MESON Chess Problem Database
Problem Display
PID: 210413 (2Q4B/N3nK2/p2p2P1/3pq3/1PpkP3/p3R3/B2P4/8 w - - 0 1)
Goulty, Allison Howard
The Observer, 1920
(First published on Sun Nov 21 1920)
#2
10 + 8
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...Qxh8
- 2.Qxh8#
- 1...Sf5
- 2.Sc6#
- 1...Sc6
- 2.Sxc6#
- 1...Sxg6
- 2.Sc6#
- 1...Sxc8
- 2.Sc6#
- 1...Sg8
- 2.Sc6#
- 1...c3
- 2.Qxc3#
- 1...dxe4
- 2.Qxc4#
- 1...a5
- 2.Sb5#
- 1...Qf6+
- Tries
- 1.Bb3?
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...Qxh8
- 2.Qxh8#
- 1...Sxg6
- 2.Sc6#
- 1...Sxc8
- 2.Sc6#
- 1...cxb3
- 2.Qc3#
- 1...dxe4
- 2.Qxc4#
- 1...Sf5
- 2.Sc6#
- 1...Sc6
- 2.Sxc6#
- 1...Sg8
- 2.Sc6#
- 1...c3
- 2.Qxc3#
- 1...a5
- 2.Sb5#
- 1...a2!
- 1...Qf6+
- 1.Bxe5+?
- 1...dxe5
- 2.Qc5#
- 1...Kxe5!
- 1...dxe5
- 1.Bf6?
- 1...Sxg6
- 2.Sc6#
- 1...Sxc8
- 2.Sc6#
- 1...dxe4
- 2.Qxc4#
- 1...Sf5
- 2.Sc6#
- 1...Sc6
- 2.Sxc6#
- 1...Sg8
- 2.Sc6#
- 1...c3
- 2.Qxc3#
- 1...a5
- 2.Sb5#
- 1...Qxf6+!
- 1...Sxg6
- 1.Bg7?
- 1...Qf6+
- 2.Bxf6#
- 1...Sxg6
- 2.Sc6#
- 1...Sxc8
- 2.Sc6#
- 1...dxe4
- 2.Qxc4#
- 1...Sf5
- 2.Sc6#
- 1...Sc6
- 2.Sxc6#
- 1...Sg8
- 2.Sc6#
- 1...c3
- 2.Qxc3#
- 1...a5
- 2.Sb5#
- 1...Qxg7+!
- 1...Qf6+
- 1.Qh3?
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...Qxh8
- 2.Qxh8#
- 1...Sxg6
- 2.Sc6#
- 1...Sf5
- 2.Sc6#
- 1...Sc6
- 2.Sxc6#
- 1...Sc8
- 2.Sc6#
- 1...Sg8
- 2.Sc6#
- 1...c3
- 2.dxc3#
- 1...a5
- 2.Sb5#
- 1...dxe4!
- 1...Qf6+
- 1.Qxa6?
- threat
- 2.Sb5#
- 2.Qb6#
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...dxe4
- 2.Qxc4#
- 1...Sc8
- 2.Sb5#
- 2.Sc6#
- 1...Qxh8!
- threat
- 1.Qb7?
- threat
- 2.Qb6#
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...dxe4
- 2.Qxe4#
- 1...Sc8
- 2.Sc6#
- 2.Qxd5#
- 1...Qxh8!
- threat
- 1.Qc6?
- threat
- 2.Qb6#
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...Sxc6
- 2.Sxc6#
- 1...dxe4
- 2.Qxe4#
- 2.Qxc4#
- 1...Sc8
- 2.Qxd5#
- 1...Qxh8!
- threat
- 1.Qc7?
- threat
- 2.Qb6#
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...dxe4
- 2.Qxc4#
- 1...Sc8
- 2.Sc6#
- 1...Qxh8!
- threat
- 1.Qa8?
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...Qxh8
- 2.Qxh8#
- 1...Sxg6
- 2.Sc6#
- 2.Qxd5#
- 1...dxe4
- 2.Qxe4#
- 1...Sf5
- 2.Sc6#
- 2.Qxd5#
- 1...Sc6
- 2.Sxc6#
- 1...Sc8
- 2.Sc6#
- 2.Qxd5#
- 1...Sg8
- 2.Sc6#
- 2.Qxd5#
- 1...a5
- 2.Sb5#
- 1...c3!
- 1...Qf6+
- 1.Qb8?
- threat
- 2.Qb6#
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...Qxh8
- 2.Qxh8#
- 1...Sc8
- 2.Sc6#
- 1...dxe4!
- threat
- 1.Qd8?
- threat
- 2.Qb6#
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...Qxh8
- 2.Qxh8#
- 1...Sc8
- 2.Sc6#
- 1...dxe4!
- threat
- 1.Bb3?
- Keys
- 1.Qg4!
