MESON Chess Problem Database
Problem Display
PID: 200936 (q3r3/3N2p1/BB3RPn/2Q3p1/r3kNp1/6P1/6P1/1b2Kn2 w - - 0 1)
Grimshaw, V
Stewart, John
The Observer, 1949
(First published on Sun Feb 20 1949)
#2
10 + 10
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.Qxd5#
- 1...Qc6
- 2.Qxc6#
- 1...Qb7
- 2.Bxb7#
- 1...Qxa6
- 2.Qd5#
- 2.Qc6#
- 1...Qa7
- 2.Qd5#
- 2.Qc6#
- 1...Qb8
- 2.Qd5#
- 2.Qc6#
- 1...Qc8
- 2.Qd5#
- 1...Qd8
- 2.Bb7#
- 2.Qd5#
- 2.Qc6#
- 1...Ra1
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Ra2
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Ra3
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Qxd4#
- 1...Ra5
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Rxa6
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Re5
- 2.Qxe5#
- 1...Re6
- 2.Rxe6#
- 1...Re7
- 2.Qxe7#
- 1...Rb8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rc8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rd8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rf8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rg8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rh8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Ba2
- 2.Bd3#
- 2.Qc2#
- 1...Bc2
- 2.Qxc2#
- 1...Bd3
- 2.Bxd3#
- 1...Sd2
- 2.Qe3#
- 1...Sh2
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sxg3
- 2.Qe3#
- 1...Sf5
- 2.Qxf5#
- 1...Sf7
- 2.Qf5#
- 1...Sg8
- 2.Qf5#
- 1...gxf4
- 2.Rxf4#
- 1...gxf6
- 2.Sxf6#
- 1...Qd5
- Tries
- 1.Kxf1?
- threat
- 2.Qe3#
- 1...Bd3+
- 2.Bxd3#
- 1...gxf4
- 2.Rxf4#
- 1...gxf6
- 2.Sxf6#
- 1...Rd4
- 2.Qxd4#
- 1...Ra3
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Sf5
- 2.Qxf5#
- 1...Qxa6+!
- threat
- 1.Kf2?
- 1...Qxa6
- 2.Qd5#
- 2.Qc6#
- 1...Rxa6
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Sxg3
- 2.Qe3#
- 1...gxf4
- 2.Rxf4#
- 1...gxf6
- 2.Sxf6#
- 1...Qd5
- 2.Qxd5#
- 1...Qc6
- 2.Qxc6#
- 1...Qb7
- 2.Bxb7#
- 1...Qa7
- 2.Qd5#
- 2.Qc6#
- 1...Qb8
- 2.Qd5#
- 2.Qc6#
- 1...Qc8
- 2.Qd5#
- 1...Qd8
- 2.Bb7#
- 2.Qd5#
- 2.Qc6#
- 1...Ra1
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Ra3
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Qxd4#
- 1...Ra5
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Re5
- 2.Qxe5#
- 1...Re6
- 2.Rxe6#
- 1...Re7
- 2.Qxe7#
- 1...Rb8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rc8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rd8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rf8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rg8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rh8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Ba2
- 2.Bd3#
- 2.Qc2#
- 1...Bc2
- 2.Qxc2#
- 1...Bd3
- 2.Bxd3#
- 1...Sd2
- 2.Qe3#
- 1...Sh2
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sf5
- 2.Qxf5#
- 1...Sf7
- 2.Qf5#
- 1...Sg8
- 2.Qf5#
- 1...Ra2+!
- 1...Qxa6
- 1.Se2?
- threat
- 2.Sc3#
- 1...Rxa6
- 2.Qd4#
- 2.Qc4#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Qxd4#
- 1...Ra3
- 2.Qd4#
- 2.Qc4#
- 1...Qxa6!
- threat
- 1.Sd3?
- threat
- 2.Sf2#
- 1...Rd4
- 2.Qxd4#
- 1...Ra2
- 2.Qd4#
- 2.Qc4#
- 1...Bxd3!
- threat
- 1.Sh3?
- threat
- 2.Sf2#
- 2.Sxg5#
- 1...Qxa6
- 2.Sf2#
- 1...Rxa6
- 2.Sf2#
- 2.Qd4#
- 2.Qc4#
- 1...gxf6
- 2.Sf2#
- 2.Sxf6#
- 1...Rc4
- 2.Sf2#
- 2.Qxc4#
- 1...Rd4
- 2.Qxd4#
- 1...Qd5
- 2.Sf2#
- 1...Ra2
- 2.Sxg5#
- 2.Qd4#
- 2.Qc4#
- 1...Re5
- 2.Sf2#
- 2.Qxe5#
- 1...Sf7
- 2.Sf2#
- 2.Qf5#
- 1...gxh3!
- threat
- 1.Bxf1?
