf2#
- 1...d3
- 2.Qf2#
- 1...e6
- 2.Qf8#
- 1...Rg5!
- 1...Kf4
- 1.Se6?
- 1...Rxd7
- 2.Be4#
- 2.Rf2#
- 1...Rb6
- 2.Be4#
- 2.Rf2#
- 1...Ra7
- 2.Be4#
- 2.Rf2#
- 1...Rc7
- 2.Be4#
- 2.Rf2#
- 1...Rb8
- 2.Be4#
- 2.Rf2#
- 1...d3
- 2.Qf2#
- 1...Rg5!
- 1...Rxd7
- 1.Bxb7?
- threat
- 2.Rf2#
- 1...Kf4
- 2.Sd3#
- 1...Bxb7!
- threat
- 1.Re1?
- 1...Kf4
- 2.Sd3#
- 1...Rxd7
- 2.Rf1#
- 1...Rb6
- 2.Rf1#
- 1...Ra7
- 2.Rf1#
- 1...Rc7
- 2.Rf1#
- 1...Rb8
- 2.Rf1#
- 1...d3
- 2.Qf2#
- 1...e6
- 2.Qf8#
- 1...Rg5!
- 1...Kf4
- 1.Rg7?
- 1...Kf4
- 2.Sd3#
- 1...Rxd7
- 2.Rf2#
- 1...Rg5
- 2.Rf7#
- 1...Rb6
- 2.Rf2#
- 1...Ra7
- 2.Rf2#
- 1...Rc7
- 2.Rf2#
- 1...Rb8
- 2.Rf2#
- 1...d3
- 2.Qf2#
- 1...e6
- 2.Qf8#
- 1...Kf6!
- 1...Kf4
- 1.Qxd4?
- threat
- 2.Rf2#
- 2.Qf2#
- 2.Qe4#
- 2.Qg4#
- 1...Rg5
- 2.Rf2#
- 2.Qf2#
- 2.Qe4#
- 1...Rc7+!
- threat
- 1.Qc2+?
- 1...Kf4
- 2.Se6#
- 2.Rg4#
- 2.Qe4#
- 1...d3!
- 1...Kf4
- 1.Qd5?
- threat
- 2.Rf2#
- 2.Qf3#
- 2.Qe4#
- 2.Qf7#
- 1...Kf4
- 2.Sd3#
- 2.Qf3#
- 2.Qe4#
- 1...Rb6
- 2.Rf2#
- 2.Qf3#
- 2.Qe4#
- 1...e6
- 2.Rf2#
- 2.Qf3#
- 2.Qe4#
- 1...Rc7+!
- threat
- 1.Qc6?
- threat
- 2.Qf3#
- 2.Qe4#
- 1...Kf4
- 2.Qf3#
- 2.Qe4#
- 1...Rc7!
- threat
- 1.Kb1?
- Keys
- 1.Rg8!
- 1...Kf4
- 2.Sd3#
- 1...Kf6
- 2.Sg4#
- 1...Rxd7
- 2.Rf2#
- 1...Rg5
- 2.Rf8#
- 1...Rb6
- 2.Rf2#
- 1...Ra7
- 2.Rf2#
- 1...Rc7
- 2.Rf2#
- 1...Rb8
- 2.Rf2#
- 1...d3
- 2.Qf2#
- 1...e6
- 2.Qf8#
- 1...Kf4
- 1.Rg8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- K(d);P-FLIGHT::S(G)
- R(h);::R(B)
- R(h);P_PINQ(F)::R(B)
- R(h);XP(I)::R(B)
- P(a);OGATE::QAR(F)
- P(i);OGATE::QAR(F)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- K(d);P-FLIGHT::S(G)
- R(h);XP(I)::R(B)
- R(h);::R(B)
- P(a);OGATE::QAR(F)
- P(i);OGATE::QAR(F)
- Refutation
- R(e);
- Try
- K(A);P-FLIGHT
- Vars
- K(d);P-FLIGHT::S(G)
- R(h);XP(I)::R(B)
- R(h);::R(B)
- P(a);OGATE::QAR(F)
- P(i);OGATE::QAR(F)
- Refutation
- R(e);
- Try
- K(A);S_FLIGHT
- Vars
- K(d);P-FLIGHT::S(G)
- R(h);XP(I)::R(B)
- R(h);::R(B)
- P(a);OGATE::QAR(F)
- P(i);OGATE::QAR(F)
- Refutation
- R(e);
- Try
- K(A);S_FLIGHT
- Vars
- K(d);P-FLIGHT::S(G)
- R(h);XP(I)::R(B)
- R(h);::R(B)
- P(a);OGATE::QAR(F)
- P(i);OGATE::QAR(F)
- Refutation
- R(e);
- Try
- S(K);
- Vars
- P(a);OGATE::QAR(F)
- Refutation
- R(e);
- Try
- B(J);XR(h)
- Threat
- R(B)
- Vars
- K(d);P-FLIGHT::S(G)
- Refutation
- B(f);XB(J)
- Try
- R(B);
- Vars
- K(d);P-FLIGHT::S(G)
- R(h);XP(I)::R(B)
- R(h);::R(B)
- R(h);P_PINQ(F)::R(B)
- P(a);OGATE::QAR(F)
- P(i);OGATE::QAR(F)
- Refutation
- R(e);
- Try
- R(H);
- Vars
- K(d);P-FLIGHT::S(G)
- R(h);XP(I)::R(B)
- R(e);SBLOCK::R(H)
- R(h);::R(B)
- R(h);P_PINQ(F)::R(B)
- P(a);OGATE::QAR(F)
- P(i);OGATE::QAR(F)
- Refutation
- K(d);P-FLIGHT
- Try
- Q(F);XP(a)
- Threat
- DUALS(4)
- Refutation
- R(h);CHECK
- Try
- Q(F);CHECK
- Refutation
- P(a);P_SPINP(a)
- Try
- Q(F);
- Threat
- DUALS(4)
- Refutation
- R(h);CHECK
- Try
- Q(F);
- Threat
- DUALS(2)
- Refutation
- R(h);P_PINQ(F)
- Try
- Actual
- R(H);
- Vars
- K(d);P-FLIGHT::S(G)
- R(h);XP(I)::R(B)
- R(e);SBLOCK::R(H)
- R(h);::R(B)
- R(h);P_PINQ(F)::R(B)
- P(a);OGATE::QAR(F)
- P(i);OGATE::QAR(F)
Developed and maintained by Brian Stephenson.
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