- 1...Qf6+
- 2.Bxf6#
- 1...Qg7+
- 2.Bxg7#
- 1...Qxh8
- 2.e5#
- 1...Sxg6
- 2.Sc6#
- 1...dxe4
- 2.Qxe4#
- 1...Sf5
- 2.Sc6#
- 2.exf5#
- 1...Sc6
- 2.Sxc6#
- 1...Sc8
- 2.Sc6#
- 1...Sg8
- 2.Sc6#
- 1...c3
- 2.exd5#
- 1...a5
- 2.Sb5#
- 1...Qf6+
- 1.Qg4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- Q(e);N_SPINQ(e),OGATE,XB(J)::QAB(I),XQ(e)
- S(h);N_GUARD::S(G)
- S(h);N_GUARD::S(G),XS(h)
- S(h);N_GUARD,XP(F)::S(G)
- S(h);N_GUARD,XQ(I)::S(G)
- P(b);OGATE::QAB1(I),XP(b)
- P(d);N_GUARD,XP(E)::QAR1(I),XP(b)
- P(f);N_GUARD::S(G)
- Tries
- Try
- B(A);
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- Q(e);N_SPINQ(e),OGATE,XB(J)::QAB(I),XQ(e)
- S(h);N_GUARD,XP(F)::S(G)
- S(h);N_GUARD,XQ(I)::S(G)
- P(b);OGATE,XB(A)::QAB1(I)
- P(d);N_GUARD,XP(E)::QAR1(I),XP(b)
- S(h);N_GUARD::S(G)
- S(h);N_GUARD::S(G),XS(h)
- P(b);OGATE::QAB1(I),XP(b)
- P(f);N_GUARD::S(G)
- Refutation
- P(a);
- Try
- B(J);CHECK,XQ(e)
- Vars
- P(g);SBLOCK,XB(J)::QAB1(I)
- Refutation
- K(c);S_FLIGHT,XB(J)
- Try
- B(J);
- Vars
- S(h);N_GUARD,XP(F)::S(G)
- S(h);N_GUARD,XQ(I)::S(G)
- P(d);N_GUARD,XP(E)::QAR1(I),XP(b)
- S(h);N_GUARD::S(G)
- S(h);N_GUARD::S(G),XS(h)
- P(b);OGATE::QAB1(I),XP(b)
- P(f);N_GUARD::S(G)
- Refutation
- Q(e);CHECK,N_SPINQ(e),XB(J)
- Try
- B(J);
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- S(h);N_GUARD,XP(F)::S(G)
- S(h);N_GUARD,XQ(I)::S(G)
- P(d);N_GUARD,XP(E)::QAR1(I),XP(b)
- S(h);N_GUARD::S(G)
- S(h);N_GUARD::S(G),XS(h)
- P(b);OGATE::QAB1(I),XP(b)
- P(f);N_GUARD::S(G)
- Refutation
- Q(e);CHECK,N_SPINQ(e),XB(J)
- Try
- Q(I);
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- Q(e);N_SPINQ(e),OGATE,XB(J)::QAB(I),XQ(e)
- S(h);N_GUARD,XP(F)::S(G)
- S(h);N_GUARD::S(G)
- S(h);N_GUARD::S(G),XS(h)
- P(b);OGATE::P(B),XP(b)
- P(f);N_GUARD::S(G)
- Refutation
- P(d);XP(E)
- Try
- Q(I);XP(f)
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- P(d);N_GUARD,XP(E)::QAR1(I),XP(b)
- Refutation
- Q(e);N_SPINQ(e),XB(J)
- Try
- Q(I);
- Threat
- QAB(I)
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- P(d);OGATE,XP(E)::QAR1(I),XP(d)
- Refutation
- Q(e);N_SPINQ(e),XB(J)
- Try
- Q(I);
- Threat
- QAB(I)
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- S(h);XQ(I)::S(G),XS(h)
- S(h);N_GUARD::QAR1(I),XP(d)
- Refutation
- Q(e);N_SPINQ(e),XB(J)
- Try
- Q(I);
- Threat
- QAB(I)
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- P(d);N_GUARD,XP(E)::QAR1(I),XP(b)
- S(h);N_GUARD::S(G)
- Refutation
- Q(e);N_SPINQ(e),XB(J)
- Try
- Q(I);
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- Q(e);N_SPINQ(e),OGATE,XB(J)::QAB(I),XQ(e)
- P(d);OGATE,XP(E)::QAR1(I),XP(d)
- S(h);N_GUARD::S(G),XS(h)
- P(f);N_GUARD::S(G)
- Refutation
- P(b);
- Try
- Q(I);
- Threat
- QAB(I)
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- Q(e);N_SPINQ(e),OGATE,XB(J)::QAB(I),XQ(e)
- S(h);N_GUARD::S(G)
- Refutation
- P(d);XP(E)
- Try
- Q(I);
- Threat
- QAB(I)
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- Q(e);N_SPINQ(e),OGATE,XB(J)::QAB(I),XQ(e)
- S(h);N_GUARD::S(G)
- Refutation
- P(d);P_SPINP(g),XP(E)
- Try
- Actual
- Q(I);
- Vars
- Q(e);CHECK,OGATEB::B(J),XQ(e)
- Q(e);N_SPINQ(e),OGATE,XB(J)::QAR(I)+P(E)
- S(h);N_GUARD,XP(F)::S(G)
- P(d);OGATE,P_SPINP(d),XP(E)::QAR1(I),XP(d)
- S(h);N_GUARD::S(G),XS(h)
- S(h);N_GUARD::S(G)
- P(b);::QAR(I)+P(E),XP(d)
- P(f);N_GUARD::S(G)
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