MESON Chess Problem Database
Problem Display
PID: 199464 (2n5/3R2Qb/K3kr2/2P5/1p2Bp2/5N2/2n1R3/8 w - - 0 1)
Unwin, George
The Observer, 1945
(First published on Sun May 27 1945)
#2
7 + 7
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rf5
- 2.Bd5#
- 1...Rg6
- 2.Bxc2#
- 2.Qf7#
- 1...Rh6
- 2.Sg5#
- 2.Qf7#
- 1...Rf7
- 2.Qxf7#
- 1...Rf8
- 2.Sg5#
- 1...Bf5
- 2.Bd5#
- 1...Bg8
- 2.Bxc2#
- 1...Sa1
- 2.Bg6#
- 2.Bxh7#
- 1...Se1
- 2.Bg6#
- 2.Bxh7#
- 1...Sa3
- 2.Bg6#
- 2.Bxh7#
- 1...Sb6
- 2.Rd6#
- 2.Re7#
- 2.Qe7#
- 1...Sd6
- 2.Rxd6#
- 2.Re7#
- 2.Qe7#
- 1...Sa7
- 2.Rd6#
- 2.Re7#
- 2.Qe7#
- 1...Se7
- 2.Rd6#
- 2.Rxe7#
- 2.Qxe7#
- 1...Rf5
- Tries
- 1.Rd1?
- threat
- 2.Qd7#
- 1...Rf7
- 2.Qe5#
- 1...Rf5
- 2.Bd5#
- 1...Rg6
- 2.Bxc2#
- 1...Rh6
- 2.Sg5#
- 1...Rf8
- 2.Sg5#
- 1...Sb6
- 2.Rd6#
- 1...Sd6
- 2.Rxd6#
- 1...Se7
- 2.Rd6#
- 1...Sd4!
- threat
- 1.Rdd2?
- threat
- 2.Qd7#
- 1...Rf7
- 2.Qe5#
- 1...Rf5
- 2.Bd5#
- 1...Rg6
- 2.Bxc2#
- 1...Rh6
- 2.Sg5#
- 1...Rf8
- 2.Sg5#
- 1...Sb6
- 2.Rd6#
- 1...Sd6
- 2.Rxd6#
- 1...Se7
- 2.Rd6#
- 1...Sd4!
- threat
- 1.Rd4?
- threat
- 2.Qd7#
- 1...Rf7
- 2.Qe5#
- 1...Rf5
- 2.Bd5#
- 1...Rg6
- 2.Bxc2#
- 1...Rh6
- 2.Sg5#
- 1...Rf8
- 2.Sg5#
- 1...Sb6
- 2.Rd6#
- 1...Sd6
- 2.Rxd6#
- 1...Se7
- 2.Rd6#
- 1...Sxd4!
- threat
- 1.Rd5?
- threat
- 2.Sg5#
- 2.Re5#
- 2.Qd7#
- 1...Bxe4
- 2.Re5#
- 2.Qd7#
- 1...Rf7
- 2.Qe5#
- 1...Rg6
- 2.Re5#
- 1...Rh6
- 2.Sg5#
- 2.Re5#
- 1...Rf8
- 2.Sg5#
- 2.Re5#
- 1...Sb6
- 2.Sg5#
- 2.Re5#
- 2.Rd6#
- 1...Sd6
- 2.Sg5#
- 2.Re5#
- 2.Rxd6#
- 1...Se7
- 2.Sg5#
- 2.Rd6#
- 1...Rf5!
- threat
- 1.Rb7?
- threat
- 2.Qd7#
- 1...Rg6
- 2.Qe5#
- 2.Qf7#
- 1...Rh6
- 2.Sg5#
- 2.Qe5#
- 2.Qf7#
- 1...Rf7
- 2.Sg5#
- 2.Qe5#
- 2.Qxf7#
- 1...Rf8
- 2.Sg5#
- 2.Qe5#
- 1...Sb6
- 2.Rxb6#
- 2.Re7#
- 2.Qe7#
- 1...Se7
- 2.Rxe7#
- 2.Qxe7#
- 1...Rf5!
- threat
- 1.Rc7?
- threat
- 2.Qd7#
- 1...Rg6
- 2.Qe5#
- 2.Qf7#
- 1...Rh6
- 2.Sg5#
- 2.Qe5#
- 2.Qf7#
- 1...Rf7
- 2.Sg5#
- 2.Qe5#
- 2.Qxf7#
- 1...Rf8
- 2.Sg5#
- 2.Qe5#
- 1...Sb6
- 2.Rc6#
- 2.Re7#
- 2.Qe7#
- 1...Se7
- 2.Rxe7#
- 2.Qxe7#
- 1...Rf5!
