MESON Chess Problem Database
Problem Display
PID: 64595 (2qQ4/Pb1pP3/r1k1N1n1/R1B5/4K1N1/8/2n5/8 w - - 0 1)
White, Alain Campbell
Good Companions (April), 1921
#2
8 + 7
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qc7
- 2.Qxc7#
- 1...Qa8
- 2.Qc7#
- 1...Qb8
- 2.axb8S#
- 1...Qxd8
- 2.exd8S#
- 1...Rxa5
- 2.Qb6#
- 1...Rb6
- 2.Qxb6#
- 1...Rxa7
- 2.Qb6#
- 1...Ba8
- 2.Qxc8#
- 1...Sa1
- 2.Sd4#
- 1...Se1
- 2.Sd4#
- 1...Sa3
- 2.Sd4#
- 1...Se3
- 2.Sd4#
- 1...Sb4
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sf4
- 2.Se5#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Sxe7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...dxe6
- 2.Qd6#
- 1...d5+
- 2.Qxd5#
- 1...d6
- 2.Qxd6#
- 1...Qc7
- Tries
- 1.Rxa6+?
- 1...Bxa6
- 2.Qb6#
- 1...Kb5+!
- 1...Bxa6
- 1.a8Q?
- threat
- 2.Qdxc8#
- 1...d5+
- 2.Qxd5#
- 1...Qxa8
- 2.Qc7#
- 1...Qxd8
- 2.exd8S#
- 1...Rxa5
- 2.Qb6#
- 1...Rxa8
- 2.Qb6#
- 1...Sxe7
- 2.Se5#
- 1...Qc7
- 2.Qxc7#
- 1...Qb8!
- threat
- 1.a8S?
- 1...d5+
- 2.Qxd5#
- 1...Qxa8
- 2.Qc7#
- 1...Qxd8
- 2.Sxd8#
- 2.exd8S#
- 1...Rxa5
- 2.Qb6#
- 1...Rxa8
- 2.Qb6#
- 1...Bxa8
- 2.Qxc8#
- 1...Sxe7
- 2.Se5#
- 1...dxe6
- 2.Qd6#
- 1...Sf4
- 2.Se5#
- 1...Qc7
- 2.Qxc7#
- 1...Rb6
- 2.Qxb6#
- 1...Ra7
- 2.Qb6#
- 1...Sa1
- 2.Sd4#
- 1...Se1
- 2.Sd4#
- 1...Sa3
- 2.Sd4#
- 1...Se3
- 2.Sd4#
- 1...Sb4
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...d6
- 2.Qxd6#
- 1...Qb8!
- 1...d5+
- 1.a8B?
- threat
- 2.Qxc8#
- 1...d5+
- 2.Qxd5#
- 1...Qxa8
- 2.Qc7#
- 1...Qxd8
- 2.exd8S#
- 1...Rxa5
- 2.Qb6#
- 1...Rxa8
- 2.Qb6#
- 1...Sxe7
- 2.Se5#
- 1...Qc7
- 2.Qxc7#
- 1...Qb8!
- threat
- 1.a8R?
- 1...d5+
- 2.Qxd5#
- 1...Qxa8
- 2.Qc7#
- 1...Qxd8
- 2.exd8S#
- 1...Rxa5
- 2.Qb6#
- 1...Rxa8
- 2.Qb6#
- 1...Bxa8
- 2.Qxc8#
- 1...Sxe7
- 2.Se5#
- 1...dxe6
- 2.Qd6#
- 1...Sf4
- 2.Se5#
- 1...Qc7
- 2.Qxc7#
- 1...Rb6
- 2.Qxb6#
- 1...Ra7
- 2.Qb6#
- 1...Sa1
- 2.Sd4#
- 1...Se1
- 2.Sd4#
- 1...Sa3
- 2.Sd4#
- 1...Se3
- 2.Sd4#
- 1...Sb4
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...d6
- 2.Qxd6#
- 1...Qb8!
- 1...d5+
- 1.e8Q?
- 1...Rxa5
- 2.Qb6#
- 1...Rxa7
- 2.Qb6#
- 1...Ba8
- 2.Qxc8#
- 1...Sf4
- 2.Se5#
- 1...Qc7
- 2.Qxc7#
- 1...Qa8
- 2.Qc7#
- 2.Qexd7#
- 2.Qdxd7#
- 1...Qb8
- 2.Qexd7#
- 2.Qdxd7#
- 2.axb8S#
- 1...Rb6
- 2.Qxb6#
- 1...Sa1
- 2.Sd4#
- 1...Se1
- 2.Sd4#
- 1...Sa3
- 2.Sd4#
- 1...Se3
- 2.Sd4#
- 1...Sb4
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...Qxd8!
