MESON Chess Problem Database
Problem Display
PID: 51366 (3B4/7b/r2pp2b/4kppR/1Q6/8/P2R2NK/qB6 w - - 0 1)
Sumner, Christopher Richard Benson
Manchester Guardian, 1958
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.Qxb2#
- 1...Qc3
- 2.Qxc3#
- 1...Qd4
- 2.Qxd4#
- 1...Qxb1
- 2.Qd4#
- 1...Qxa2
- 2.Qc3#
- 2.Qd4#
- 1...Rxa2
- 2.Qxd6#
- 1...Ra3
- 2.Qxd6#
- 1...Ra4
- 2.Qxd6#
- 1...Ra5
- 2.Qxd6#
- 1...Ra7
- 2.Qxd6#
- 1...Ra8
- 2.Qxd6#
- 1...f4
- 2.Qxf4#
- 1...g4
- 2.Qe4#
- 1...d5
- 2.Re2#
- 1...Qb2
- Tries
- 1.Se1?
- threat
- 2.Sf3#
- 1...Qd4
- 2.Qxd4#
- 1...Ra3
- 2.Qxd6#
- 1...g4
- 2.Qe4#
- 1...Qc3!
- threat
- 1.Sh4?
- threat
- 2.Sf3#
- 1...gxh4
- 2.Qe4#
- 1...Qd4
- 2.Qxd4#
- 1...Ra3
- 2.Qxd6#
- 1...g4
- 2.Qe4#
- 1...Qc3!
- threat
- 1.Bxg5?
- threat
- 2.Qf4#
- 1...Qd4
- 2.Qxd4#
- 1...Ra4
- 2.Qxd6#
- 1...f4
- 2.Qxf4#
- 1...Bxg5!
- threat
- 1.Rxg5?
- threat
- 2.Qe4#
- 2.Qf4#
- 1...Qxb1
- 2.Qd4#
- 2.Qf4#
- 1...Qd4
- 2.Qxd4#
- 1...Ra4
- 2.Qxd6#
- 1...d5
- 2.Re2#
- 2.Qf4#
- 1...Bxg5!
- threat
- 1.Rxh6?
- threat
- 2.Bf6#
- 1...Qd4
- 2.Qxd4#
- 1...Bg6!
- threat
- 1.Qc5+?
- 1...d5
- 2.Re2#
- 1...dxc5!
- 1...d5
- 1.Se1?
- Keys
- 1.Rd1!
- threat
- 2.Qe1#
- 1...Qxb1
- 2.Qd4#
- 1...Qxa2
- 2.Qc3#
- 2.Qd4#
- 1...Rxa2
- 2.Qxd6#
- 1...Qd4
- 2.Qxd4#
- 1...Qb2
- 2.Qxb2#
- 1...Qc3
- 2.Qxc3#
- 1...Ra3
- 2.Qxd6#
- 1...Ra4
- 2.Qxd6#
- 1...f4
- 2.Qxf4#
- 1...g4
- 2.Qe4#
- 1...d5
- 2.Re1#
- threat
- 1.Rd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- Q(a);N_GUARD::QAB(F),XQ(a)
- Q(a);N_GUARD::QAB1(F),XQ(a)
- Q(a);N_GUARD,XB(A)::QAB1(F)
- R(e);N_GUARD,XP(B)::QAB1(F),XP(f)
- R(e);N_GUARD::QAB1(F),XP(f)
- P(c);P_SPINP(d)::QAB1(F),XP(c)
- P(d);P_SPINP(c)::QAR1(F)
- P(f);SBLOCK::R(C)
- Tries
- Try
- S(D);
- Threat
- S(D)
- Vars
- Q(a);N_GUARD::QAB1(F),XQ(a)
- R(e);N_GUARD::QAB1(F),XP(f)
- P(d);P_SPINP(c)::QAR1(F)
- Refutation
- Q(a);
- Try
- S(D);
- Threat
- S(D)
- Vars
- P(d);P_SPINP(c),XS(D)::QAR1(F)
- Q(a);N_GUARD::QAB1(F),XQ(a)
- R(e);N_GUARD::QAB1(F),XP(f)
- P(d);P_SPINP(c)::QAR1(F)
- Refutation
- Q(a);
- Try
- B(H);XP(d)
- Threat
- QAB1(F)
- Vars
- Q(a);N_GUARD::QAB1(F),XQ(a)
- R(e);N_GUARD::QAB1(F),XP(f)
- P(c);::QAB1(F),XP(c)
- Refutation
- B(h);XB(H)
- Try
- R(G);P_PINP(c),XP(d)
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD::QAB1(F),XQ(a)
- R(e);N_GUARD::QAB1(F),XP(f)
- Refutation
- B(h);N_SPINP(c),XR(G)
- Try
- R(G);XB(h)
- Threat
- B(H)
- Vars
- Q(a);N_GUARD::QAB1(F),XQ(a)
- Refutation
- B(i);
- Try
- Q(F);CHECK
- Vars
- P(f);P_SPINP(f)::R(C)
- Refutation
- P(f);XQ(F)
- Try
- Actual
- R(C);
- Threat
- QAR(F)
- Vars
- Q(a);N_GUARD,XB(A)::QAB1(F)
- R(e);N_GUARD,P_PINS(D),XP(B)::QAB1(F),XP(f)
- Q(a);N_GUARD::QAB1(F),XQ(a)
- Q(a);N_GUARD,P_PINS(D)::QAB(F),XQ(a)
- Q(a);N_GUARD::QAB(F),XQ(a)
- R(e);N_GUARD::QAB1(F),XP(f)
- P(c);P_SPINP(d)::QAB1(F),XP(c)
- P(d);P_SPINP(c)::QAR1(F)
- P(f);SBLOCK::R(C)
Developed and maintained by Brian Stephenson.
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