MESON Chess Problem Database
Problem Display
PID: 154005 (8/nN4K1/1p2ppp1/1n2kbr1/2Q2pBB/3P4/2N5/8 w - - 0 1)
Coward, John R
Harley, Brian
The Observer, 1953
(First published on Sun Mar 8 1953)
#2
7 + 10
| 15290 | Harley Scrapbook | 2014 |
| 56 | The Problemist | 2015 |
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxg4
- 2.Bxf6#
- 1...Rh5
- 2.Bxf6#
- 1...Bxd3
- 2.Qxe6#
- 1...Be4
- 2.Qxe6#
- 2.Qxe4#
- 1...Bxg4
- 2.Qe4#
- 1...Sa3
- 2.Qd4#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sd6
- 2.Qd4#
- 1...Sc7
- 2.Qd4#
- 1...Sc6
- 2.Qxb5#
- 1...Sc8
- 2.Qxb5#
- 1...f3
- 2.Bg3#
- 1...Rxg4
- Tries
- 1.Kf7?
- 1...Rxg4
- 2.Bxf6#
- 1...Bxd3
- 2.Qxe6#
- 1...Bxg4
- 2.Qe4#
- 1...Rh5
- 2.Bxf6#
- 1...Be4
- 2.Qxe6#
- 2.Qxe4#
- 1...Sa3
- 2.Qd4#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sc7
- 2.Qd4#
- 1...Sc6
- 2.Qxb5#
- 1...Sc8
- 2.Qxb5#
- 1...f3
- 2.Bg3#
- 1...Sd6+!
- 1...Rxg4
- 1.Se1?
- threat
- 2.Sf3#
- 1...Bxg4
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...f3
- 2.Sxf3#
- 2.Bg3#
- 1...Sd4!
- threat
- 1.Bf3?
- 1...Bh3
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bg4
- 2.Qe4#
- 1...Rh5
- 2.Bxf6#
- 1...Rg1
- 2.Bxf6#
- 1...Rg2
- 2.Bxf6#
- 1...Rg3
- 2.Bxf6#
- 1...Rg4
- 2.Bxf6#
- 1...Sa3
- 2.Qc3#
- 2.Qd4#
- 2.Qc7#
- 2.d4#
- 1...Sc3
- 2.Qxc3#
- 2.Qd4#
- 2.Qc7#
- 2.d4#
- 1...Sd4
- 2.Qxd4#
- 2.Qc7#
- 1...Sd6
- 2.Qc3#
- 2.Qd4#
- 2.d4#
- 1...Sc7
- 2.Qc3#
- 2.Qd4#
- 2.Qxc7#
- 2.d4#
- 1...Sc6
- 2.Qxb5#
- 1...Sc8
- 2.Qxb5#
- 1...Bxd3!
- 1...Bh3
- 1.Bh3?
- 1...Bxd3
- 2.Qxe6#
- 1...Bxh3
- 2.Qe4#
- 1...Bg4
- 2.Qe4#
- 1...Rh5
- 2.Bxf6#
- 1...Rg1
- 2.Bxf6#
- 1...Rg2
- 2.Bxf6#
- 1...Rg3
- 2.Bxf6#
- 1...Rg4
- 2.Bxf6#
- 1...Be4
- 2.Qxe6#
- 2.Qxe4#
- 1...Sa3
- 2.Qd4#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sd6
- 2.Qd4#
- 1...Sc7
- 2.Qd4#
- 1...Sc6
- 2.Qxb5#
- 1...Sc8
- 2.Qxb5#
- 1...f3!
- 1...Bxd3
- 1.Bxg5?
- threat
- 2.Bxf4#
- 2.Bxf6#
- 1...Bxg4
- 2.Qe4#
- 1...Be4
- 2.Bxf6#
- 2.Qxe6#
- 2.Qxe4#
- 1...Sd4
- 2.Bxf6#
- 2.Qxd4#
- 1...f3
- 2.Bf4#
- 2.Bxf6#
- 1...fxg5!
- threat
- 1.Qc3+?
- 1...Kd5
- 2.Sb4#
- 1...Sd4
- 2.Qxd4#
- 1...Sxc3!
- 1...Kd5
- 1.Qxf4+?
- 1...Kd5
- 2.Sb4#
- 1...Kxf4!
- 1...Kd5
- 1.Qc6?
- 1...Rxg4
- 2.Bxf6#
- 1...Bxd3
- 2.Qxe6#
- 1...Bxg4
- 2.Qe4#
- 1...f3
- 2.Bg3#
- 1...Rh5
- 2.Bxf6#
- 1...Be4
- 2.Qxe4#
- 2.Qxe6#
- 1...Sa3
- 2.Qd6#
- 2.d4#
- 1...Sc3
- 2.Qd6#
- 2.d4#
- 1...Sd4
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 2.d4#
- 1...Sc7
- 2.Qd6#
- 2.d4#
- 1...Sc8
- 2.Qxb5#
- 1...Sxc6!