- threat
- 2.Qe3#
- 1...gxf4
- 2.Rxf4#
- 1...gxf6
- 2.Sxf6#
- 1...Rd4
- 2.Qxd4#
- 1...Ra3
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Sf5
- 2.Qxf5#
- 1...Qa5+!
- threat
- 1.Bc4?
- threat
- 2.Qd4#
- 1...Rxc4
- 2.Qxc4#
- 1...gxf6
- 2.Sxf6#
- 1...Qd5
- 2.Bxd5#
- 2.Qxd5#
- 1...Sf5
- 2.Qxf5#
- 1...Qa5+!
- threat
- 1.Ba7?
- 1...Rxa6
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Sxg3
- 2.Qe3#
- 1...gxf4
- 2.Rxf4#
- 1...gxf6
- 2.Sxf6#
- 1...Rd4
- 2.Qxd4#
- 1...Qd5
- 2.Qxd5#
- 1...Qc6
- 2.Qxc6#
- 1...Qb7
- 2.Bxb7#
- 1...Qb8
- 2.Qd5#
- 2.Qc6#
- 1...Qc8
- 2.Qd5#
- 1...Qd8
- 2.Bb7#
- 2.Qd5#
- 2.Qc6#
- 1...Ra1
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Ra2
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Ra3
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...Ra5
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Re5
- 2.Qxe5#
- 1...Re6
- 2.Rxe6#
- 1...Re7
- 2.Qxe7#
- 1...Rb8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rc8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rd8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rf8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rg8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rh8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Ba2
- 2.Bd3#
- 2.Qc2#
- 1...Bc2
- 2.Qxc2#
- 1...Bd3
- 2.Bxd3#
- 1...Sd2
- 2.Qe3#
- 1...Sh2
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sf5
- 2.Qxf5#
- 1...Sf7
- 2.Qf5#
- 1...Sg8
- 2.Qf5#
- 1...Qxa7!
- 1...Rxa6
- 1.Kxf1?
- Keys
- 1.Kd1!
- 1...Qd5+
- 2.Qxd5#
- 1...Rd4+
- 2.Qxd4#
- 1...Bc2+
- 2.Qxc2#
- 1...Se3+
- 2.Qxe3#
- 1...Qxa6
- 2.Qd5#
- 2.Qc6#
- 1...Rxa6
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Sxg3
- 2.Qe3#
- 1...gxf4
- 2.Rxf4#
- 1...gxf6
- 2.Sxf6#
- 1...Qc6
- 2.Qxc6#
- 1...Qb7
- 2.Bxb7#
- 1...Qa7
- 2.Qd5#
- 2.Qc6#
- 1...Qb8
- 2.Qd5#
- 2.Qc6#
- 1...Qc8
- 2.Qd5#
- 1...Qd8
- 2.Bb7#
- 2.Qd5#
- 2.Qc6#
- 1...Ra1
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Ra2
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Ra3
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...Ra5
- 2.Qb4#
- 2.Qd4#
- 2.Qc4#
- 1...Re5
- 2.Qxe5#
- 1...Re6
- 2.Rxe6#
- 1...Re7
- 2.Qxe7#
- 1...Rb8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rc8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rd8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rf8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rg8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Rh8
- 2.Re6#
- 2.Qe7#
- 2.Qe5#
- 1...Ba2
- 2.Bd3#
- 2.Qc2#
- 1...Bd3
- 2.Bxd3#
- 1...Sd2
- 2.Qe3#
- 1...Sh2
- 2.Qe3#
- 1...Sf5
- 2.Qxf5#
- 1...Sf7
- 2.Qf5#
- 1...Sg8
- 2.Qf5#
- 1...Qd5+
- 1.Kd1!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(i);N_GUARD::QAB1(E),XQ(i)
- Q(i);N_GUARD::QAB(E),XQ(i)
- Q(i);N_GUARD::B(F),XQ(i)
- Q(i);N_GUARD::QAB1(E)
- R(c);N_GUARD::QAR(E),XR(c)
- R(c);N_GUARD::QAR2(E),XR(c)
- R(c);N_GUARD::QAR1(E),XR(c)
- R(j);N_GUARD::QAR1(E),XR(j)
- R(j);N_GUARD::R(H),XR(j)
- R(j);N_GUARD::QAR(E),XR(j)
- B(a);N_GUARD::QAB(E),XB(a)
