MESON Chess Problem Database
Problem Display
PID: 185273 (8/1rpB4/1b1k2N1/nQ6/n2N4/3R4/5K2/8 w - - 0 1)
Sumner, Christopher Richard Benson
The Observer, 1931
(First published on Sun Jan 11 1931)
#2
6 + 6
| 15239 | Valois Notebooks | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Bxd4+
- 2.Rxd4#
- 1...Sc5
- 2.Sf5#
- 1...Sb3
- 2.Qc6#
- 1...Sc4
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...c5
- 2.Se6#
- 1...Bxd4+
- Tries
- 1.Ke1?
- threat
- 2.Sf5#
- 1...Bxd4
- 2.Rxd4#
- 1...c5
- 2.Se6#
- 1...c6!
- threat
- 1.Kf1?
- threat
- 2.Sf5#
- 1...Bxd4
- 2.Rxd4#
- 1...c5
- 2.Se6#
- 1...c6!
- threat
- 1.Kg2?
- threat
- 2.Sf5#
- 1...Bxd4
- 2.Rxd4#
- 1...c5
- 2.Se6#
- 1...c6!
- threat
- 1.Kf3?
- threat
- 2.Sf5#
- 1...Bxd4
- 2.Rxd4#
- 1...c5
- 2.Se6#
- 1...c6!
- threat
- 1.Kg3?
- threat
- 2.Sf5#
- 1...Bxd4
- 2.Rxd4#
- 1...c5
- 2.Se6#
- 1...c6!
- threat
- 1.Bh3?
- threat
- 2.Qe5#
- 1...Bxd4+
- 2.Rxd4#
- 1...Bc5
- 2.Qd7#
- 1...c5
- 2.Se6#
- 1...Sc4
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sc5!
- threat
- 1.Bg4?
- threat
- 2.Qe5#
- 1...Bxd4+
- 2.Rxd4#
- 1...Bc5
- 2.Qd7#
- 1...c5
- 2.Se6#
- 1...Sc4
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sc5!
- threat
- 1.Bf5?
- threat
- 2.Qe5#
- 1...Bxd4+
- 2.Rxd4#
- 1...Bc5
- 2.Qd7#
- 1...c5
- 2.Se6#
- 1...Sc4
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sc5!
- threat
- 1.Ke1?
- Keys
- 1.Bc8!
- threat
- 2.Qe5#
- 1...Bxd4+
- 2.Rxd4#
- 1...Bc5
- 2.Qd7#
- 1...Sc5
- 2.Sf5#
- 1...c5
- 2.Se6#
- 1...Sc4
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- threat
- 1.Bc8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- B(c);CHECK,OGATE,P_SPINB(c),XS(C)::R(B),XB(c)
- S(a);N_PINS(C)::R(B)+S(C),DCHECK
- S(b);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- P(f);N_PINS(C)::R(B)+S(C)
- Tries
- Try
- K(A);N_SPINS(C),S_FLIGHT
- Threat
- R(B)+S(C),DCHECK
- Vars
- B(c);OGATE,P_SPINB(c),XS(C)::R(B),XB(c)
- P(f);S_CUTB(c)::R(B)+S(C)
- Refutation
- P(f);
- Try
- K(A);N_SPINS(C),P-FLIGHT
- Threat
- R(B)+S(C),DCHECK
- Vars
- B(c);OGATE,P_SPINB(c),XS(C)::R(B),XB(c)
- P(f);S_CUTB(c)::R(B)+S(C)
- Refutation
- P(f);
- Try
- K(A);N_SPINS(C),P-FLIGHT
- Threat
- R(B)+S(C),DCHECK
- Vars
- B(c);OGATE,P_SPINB(c),XS(C)::R(B),XB(c)
- P(f);S_CUTB(c)::R(B)+S(C)
- Refutation
- P(f);
- Try
- K(A);N_SPINS(C),P-FLIGHT
- Threat
- R(B)+S(C),DCHECK
- Vars
- B(c);OGATE,P_SPINB(c),XS(C)::R(B),XB(c)
- P(f);S_CUTB(c)::R(B)+S(C)
- Refutation
- P(f);
- Try
- K(A);N_SPINS(C),S_FLIGHT
- Threat
- R(B)+S(C),DCHECK
- Vars
- B(c);OGATE,P_SPINB(c),XS(C)::R(B),XB(c)
- P(f);S_CUTB(c)::R(B)+S(C)
- Refutation
- P(f);
- Try
- B(F);
- Threat
- QAB1(D)
- Vars
- B(c);CHECK,OGATE,P_SPINB(c),XS(C)::R(B),XB(c)
- B(c);SBLOCK::QAR1(D)
- P(f);N_PINS(C)::R(B)+S(C)
- S(b);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- Refutation
- S(a);N_PINS(C)
- Try
- B(F);
- Threat
- QAB1(D)
- Vars
- B(c);CHECK,OGATE,P_SPINB(c),XS(C)::R(B),XB(c)
- B(c);SBLOCK::QAR1(D)
- P(f);N_PINS(C)::R(B)+S(C)
- S(b);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- Refutation
- S(a);N_PINS(C)
- Try
- B(F);
- Threat
- QAB1(D)
- Vars
- B(c);CHECK,OGATE,P_SPINB(c),XS(C)::R(B),XB(c)
- B(c);SBLOCK::QAR1(D)
- P(f);N_PINS(C)::R(B)+S(C)
- S(b);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- Refutation
- S(a);N_PINS(C)
- Try
- Actual
- B(F);
- Threat
- QAB1(D)
- Vars
- B(c);CHECK,OGATE,P_SPINB(c),XS(C)::R(B),XB(c)
- B(c);SBLOCK::QAR1(D)
- S(a);N_PINS(C)::R(B)+S(C),DCHECK
- P(f);N_PINS(C)::R(B)+S(C)
- S(b);N_GUARD::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
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