MESON Chess Problem Database
Problem Display
PID: 434 (KBbr4/7Q/5R2/bBpk4/N4PP1/2p5/2N5/3r4 w - - 0 1)
Mansfield, Comins
The Observer, 1951
(First published on Sun Sep 23 1951)
#2
9 + 7
| 3550 | Complete Mansfield/II | 1997 |
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qd3#
- 1...Rb1
- 2.Qd3#
- 1...Rc1
- 2.Qd3#
- 1...Re1
- 2.Qd3#
- 1...Rf1
- 2.Qd3#
- 1...Rg1
- 2.Qd3#
- 1...Rh1
- 2.Qd3#
- 2.Qxh1#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Se3#
- 1...Rd6
- 2.Rxd6#
- 1...Rd7
- 2.Qf5#
- 1...Re8
- 2.Rd6#
- 1...Rf8
- 2.Rd6#
- 1...Rg8
- 2.Rd6#
- 1...Rh8
- 2.Rd6#
- 1...Bb4
- 2.Sb6#
- 1...Bb6
- 2.Sxc3#
- 2.Sxb6#
- 1...Bc7
- 2.Sxc3#
- 1...Bxg4
- 2.Qb7#
- 1...Bf5
- 2.Qxf5#
- 2.Qb7#
- 1...Ba6
- 2.Qf5#
- 1...Be6
- 2.Qb7#
- 1...Bb7+
- 2.Qxb7#
- 1...Bd7
- 2.Rd6#
- 1...c4
- 2.Bc6#
- 1...Ra1
- Tries
- 1.Bf1?
- threat
- 2.Qh1#
- 1...Bb7+
- 2.Qxb7#
- 1...Rxf1
- 2.Qd3#
- 1...Bxg4
- 2.Qb7#
- 1...Rd3
- 2.Qxd3#
- 1...Bf5
- 2.Qxf5#
- 2.Qb7#
- 1...Re1
- 2.Qd3#
- 1...Rd4
- 2.Se3#
- 1...Re8
- 2.Rd6#
- 1...Rh8
- 2.Rd6#
- 1...Rd2!
- threat
- 1.Bd3?
- threat
- 2.Qe4#
- 1...Bb7+
- 2.Qxb7#
- 1...Rxd3
- 2.Qxd3#
- 1...Re8
- 2.Rd6#
- 1...Bf5
- 2.Qxf5#
- 2.Qb7#
- 1...Re1!
- threat
- 1.Rf5+?
- 1...Ke6
- 2.Sxc5#
- 2.Qf7#
- 1...Bxf5
- 2.Qxf5#
- 1...Ke4!
- 1...Ke6
- 1.Rh6?
- 1...Bb7+
- 2.Qxb7#
- 1...Bxg4
- 2.Qb7#
- 1...Bf5
- 2.Qxf5#
- 2.Qb7#
- 1...Ra1
- 2.Qd3#
- 1...Rb1
- 2.Qd3#
- 1...Rc1
- 2.Qd3#
- 1...Re1
- 2.Qd3#
- 1...Rf1
- 2.Qd3#
- 1...Rg1
- 2.Qd3#
- 1...Rh1
- 2.Qd3#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Se3#
- 1...Rd6
- 2.Rxd6#
- 1...Rd7
- 2.Qf5#
- 1...Re8
- 2.Rd6#
- 1...Rf8
- 2.Rd6#
- 1...Rg8
- 2.Rd6#
- 1...Rh8
- 2.Rd6#
- 1...Bb4
- 2.Sb6#
- 1...Bb6
- 2.Sxc3#
- 2.Sxb6#
- 1...Bc7
- 2.Sxc3#
- 1...Ba6
- 2.Qf5#
- 1...Be6
- 2.Qb7#
- 1...Bd7
- 2.Rd6#
- 1...c4
- 2.Bc6#
- 1...Rd2!
- 1...Bb7+
- 1.Qh5+?
- 1...Bf5
- 2.Qxf5#
- 1...Ke4!
- 1...Bf5
- 1.Qe7?