- threat
- 1.Qg4+?
- 1...Bf5
- 2.Bxf5#
- 1...Rf5!
- 1...Bf5
- 1.Qxh7?
- threat
- 2.Bxc2#
- 2.Bd5#
- 2.Bf5#
- 1...Rf5
- 2.Qxf5#
- 1...Rg6
- 2.Qf7#
- 1...Rh6
- 2.Qf5#
- 2.Qf7#
- 1...Rf7
- 2.Qxf7#
- 1...Se7
- 2.Bf5#
- 2.Rd6#
- 2.Rxe7#
- 2.Qxe7#
- 1...Se3
- 2.Bd5#
- 1...Sa1
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Ba8#
- 1...Se1
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Ba8#
- 1...Sa3
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Ba8#
- 1...Sd4
- 2.Bd5#
- 2.Bf5#
- 1...Sd6
- 2.Rxd6#
- 2.Re7#
- 2.Qe7#
- 1...Rf8!
- threat
- 1.Rd1?
- Keys
- 1.Rd8!
- threat
- 2.Qd7#
- 1...Rf7
- 2.Qe5#
- 1...Rf5
- 2.Bd5#
- 1...Rg6
- 2.Bxc2#
- 1...Rh6
- 2.Sg5#
- 1...Rf8
- 2.Sg5#
- 1...Sb6
- 2.Rd6#
- 2.Re8#
- 1...Se7
- 2.Rd6#
- threat
- 1.Rd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- R(e);SBLOCK::R(A)+B(C),DCHECK
- R(e);N_GUARD::QAB1(G),XR(e)
- R(e);::S(B)
- B(f);SBLOCK::R(A)+B(C),DCHECK
- B(f);N_GUARD::R(A)+B(C),XS(a)
- Tries
- Try
- R(F);
- Threat
- QAB1(G)
- Vars
- R(e);OGATE,SBLOCK::QAR1(G)
- R(e);SBLOCK::R(A)+B(C),DCHECK
- R(e);S_CUTB(f)::R(A)+B(C),XS(a)
- R(e);::S(B)
- S(g);N_GUARD::R1(F)
- S(g);N_GUARD::R1(F),XS(g)
- Refutation
- S(a);
- Try
- R(F);
- Threat
- QAB1(G)
- Vars
- R(e);OGATE,SBLOCK::QAR1(G)
- R(e);SBLOCK::R(A)+B(C),DCHECK
- R(e);S_CUTB(f)::R(A)+B(C),XS(a)
- R(e);::S(B)
- S(g);N_GUARD::R1(F)
- S(g);N_GUARD::R1(F),XS(g)
- Refutation
- S(a);
- Try
- R(F);
- Threat
- QAB1(G)
- Vars
- R(e);OGATE,SBLOCK::QAR1(G)
- R(e);SBLOCK::R(A)+B(C),DCHECK
- R(e);S_CUTB(f)::R(A)+B(C),XS(a)
- R(e);::S(B)
- S(g);N_GUARD::R1(F)
- S(g);N_GUARD::R1(F),XS(g)
- Refutation
- S(a);XR(F)
- Try
- R(F);
- Threat
- DUALS(3)
- Vars
- R(e);OGATE,SBLOCK::QAR1(G)
- R(e);::R1(F)
- Refutation
- R(e);
- Try
- R(F);
- Threat
- QAB1(G)
- Refutation
- R(e);
- Try
- R(F);
- Threat
- QAB1(G)
- Refutation
- R(e);
- Try
- Q(G);CHECK
- Vars
- B(f);P_SPINB(f)::R(A)+B(C),DCHECK,XB(f)
- Refutation
- R(e);P_SPINR(e)
- Try
- Q(G);XB(f)
- Threat
- DUALS(3)
- Vars
- R(e);N_GUARD::QAB1(G),XR(e)
- R(e);N_GUARD::QAB1(G)
- S(a);::B(C)
- Refutation
- R(e);
- Try
- Actual
- R(F);
- Threat
- QAB1(G)
- Vars
- R(e);OGATE,SBLOCK::QAR1(G)
- R(e);SBLOCK::R(A)+B(C),DCHECK
- R(e);S_CUTB(f)::R(A)+B(C),XS(a)
- R(e);::S(B)
- S(g);N_GUARD::R1(F)
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