- 1...Rxa5
- 1.e8B?
- 1...Rxa5
- 2.Qb6#
- 1...Rxa7
- 2.Qb6#
- 1...Ba8
- 2.Qxc8#
- 1...Sf4
- 2.Se5#
- 1...Qc7
- 2.Qxc7#
- 1...Qa8
- 2.Bxd7#
- 2.Qc7#
- 2.Qxd7#
- 1...Qb8
- 2.Bxd7#
- 2.Qxd7#
- 2.axb8S#
- 1...Rb6
- 2.Qxb6#
- 1...Sa1
- 2.Sd4#
- 1...Se1
- 2.Sd4#
- 1...Sa3
- 2.Sd4#
- 1...Se3
- 2.Sd4#
- 1...Sb4
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...Qxd8!
- 1...Rxa5
- 1.e8R?
- 1...d5+
- 2.Qxd5#
- 1...Rxa5
- 2.Qb6#
- 1...Rxa7
- 2.Qb6#
- 1...dxe6
- 2.Qd6#
- 1...Ba8
- 2.Qxc8#
- 1...Sf4
- 2.Se5#
- 1...Qc7
- 2.Qxc7#
- 1...Qa8
- 2.Qc7#
- 1...Qb8
- 2.axb8S#
- 1...Rb6
- 2.Qxb6#
- 1...Sa1
- 2.Sd4#
- 1...Se1
- 2.Sd4#
- 1...Sa3
- 2.Sd4#
- 1...Se3
- 2.Sd4#
- 1...Sb4
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...d6
- 2.Qxd6#
- 1...Qxd8!
- 1...d5+
- 1.Rxa6+?
- Keys
- 1.e8S!
- 1...d5+
- 2.Qxd5#
- 1...Qxd8
- 2.Sxd8#
- 1...Rxa5
- 2.Qb6#
- 1...Rxa7
- 2.Qb6#
- 1...dxe6
- 2.Qd6#
- 1...Ba8
- 2.Qxc8#
- 1...Sf4
- 2.Se5#
- 1...Qc7
- 2.Qxc7#
- 1...Qa8
- 2.Qc7#
- 1...Qb8
- 2.axb8S#
- 1...Rb6
- 2.Qxb6#
- 1...Sa1
- 2.Sd4#
- 1...Se1
- 2.Sd4#
- 1...Sa3
- 2.Sd4#
- 1...Se3
- 2.Sd4#
- 1...Sb4
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...d6
- 2.Qxd6#
- 1...d5+
- 1.e8S!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(g);N_GUARD::QAR1(H),XQ(g)
- Q(g);N_GUARD::QAR1(H)
- Q(g);OGATE::PXQ(g)=S
- Q(g);OGATE,XQ(H)::PXQ(g)=S
- R(b);N_GUARD,XR(C)::QAR1(H)
- R(b);N_GUARD::QAR1(H),XR(b)
- R(b);N_GUARD,XP(F)::QAR1(H)
- B(e);N_GUARD::QAR2(H),XQ(g)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::S(B)
- S(d);N_GUARD::S(B),XS(d)
- S(d);N_GUARD,XP(G)::S(B)
- P(f);OGATE,XS(E)::QAR1(H)
- P(f);CHECK,OGATE::QAB1(H),XP(f)
- P(f);OGATE::QAR1(H),XP(f)
- Tries
- Try
- R(C);CHECK,XR(b)
- Vars
- B(e);XR(C)::QAR1(H)
- Refutation
- K(c);CHECK,S_FLIGHT
- Try
- P(F);P_PINB(e)
- Threat
- QAR2(H),XQ(g)
- Vars
- P(f);CHECK,OGATE::QAB1(H),XP(f)
- Q(g);N_GUARD,N_SPINB(e),XQ(F)::QAR1(H)
- Q(g);OGATE,XQ(H)::PXQ(g)=S
- R(b);N_GUARD,XR(C)::QAR1(H)
- R(b);N_GUARD,N_SPINB(e),XQ(F)::QAR1(H)
- S(d);N_GUARD,XP(G)::S(B)
- Q(g);N_GUARD::QAR1(H),XQ(g)
- Refutation
- Q(g);
- Try
- P(F);
- Vars
- P(f);CHECK,OGATE::QAB1(H),XP(f)
- Q(g);N_GUARD,XS(F)::QAR1(H)
- R(b);N_GUARD,XR(C)::QAR1(H)
- R(b);N_GUARD,XS(F)::QAR1(H)
- B(e);N_GUARD,XS(F)::QAR2(H),XQ(g)
- S(d);N_GUARD,XP(G)::S(B)
- P(f);OGATE,XS(E)::QAR1(H)
- S(d);N_GUARD::S(B)
- Q(g);N_GUARD::QAR1(H),XQ(g)
- R(b);N_GUARD::QAR1(H),XR(b)