- 1...Rxg4
- 1.d4+?
- 1...Sxd4
- 2.Qxd4#
- 1...Ke4!
- 1...Sxd4
- 1.Kf7?
- Keys
- 1.Sb4!
- 1...Rxg4
- 2.Bxf6#
- 1...Bxd3
- 2.Sxd3#
- 1...Bxg4
- 2.Qe4#
- 1...Rh5
- 2.Bxf6#
- 1...Be4
- 2.Qxe4#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd4
- 2.Qc7#
- 1...Sd6
- 2.Qc3#
- 1...Sc7
- 2.Qc3#
- 1...Sc6
- 2.Sxc6#
- 1...Sc8
- 2.Sc6#
- 1...f3
- 2.Bg3#
- 1...Rxg4
- 1.Sb4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(e);OGATE,XB(D)::B(E),XP(h)
- R(e);OGATE::B(E),XP(h)
- B(d);N_GUARD,XP(B)::QAR1(C),XP(g)
- B(d);N_GUARD,XB(D)::QAR1(C)
- S(b);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C),XS(b)
- S(j);N_GUARD::QAR(C),XS(b)
- P(a);OGATEB::B(E)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- R(e);OGATE,XB(D)::B(E),XP(h)
- B(d);N_GUARD,XP(B)::QAR1(C),XP(g)
- B(d);N_GUARD,XB(D)::QAR1(C)
- R(e);OGATE::B(E),XP(h)
- S(b);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C),XS(b)
- S(j);N_GUARD::QAR(C),XS(b)
- P(a);OGATEB::B(E)
- Refutation
- S(b);CHECK
- Try
- S(A);
- Threat
- S(A)
- Vars
- B(d);N_GUARD,XB(D)::QAR1(C)
- B(d);N_GUARD::QAR1(C),XB(d)
- Refutation
- S(b);
- Try
- B(D);
- Vars
- B(d);N_GUARD::QAR1(C)
- B(d);N_GUARD::QAR1(C),XB(d)
- R(e);OGATE::B(E),XP(h)
- S(j);N_GUARD::QAR(C),XS(b)
- Refutation
- B(d);XP(B)
- Try
- B(D);
- Vars
- B(d);N_GUARD,XP(B)::QAR1(C),XP(g)
- B(d);N_GUARD,XB(D)::QAR1(C)
- B(d);N_GUARD::QAR1(C)
- R(e);OGATE::B(E),XP(h)
- S(b);N_GUARD::QAB1(C)
- S(b);N_GUARD::QAB1(C),XS(b)
- S(j);N_GUARD::QAR(C),XS(b)
- Refutation
- P(a);
- Try
- B(E);XR(e)
- Threat
- DUALS(2)
- Vars
- B(d);N_GUARD,XB(D)::QAR1(C)
- Refutation
- P(h);XB(E)
- Try
- Q(C);CHECK
- Vars
- K(c);P-FLIGHT::S(A)
- S(b);N_GUARD,P_SPINS(b)::QAB1(C),XS(b)
- Refutation
- S(b);XQ(C)
- Try
- Q(C);CHECK,XP(a)
- Vars
- K(c);P-FLIGHT::S(A)
- Refutation
- K(c);S_FLIGHT,XQ(C)
- Try
- Q(C);
- Vars
- R(e);OGATE,XB(D)::B(E),XP(h)
- B(d);N_GUARD,XP(B)::QAR1(C),XP(g)
- B(d);N_GUARD,XB(D)::QAR1(C)
- P(a);OGATEB::B(E)
- R(e);OGATE::B(E),XP(h)
- S(b);N_GUARD::QAB1(C)
- S(j);N_GUARD::QAR(C),XS(b)
- Refutation
- S(j);XQ(C)
- Try
- P(B);CHECK
- Vars
- S(b);OGATE,XP(B)::QAB1(C),XS(b)
- Refutation
- K(c);P-FLIGHT
- Try
- Actual
- S(A);
- Vars
- R(e);OGATE,XB(D)::B(E),XP(h)
- B(d);XP(B)::S(A),XB(d)
- B(d);N_GUARD,XB(D)::QAR1(C)
- R(e);OGATE::B(E),XP(h)
- B(d);N_GUARD::QAR1(C),XB(d)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(b);N_GUARD,SBLOCK::QAB(C)
- S(j);N_GUARD::S(A),XS(j)
- S(j);N_GUARD::S(A)
- P(a);OGATEB::B(E)
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