MESON Chess Problem Database
Problem Display
PID: 195837 (b1R1RB2/3k4/2N5/3N3p/8/8/1q1P4/3B3K w - - 0 1)
Andrade, Barry Jack da Costa
The Observer, 1942
(First published on Sun Apr 26 1942)
#2
8 + 4
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.Sb6#
- 2.Sb8#
- 1...Qc1
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qa3
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qc3
- 2.Sb6#
- 2.Sb8#
- 1...Qd4
- 2.Sb8#
- 1...Qe5
- 2.Sb6#
- 2.Sxe5#
- 1...Qf6
- 2.Sb6#
- 2.Sxf6#
- 2.Sb8#
- 1...Qg7
- 2.Sb6#
- 2.Sb8#
- 1...Qh8
- 2.Sb6#
- 2.Sb8#
- 1...Qb1
- 2.Sf6#
- 2.Se5#
- 1...Qa2
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qc2
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qxd2
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qb3
- 2.Sf6#
- 2.Se5#
- 1...Qb4
- 2.Sf6#
- 2.Se5#
- 1...Qb5
- 2.Sf6#
- 2.Se5#
- 1...Qb6
- 2.Sxb6#
- 2.Sf6#
- 2.Se5#
- 1...Qb7
- 2.Sf6#
- 2.Se5#
- 1...Qb8
- 2.Sf6#
- 2.Sxb8#
- 1...Bxc6
- 2.Rcd8#
- 1...Bb7
- 2.Sb8#
- 1...h4
- 2.Bg4#
- 1...Qa1
- Tries
- 1.Kh2?
- 1...Qe5+
- 2.Sxe5#
- 1...Qb8+
- 2.Sxb8#
- 1...Bxc6
- 2.Rcd8#
- 1...Qa1
- 2.Sb6#
- 2.Sb8#
- 1...Qc1
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qa3
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qc3
- 2.Sb6#
- 2.Sb8#
- 1...Qd4
- 2.Sb8#
- 1...Qf6
- 2.Sb6#
- 2.Sxf6#
- 2.Sb8#
- 1...Qg7
- 2.Sb6#
- 2.Sb8#
- 1...Qh8
- 2.Sb6#
- 2.Sb8#
- 1...Qb1
- 2.Sf6#
- 2.Se5#
- 1...Qa2
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qc2
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qb3
- 2.Sf6#
- 2.Se5#
- 1...Qb4
- 2.Sf6#
- 2.Se5#
- 1...Qb5
- 2.Sf6#
- 2.Se5#
- 1...Qb6
- 2.Sxb6#
- 2.Sf6#
- 2.Se5#
- 1...Qb7
- 2.Sf6#
- 2.Se5#
- 1...Bb7
- 2.Sb8#
- 1...h4
- 2.Bg4#
- 1...Qxd2+!
- 1...Qe5+
- 1.Bb4?
- threat
- 2.Sb6#
- 2.Sb8#
- 1...Bxc6
- 2.Rcd8#
- 1...Qd4
- 2.Sb8#
- 1...Qe5
- 2.Sb6#
- 2.Sxe5#
- 1...Qxb4!
- threat
- 1.Re7+?
- 1...Kxc8
- 2.Rc7#
- 1...Kd6!
- 1...Kxc8
- 1.Kh2?
- Keys
- 1.Bc5!
- 1...Qxd2
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Bxc6
- 2.Rcd8#
- 1...Qf6
- 2.Sb6#
- 2.Sxf6#
- 2.Sb8#
- 1...Qa1
- 2.Sb6#
- 2.Sb8#
- 1...Qc1
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qa3
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qc3
- 2.Sb6#
- 2.Sb8#
- 1...Qd4
- 2.Sb6#
- 2.Sb8#
- 1...Qe5
- 2.Sb6#
- 2.Sxe5#
- 1...Qg7
- 2.Sb6#
- 2.Sb8#
- 1...Qh8
- 2.Sb6#
- 2.Sb8#
- 1...Qb1
- 2.Sf6#
- 2.Se5#
- 1...Qa2
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qc2
- 2.Sb6#
- 2.Sf6#
- 2.Se5#
- 2.Sb8#
- 1...Qb3
- 2.Sf6#
- 2.Se5#
- 1...Qb4
- 2.Sf6#
- 2.Se5#
- 1...Qb5
- 2.Sf6#
- 2.Se5#
- 1...Qb6
- 2.Sxb6#
- 2.Sf6#
- 2.Se5#
- 1...Qb7
- 2.Sf6#
- 2.Se5#
- 1...Qb8
- 2.Sf6#
- 2.Sxb8#
- 1...Bb7
- 2.Sb8#
- 1...h4
- 2.Bg4#
- 1...Qxd2
- 1.Bc5!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- Q(a);N_GUARD::S(E)
- B(d);P_PINS(D),SBLOCK,XS(E)::R1(F)
- B(d);S_CUTQ(a)::S(E)
- P(b);N_GUARD::B(A)
- Tries
- Try
- K(B);P-FLIGHT,P_SPINP(C)
- Vars
- Q(a);CHECK,N_GUARD,N_PINP(C)::S(E),XQ(a)
- B(d);SBLOCK,XS(E)::R1(F)
- Q(a);N_GUARD,N_PINP(C)::S(E)
- B(d);S_CUTQ(a)::S(E)
- P(b);N_GUARD::B(A)
- Refutation
- Q(a);CHECK,XP(C)
- Try
- B(H);
- Threat
- DUALS(2)
- Vars
- B(d);P_PINS(D),SBLOCK,XS(E)::R1(F)
- Q(a);::S(E)
- Refutation
- Q(a);XB(H)
- Try
- R(G);CHECK
- Vars
- K(c);OGATE,S_FLIGHT,XR(F)::R1(G)
- Refutation
- K(c);P-FLIGHT
- Try
- Actual
- B(H);
- Vars
- B(d);P_PINS(D),SBLOCK,XS(E)::R1(F)
- B(d);S_CUTQ(a)::S(E)
- P(b);N_GUARD::B(A)
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