- R(b);N_GUARD::QAR1(H)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::S(B),XS(d)
- P(f);OGATE::QAR1(H),XP(f)
- Refutation
- Q(g);
- Try
- P(F);P_PINB(e)
- Threat
- QAR2(H),XQ(g)
- Vars
- P(f);CHECK,OGATE::QAB1(H),XP(f)
- Q(g);N_GUARD,N_SPINB(e),XB(F)::QAR1(H)
- Q(g);OGATE,XQ(H)::PXQ(g)=S
- R(b);N_GUARD,XR(C)::QAR1(H)
- R(b);N_GUARD,N_SPINB(e),XB(F)::QAR1(H)
- S(d);N_GUARD,XP(G)::S(B)
- Q(g);N_GUARD::QAR1(H),XQ(g)
- Refutation
- Q(g);
- Try
- P(F);
- Vars
- P(f);CHECK,OGATE::QAB1(H),XP(f)
- Q(g);N_GUARD,XR(F)::QAR1(H)
- Q(g);OGATE,XQ(H)::PXQ(g)=S
- R(b);N_GUARD,XR(C)::QAR1(H)
- R(b);N_GUARD,XR(F)::QAR1(H)
- B(e);N_GUARD,XR(F)::QAR2(H),XQ(g)
- S(d);N_GUARD,XP(G)::S(B)
- P(f);OGATE,XS(E)::QAR1(H)
- S(d);N_GUARD::S(B)
- Q(g);N_GUARD::QAR1(H),XQ(g)
- R(b);N_GUARD::QAR1(H),XR(b)
- R(b);N_GUARD::QAR1(H)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::S(B),XS(d)
- P(f);OGATE::QAR1(H),XP(f)
- Refutation
- Q(g);
- Try
- P(G);P_PINP(f)
- Vars
- R(b);N_GUARD,XR(C)::QAR1(H)
- R(b);N_GUARD,XP(F)::QAR1(H)
- B(e);N_GUARD::QAR2(H),XQ(g)
- S(d);N_GUARD::S(B)
- Q(g);N_GUARD::QAR1(H),XQ(g)
- R(b);N_GUARD::QAR1(H),XR(b)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::S(B),XS(d)
- Refutation
- Q(g);XQ(H)
- Try
- P(G);P_PINP(f)
- Vars
- R(b);N_GUARD,XR(C)::QAR1(H)
- R(b);N_GUARD,XP(F)::QAR1(H)
- B(e);N_GUARD::QAR2(H),XQ(g)
- S(d);N_GUARD::S(B)
- Q(g);N_GUARD::QAR1(H),XQ(g)
- R(b);N_GUARD::QAR1(H),XR(b)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::S(B),XS(d)
- Refutation
- Q(g);XQ(H)
- Try
- P(G);
- Vars
- P(f);CHECK,OGATE::QAB1(H),XP(f)
- R(b);N_GUARD,XR(C)::QAR1(H)
- R(b);N_GUARD,XP(F)::QAR1(H)
- P(f);OGATE,XS(E)::QAR1(H)
- B(e);N_GUARD::QAR2(H),XQ(g)
- S(d);N_GUARD::S(B)
- Q(g);N_GUARD::QAR1(H),XQ(g)
- Q(g);N_GUARD::QAR1(H)
- Q(g);OGATE::PXQ(g)=S
- R(b);N_GUARD::QAR1(H),XR(b)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::S(B),XS(d)
- P(f);OGATE::QAR1(H),XP(f)
- Refutation
- Q(g);XQ(H)
- Try
- Actual
- P(G);
- Vars
- P(f);CHECK,OGATE::QAB1(H),XP(f)
- Q(g);XQ(H)::S(E),XQ(g)
- R(b);N_GUARD,XR(C)::QAR1(H)
- R(b);N_GUARD,XP(F)::QAR1(H)
- P(f);OGATE,XS(E)::QAR1(H)
- B(e);N_GUARD::QAR2(H),XQ(g)
- S(d);N_GUARD::S(B)
- Q(g);N_GUARD::QAR1(H),XQ(g)
- Q(g);N_GUARD::QAR1(H)
- Q(g);OGATE::PXQ(g)=S
- R(b);N_GUARD::QAR1(H),XR(b)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::S(B),XS(d)
- P(f);OGATE::QAR1(H),XP(f)
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).