MESON Chess Problem Database
Problem Display
PID: 198981 (2n5/b2pp3/Rr1Nkp2/8/2P1NPP1/1B1p4/4RBb1/6K1 w - - 0 1)
Gray, Henry
The Observer, 1944
(First published on Sun Nov 5 1944)
#2
10 + 9
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rxb3
- 2.Sc5#
- 2.Sg5#
- 1...Rb4
- 2.Sc5#
- 2.Sg5#
- 1...Rb5
- 2.Sc5#
- 2.Sg5#
- 2.cxb5#
- 1...Rxa6
- 2.c5#
- 1...Rc6
- 2.c5#
- 1...Rxd6
- 2.Sg5#
- 2.c5#
- 1...Rb7
- 2.Sc5#
- 2.Sg5#
- 1...Rb8
- 2.Sc5#
- 2.Sg5#
- 1...Sxd6
- 2.Sg5#
- 1...f5
- 2.gxf5#
- 1...exd6
- 2.Sg5#
- 1...Rxb3
- Tries
- 1.Bd4?
- threat
- 2.f5#
- 1...Rxd6
- 2.Sg5#
- 2.c5#
- 1...Sxd6
- 2.Sg5#
- 1...exd6
- 2.Sg5#
- 1...Rb5
- 2.Sc5#
- 2.Sg5#
- 2.cxb5#
- 1...f5
- 2.gxf5#
- 1...Bxe4!
- threat
- 1.Bc5?
- threat
- 2.Sg5#
- 1...Bxe4
- 2.Rxe4#
- 1...f5
- 2.gxf5#
- 1...dxe2!
- threat
- 1.Bxb6?
- threat
- 2.c5#
- 1...Sxd6
- 2.Sg5#
- 1...exd6
- 2.Sg5#
- 1...Sxb6!
- threat
- 1.Ra5?
- threat
- 2.f5#
- 1...Rxd6
- 2.Sg5#
- 1...Sxd6
- 2.Sg5#
- 1...exd6
- 2.Sg5#
- 1...Rb5
- 2.cxb5#
- 1...f5
- 2.Re5#
- 2.gxf5#
- 1...Bxe4!
- threat
- 1.Rxb6?
- threat
- 2.Sc5#
- 2.Sg5#
- 2.c5#
- 1...Bxe4
- 2.Rxe4#
- 2.c5#
- 1...Bxb6
- 2.c5#
- 1...Sxd6
- 2.Sg5#
- 2.c5#
- 1...dxe2
- 2.Sc5#
- 2.c5#
- 1...exd6
- 2.Sg5#
- 1...f5
- 2.c5#
- 2.gxf5#
- 1...Sxb6!
- threat
- 1.Bd4?
- Keys
- 1.Bg3!
- threat
- 2.f5#
- 1...Rxb3+
- 2.Sc5#
- 1...Rb4+
- 2.Sc5#
- 1...Rb5+
- 2.Sc5#
- 1...Rxa6+
- 2.c5#
- 1...Rc6+
- 2.c5#
- 1...Rxd6+
- 2.c5#
- 1...Rb7+
- 2.Sc5#
- 1...Rb8+
- 2.Sc5#
- 1...Sxd6
- 2.Sg5#
- 1...exd6
- 2.Sg5#
- 1...f5
- 2.gxf5#
- threat
- 1.Bg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD,P_PINB(C),XR(I)::B(D)+P(E)
- R(c);N_GUARD,P_PINB(C)::B(D)+P(E)
- S(i);SBLOCK,XS(J)::R(B)+S(F),DCHECK
- P(e);OGATE::P(H),XP(e)
- P(h);SBLOCK,XS(J)::R(B)+S(F),DCHECK
- Tries
- Try
- B(C);
- Threat
- P(G)
- Vars
- S(i);SBLOCK,XS(J)::R(B)+S(F),DCHECK
- P(h);SBLOCK,XS(J)::R(B)+S(F),DCHECK
- P(e);OGATE::P(H),XP(e)
- Refutation
- B(a);P_SPINB(a),XS(F)
- Try
- B(C);
- Threat
- R(B)+S(F),DCHECK
- Vars
- B(a);OGATE,P_SPINB(a),XS(F)::R(B),XB(a)
- P(e);OGATE::P(H),XP(e)
- Refutation
- P(b);XR(B)
- Try
- B(C);P_SPINB(C),XR(c)
- Threat
- B(D)+P(E)
- Vars
- S(i);SBLOCK,XS(J)::R(B)+S(F),DCHECK
- P(h);SBLOCK,XS(J)::R(B)+S(F),DCHECK
- Refutation
- S(i);XB(C)
- Try
- R(I);
- Threat
- P(G)
- Vars
- R(c);P_PINB(C),SBLOCK,XS(J)::R(B)+S(F),DCHECK
- S(i);SBLOCK,XS(J)::R(B)+S(F),DCHECK
- P(h);SBLOCK,XS(J)::R(B)+S(F),DCHECK
- R(c);OGATE,P_PINB(C)::B(D)+P(E),XR(c)
- Refutation
- B(a);P_SPINB(a),XS(F)
- Try
- R(I);XR(c)
- Threat
- DUALS(3)
- Vars
- B(f);P_PINB(C),XR(I)::B(D)+P(E)
- P(h);P_SPINP(h),XS(J)::R(B)+S(F),DCHECK
- Refutation
- S(i);XR(I)
- Try
- Actual
- B(C);
- Threat
- P(G)
- Vars
- R(c);CHECK,XB(D)::R(B)+S(F),DCHECK
- R(c);CHECK::R(B)+S(F),DCHECK
- R(c);CHECK,N_GUARD,XR(I)::B(D)+P(E)
- R(c);CHECK,N_GUARD::B(D)+P(E)
- R(c);CHECK,N_GUARD,P_SPINR(c),XS(J)::B(D)+P(E)
- S(i);SBLOCK,XS(J)::R(B)+S(F),DCHECK
- P(h);SBLOCK,XS(J)::R(B)+S(F),DCHECK
- P(e);OGATE::P(H),XP(e)
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