- threat
- 2.Qe5#
- 1...Bb7+
- 2.Qxb7#
- 1...Be6
- 2.Qxe6#
- 2.Qb7#
- 1...Re8
- 2.Rd6#
- 1...Bc7
- 2.Sxc3#
- 1...Re1!
- threat
- 1.Qf7+?
- 1...Be6
- 2.Qxe6#
- 2.Qb7#
- 1...Ke4!
- 1...Be6
- 1.g5?
- 1...Bb7+
- 2.Qxb7#
- 1...Bf5
- 2.Qxf5#
- 2.Qb7#
- 1...Ra1
- 2.Qd3#
- 1...Rb1
- 2.Qd3#
- 1...Rc1
- 2.Qd3#
- 1...Re1
- 2.Qd3#
- 1...Rf1
- 2.Qd3#
- 1...Rg1
- 2.Qd3#
- 1...Rh1
- 2.Qd3#
- 2.Qxh1#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Se3#
- 1...Rd6
- 2.Rxd6#
- 1...Rd7
- 2.Qf5#
- 1...Re8
- 2.Rd6#
- 1...Rf8
- 2.Rd6#
- 1...Rg8
- 2.Rd6#
- 1...Rh8
- 2.Rd6#
- 1...Bb4
- 2.Sb6#
- 1...Bb6
- 2.Sxc3#
- 2.Sxb6#
- 1...Bc7
- 2.Sxc3#
- 1...Bh3
- 2.Qb7#
- 1...Bg4
- 2.Qb7#
- 1...Ba6
- 2.Qf5#
- 1...Be6
- 2.Qb7#
- 1...Bd7
- 2.Rd6#
- 1...c4
- 2.Bc6#
- 1...Rd2!
- 1...Bb7+
- 1.Bf1?
- Keys
- 1.Be2!
- 1...Bb7+
- 2.Qxb7#
- 1...Bxg4
- 2.Qb7#
- 1...Rd3
- 2.Qxd3#
- 1...Rd6
- 2.Rxd6#
- 1...Bf5
- 2.Qxf5#
- 2.Qb7#
- 1...Be6
- 2.Qb7#
- 1...Rd2
- 2.Qh1#
- 1...Ra1
- 2.Qd3#
- 1...Rb1
- 2.Qd3#
- 1...Rc1
- 2.Qd3#
- 1...Re1
- 2.Qd3#
- 1...Rf1
- 2.Qd3#
- 1...Rg1
- 2.Qd3#
- 1...Rh1
- 2.Qd3#
- 2.Qxh1#
- 1...Rd4
- 2.Se3#
- 1...Rd7
- 2.Qf5#
- 1...Re8
- 2.Rd6#
- 1...Rf8
- 2.Rd6#
- 1...Rg8
- 2.Rd6#
- 1...Rh8
- 2.Rd6#
- 1...Bb4
- 2.Sb6#
- 1...Bb6
- 2.Sxc3#
- 2.Sxb6#
- 1...Bc7
- 2.Sxc3#
- 1...Ba6
- 2.Qf5#
- 1...Bd7
- 2.Rd6#
- 1...c4
- 2.Bf3#
- 1...Bb7+
- 1.Be2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::QAR2(G)
- R(a);N_GUARD::QAR2(G),XR(a)
- R(a);SBLOCK::S(A)
- R(g);N_GUARD::R1(F),XR(g)
- R(g);S_CUTB(f)::QAR2(G)
- R(g);N_GUARD::R1(F)
- B(c);N_GUARD::S(B)
- B(c);N_GUARD::S(B),XP(b)
- B(f);N_GUARD,P_PINB(I),XP(D)::QAB(G)
- B(f);N_GUARD,P_PINB(I)::QAR2(G)
- B(f);N_GUARD,P_PINB(I)::QAB(G)
- B(f);CHECK,N_GUARD,P_PINB(I)::QAB(G),XB(f)
- B(f);P_PINB(I),S_CUTR(g)::R1(F)
- P(d);SBLOCK::B(E)
- Tries
- Try
- B(E);
- Threat
- QAB(G)
- Vars
- B(f);CHECK,N_GUARD,P_PINB(I)::QAB(G),XB(f)
- R(a);N_GUARD,XB(E)::QAR2(G)
- B(f);N_GUARD,P_PINB(I),XP(D)::QAB(G)
- R(a);N_GUARD::QAR2(G),XR(a)
- R(a);N_GUARD::QAR2(G)
- R(a);SBLOCK::S(A)
