MESON Chess Problem Database
Problem Display
PID: 195257 (8/2Bpp1KQ/r1p5/p1PN1R2/2ppk1p1/1p3R2/3n1P1n/1rb2b1q w - - 0 1)
Andrade, Barry Jack da Costa
The Observer, 1941
(First published on Sun Sep 21 1941)
#2
8 + 16
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qxf3
- 2.Re5#
- 1...Bd3
- 2.R3f4#
- 1...Sdxf3
- 2.Re5#
- 2.Rg5#
- 2.Rh5#
- 1...Shxf3
- 2.Re5#
- 2.Rh5#
- 1...d3
- 2.R3f4#
- 1...gxf3
- 2.Re5#
- 2.Rg5#
- 2.Rh5#
- 1...cxd5
- 2.R5f4#
- 2.Rf6#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Sf6#
- 1...Qxf3
- Tries
- 1.Kg8?
- threat
- 2.Qxe7#
- 1...Qxf3
- 2.Re5#
- 1...Sdxf3
- 2.Re5#
- 2.Rg5#
- 2.Rh5#
- 1...Shxf3
- 2.Re5#
- 2.Rh5#
- 1...gxf3
- 2.Re5#
- 2.Rg5#
- 2.Rh5#
- 1...cxd5
- 2.R5f4#
- 2.Rf6#
- 1...d3
- 2.R3f4#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Sf6#
- 1...Ra8+!
- threat
- 1.Kh8?
- threat
- 2.Qxe7#
- 1...Qxf3
- 2.Re5#
- 1...Sdxf3
- 2.Re5#
- 2.Rg5#
- 2.Rh5#
- 1...Shxf3
- 2.Re5#
- 2.Rh5#
- 1...gxf3
- 2.Re5#
- 2.Rg5#
- 2.Rh5#
- 1...cxd5
- 2.R5f4#
- 2.Rf6#
- 1...d3
- 2.R3f4#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Sf6#
- 1...Ra8+!
- threat
- 1.Sb4?
- threat
- 2.R3f4#
- 2.R5f4#
- 2.Rf6#
- 2.Rf7#
- 2.Rf8#
- 1...Qxf3
- 2.Rf4#
- 1...Sdxf3
- 2.Rf4#
- 2.Rd5#
- 2.Rg5#
- 2.Rh5#
- 2.Rf6#
- 2.Rf7#
- 2.Rf8#
- 1...Shxf3
- 2.Rf4#
- 2.Rh5#
- 1...gxf3
- 2.Rf4#
- 2.Rd5#
- 2.Rg5#
- 2.Rh5#
- 2.Rf6#
- 2.Rf7#
- 2.Rf8#
- 1...d3
- 2.R3f4#
- 2.R5f4#
- 1...d6
- 2.R3f4#
- 1...e5
- 2.R5f4#
- 2.Rf6#
- 2.Rf7#
- 2.Rf8#
- 1...axb4!
- threat
- 1.Sxe7?
- threat
- 2.R5f4#
- 2.Rf6#
- 2.Rf7#
- 2.Rf8#
- 1...Qxf3
- 2.Rf4#
- 1...Shxf3
- 2.Rf4#
- 2.Rh5#
- 1...d3
- 2.R3f4#
- 2.R5f4#
- 1...d6!
- threat
- 1.Rg3?
- threat
- 2.Re5#
- 2.Rg5#
- 2.Rh5#
- 1...cxd5
- 2.Rf4#
- 2.Rf6#
- 1...Qf3
- 2.Re5#
- 1...Shf3
- 2.Re5#
- 2.Rh5#
- 1...e5
- 2.Sf6#
- 2.Rxe5#
- 1...d6
- 2.Rg5#
- 2.Rh5#
- 1...d3!
- threat
- 1.Kg8?
- Keys
- 1.Kh6!
- threat
- 2.Qxe7#
- 1...Sdxf3+
- 2.Rg5#
- 1...Shxf3+
- 2.Rh5#
- 1...cxd5+
- 2.Rf6#
- 1...Qxf3
- 2.Re5#
- 1...gxf3
- 2.Re5#
- 2.Rg5#
- 2.Rh5#
- 1...d3
- 2.R3f4#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Sf6#
- threat
- 1.Kh6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- Q(d);SBLOCK,XR(B)::QAB(H)+R(E),DCHECK
- B(c);SBLOCK::R1(B)
- P(i);SBLOCK::R1(B)
- P(p);N_GUARD::S(D)
- Tries
- Try
- K(G);P-FLIGHT
- Threat
- QAR(H),XP(p)
- Vars
- Q(d);SBLOCK,XR(B)::QAB(H)+R(E),DCHECK
- P(i);SBLOCK::R1(B)
- P(p);N_GUARD::S(D)
- Refutation
- R(m);CHECK
- Try
- K(G);S_FLIGHT
- Threat
- QAR(H),XP(p)
- Vars
- Q(d);SBLOCK,XR(B)::QAB(H)+R(E),DCHECK
- P(i);SBLOCK::R1(B)
- P(p);N_GUARD::S(D)
- Refutation
- R(m);CHECK
- Try
- S(D);
- Threat
- DUALS(5)
- Vars
- Q(d);XR(B)::QAB(H)+R(E),DCHECK
- P(o);::R1(B)
- Refutation
- P(l);XS(D)
- Try
- S(D);XP(p)
- Threat
- DUALS(4)
- Vars
- Q(d);XR(B)::QAB(H)+R(E),DCHECK
- Refutation
- P(o);
- Try
- R(B);
- Threat
- DUALS(3)
- Vars
- Q(d);::QAB(H)+R(E),DCHECK
- Refutation
- P(i);
- Try
- Actual
- K(G);S_FLIGHT
- Threat
- QAR(H),XP(p)
- Vars
- S(e);CHECK,SBLOCK,XR(B)::QAB(H)+R(E)
- S(f);CHECK,SBLOCK,XR(B)::QAB(H)+R(E)
- P(n);CHECK,SBLOCK,XS(D)::QAB(H)+R(E)
- Q(d);SBLOCK,XR(B)::QAB(H)+R(E),DCHECK
- P(i);SBLOCK::R1(B)
- P(p);N_GUARD::S(D)
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