- B(a);N_GUARD::B(F),XB(a)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- S(b);N_GUARD,XP(C)::QAR1(E)
- S(g);N_GUARD::QAB1(E),XS(g)
- S(g);N_GUARD::QAB1(E)
- P(f);OGATE,XS(D)::R1(H),XP(f)
- P(h);XR(H)::S(J),XP(h)
- Tries
- Try
- K(A);P-FLIGHT,XS(b)
- Threat
- QAR1(E)
- Vars
- B(a);CHECK,N_GUARD::B(F),XB(a)
- P(f);OGATE,XS(D)::R1(H),XP(f)
- P(h);XR(H)::S(J),XP(h)
- R(c);N_GUARD::QAR1(E),XR(c)
- S(g);N_GUARD::QAB1(E),XS(g)
- Refutation
- Q(i);CHECK,XB(F)
- Try
- K(A);S_FLIGHT
- Vars
- S(b);N_GUARD,XP(C)::QAR1(E)
- P(f);OGATE,XS(D)::R1(H),XP(f)
- P(h);XR(H)::S(J),XP(h)
- Q(i);N_GUARD::QAB1(E),XQ(i)
- Q(i);N_GUARD::QAB(E),XQ(i)
- Q(i);N_GUARD::B(F),XQ(i)
- Q(i);N_GUARD::QAB1(E)
- R(c);N_GUARD::QAR(E),XR(c)
- R(c);N_GUARD::QAR2(E),XR(c)
- R(c);N_GUARD::QAR1(E),XR(c)
- R(j);N_GUARD::QAR1(E),XR(j)
- R(j);N_GUARD::R(H),XR(j)
- R(j);N_GUARD::QAR(E),XR(j)
- B(a);N_GUARD::QAB(E),XB(a)
- B(a);N_GUARD::B(F),XB(a)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- S(g);N_GUARD::QAB1(E),XS(g)
- S(g);N_GUARD::QAB1(E)
- Refutation
- R(c);CHECK
- Try
- S(D);
- Threat
- S(D)
- Vars
- R(c);N_GUARD::QAR2(E),XR(c)
- R(c);N_GUARD::QAR1(E),XR(c)
- Refutation
- Q(i);XB(F)
- Try
- S(D);
- Threat
- S(D)
- Vars
- R(c);N_GUARD::QAR1(E),XR(c)
- Refutation
- B(a);XS(D)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(i);XB(F)::S(D)
- R(c);N_GUARD::QAR1(E),XR(c)
- Q(i);::S(D)
- Refutation
- P(e);XS(D)
- Try
- B(F);XS(b)
- Threat
- QAR1(E)
- Vars
- P(f);OGATE,XS(D)::R1(H),XP(f)
- P(h);XR(H)::S(J),XP(h)
- R(c);N_GUARD::QAR1(E),XR(c)
- S(g);N_GUARD::QAB1(E),XS(g)
- Refutation
- Q(i);CHECK
- Try
- B(F);
- Threat
- QAR1(E)
- Vars
- R(c);OGATE,XB(F)::QAR2(E),XR(c)
- P(h);XR(H)::S(J),XP(h)
- S(g);N_GUARD::QAB1(E),XS(g)
- Refutation
- Q(i);CHECK
- Try
- B(G);
- Vars
- S(b);N_GUARD,XP(C)::QAR1(E)
- P(f);OGATE,XS(D)::R1(H),XP(f)
- P(h);XR(H)::S(J),XP(h)
- R(c);N_GUARD::QAR1(E),XR(c)
- Q(i);N_GUARD::QAB1(E),XQ(i)
- Q(i);N_GUARD::QAB(E),XQ(i)
- Q(i);N_GUARD::B(F),XQ(i)
- Q(i);N_GUARD::QAB1(E)
- R(c);N_GUARD::QAR(E),XR(c)
- R(c);N_GUARD::QAR2(E),XR(c)
- R(j);N_GUARD::QAR1(E),XR(j)
- R(j);N_GUARD::R(H),XR(j)
- R(j);N_GUARD::QAR(E),XR(j)
- B(a);N_GUARD::QAB(E),XB(a)
- B(a);N_GUARD::B(F),XB(a)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- S(g);N_GUARD::QAB1(E),XS(g)
- S(g);N_GUARD::QAB1(E)
- Refutation
- Q(i);XB(G)
- Try
- Actual
- K(A);P-FLIGHT
- Vars
- Q(i);CHECK,N_GUARD::QAB1(E),XQ(i)
- R(c);CHECK,N_GUARD::QAR1(E),XR(c)
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- S(b);CHECK,N_GUARD::QAR1(E),XS(b)
- S(b);N_GUARD,XP(C)::QAR1(E)
- P(f);OGATE,XS(D)::R1(H),XP(f)
- P(h);XR(H)::S(J),XP(h)
- Q(i);N_GUARD::QAB(E),XQ(i)
- Q(i);N_GUARD::B(F),XQ(i)
- Q(i);N_GUARD::QAB1(E)
- R(c);N_GUARD::QAR(E),XR(c)
- R(c);N_GUARD::QAR2(E),XR(c)
- R(j);N_GUARD::QAR1(E),XR(j)
- R(j);N_GUARD::R(H),XR(j)
- R(j);N_GUARD::QAR(E),XR(j)
- B(a);N_GUARD::B(F),XB(a)
- S(b);N_GUARD::QAR1(E)
- S(g);N_GUARD::QAB1(E),XS(g)
- S(g);N_GUARD::QAB1(E)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).