- R(g);N_GUARD::R1(F)
- Refutation
- R(a);
- Try
- B(E);
- Threat
- QAB1(G)
- Vars
- B(f);CHECK,N_GUARD,P_PINB(I)::QAB(G),XB(f)
- R(a);OGATE,XB(E)::QAR2(G),XR(a)
- R(g);N_GUARD::R1(F)
- Refutation
- R(a);
- Try
- R(F);CHECK
- Vars
- B(f);OGATE,P_PINB(I),XR(F)::QAR2(G),XB(f)
- Refutation
- K(e);S_FLIGHT
- Try
- R(F);
- Vars
- B(f);CHECK,N_GUARD,P_PINB(I)::QAB(G),XB(f)
- B(f);N_GUARD,P_PINB(I),XP(D)::QAB(G)
- R(a);N_GUARD::QAR2(G)
- R(a);N_GUARD::QAR2(G),XR(a)
- R(a);SBLOCK::S(A)
- R(g);N_GUARD::R1(F),XR(g)
- R(g);S_CUTB(f)::QAR2(G)
- R(g);N_GUARD::R1(F)
- B(c);N_GUARD::S(B)
- B(c);N_GUARD::S(B),XP(b)
- B(f);N_GUARD,P_PINB(I)::QAR2(G)
- B(f);N_GUARD,P_PINB(I)::QAB(G)
- B(f);P_PINB(I),S_CUTR(g)::R1(F)
- P(d);SBLOCK::B(E)
- Refutation
- R(a);
- Try
- Q(G);CHECK
- Vars
- B(f);N_GUARD,P_PINB(I),P_SPINB(f)::QAR2(G),XB(f)
- Refutation
- K(e);S_FLIGHT
- Try
- Q(G);
- Threat
- QAR1(G)
- Vars
- B(f);CHECK,N_GUARD,P_PINB(I)::QAB(G),XB(f)
- R(g);N_GUARD::R1(F)
- B(c);N_GUARD::S(B),XP(b)
- Refutation
- R(a);
- Try
- Q(G);CHECK
- Refutation
- K(e);S_FLIGHT
- Try
- P(D);
- Vars
- B(f);CHECK,N_GUARD,P_PINB(I)::QAB(G),XB(f)
- R(a);N_GUARD::QAR2(G)
- R(a);N_GUARD::QAR2(G),XR(a)
- R(a);SBLOCK::S(A)
- R(g);N_GUARD::R1(F),XR(g)
- R(g);S_CUTB(f)::QAR2(G)
- R(g);N_GUARD::R1(F)
- B(c);N_GUARD::S(B)
- B(c);N_GUARD::S(B),XP(b)
- B(f);N_GUARD,P_PINB(I)::QAB(G)
- B(f);N_GUARD,P_PINB(I)::QAR2(G)
- B(f);P_PINB(I),S_CUTR(g)::R1(F)
- P(d);SBLOCK::B(E)
- Refutation
- R(a);
- Try
- Actual
- B(E);
- Vars
- B(f);CHECK,N_GUARD,P_PINB(I)::QAB(G),XB(f)
- B(f);N_GUARD,P_PINB(I),XP(D)::QAB(G)
- R(a);N_GUARD::QAR2(G),XR(a)
- R(g);N_GUARD::R1(F),XR(g)
- B(f);N_GUARD,P_PINB(I)::QAB(G)
- R(a);N_GUARD::QAB(G)
- R(a);N_GUARD::QAR2(G)
- R(a);SBLOCK::S(A)
- R(g);S_CUTB(f)::QAR2(G)
- R(g);N_GUARD::R1(F)
- B(c);N_GUARD::S(B)
- B(c);N_GUARD::S(B),XP(b)
- B(f);N_GUARD,P_PINB(I)::QAR2(G)
- B(f);P_PINB(I),S_CUTR(g)::R1(F)
- P(d);SBLOCK::B(E)
Developed and maintained by Brian Stephenson.
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