MESON Chess Problem Database
Problem Display
PID: 64594 (n5nQ/1K1NP1r1/2R1p2b/3kp1p1/4R1p1/6N1/8/8 w - - 0 1)
White, Alain Campbell
Good Companions (April), 1921
#2
7 + 9
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Rg6
- 2.Qxe5#
- 1...Rxe7
- 2.Qxe5#
- 1...Rf7
- 2.Qxe5#
- 1...Rh7
- 2.Qxe5#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...Sf6
- 2.Sxf6#
- 1...Sxe7
- 2.Sf6#
- 1...Rg6
- Tries
- 1.Ra4?
- 1...Rxe7
- 2.Qxe5#
- 1...Sxe7
- 2.Sf6#
- 1...Sb6
- 2.Sxb6#
- 1...Rg6
- 2.Qxe5#
- 1...Rf7
- 2.Qxe5#
- 1...Rh7
- 2.Qxe5#
- 1...Sc7
- 2.Sb6#
- 1...Sf6
- 2.Sxf6#
- 1...e4!
- 1...Rxe7
- 1.Rb4?
- 1...Rxe7
- 2.Qxe5#
- 1...Sxe7
- 2.Sf6#
- 1...Sb6
- 2.Sxb6#
- 1...Rg6
- 2.Qxe5#
- 1...Rf7
- 2.Qxe5#
- 1...Rh7
- 2.Qxe5#
- 1...Sc7
- 2.Sb6#
- 1...Sf6
- 2.Sxf6#
- 1...e4!
- 1...Rxe7
- 1.Rec4?
- 1...Rxe7
- 2.Qxe5#
- 1...Sxe7
- 2.Sf6#
- 1...Sb6
- 2.Sxb6#
- 1...Rg6
- 2.Qxe5#
- 1...Rf7
- 2.Qxe5#
- 1...Rh7
- 2.Qxe5#
- 1...Sc7
- 2.Sb6#
- 1...Sf6
- 2.Sxf6#
- 1...e4!
- 1...Rxe7
- 1.Rxg4?
- 1...Rxe7
- 2.Qxe5#
- 1...Sxe7
- 2.Sf6#
- 1...Sb6
- 2.Sxb6#
- 1...Rg6
- 2.Qxe5#
- 1...Rf7
- 2.Qxe5#
- 1...Rh7
- 2.Qxe5#
- 1...Sc7
- 2.Sb6#
- 1...Sf6
- 2.Sxf6#
- 1...e4!
- 1...Rxe7
- 1.Qxg7?
- threat
- 2.Qxe5#
- 1...Sf6
- 2.Sxf6#
- 1...Bxg7!
- threat
- 1.Ra4?
- Keys
- 1.e8Q!
- threat
- 2.Qxe6#
- 1...Rxd7+
- 2.Qxd7#
- 1...Rg6
- 2.Qxe5#
- 1...Re7
- 2.Qxe5#
- 1...Sc7
- 2.Sb6#
- 1...Se7
- 2.Sf6#
- threat
- 1.e8Q!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- R(g);OGATE::QAR1(G),XP(c)
- R(g);OGATE,P_PINS(E),XP(F)::QAR1(G),XP(c)
- S(h);N_GUARD::S(E),XS(h)
- S(h);N_GUARD::S(E)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD,XP(F)::S(E)
- Tries
- Try
- R(B);
- Vars
- R(g);OGATE,P_PINS(E),XP(F)::QAR1(G),XP(c)
- S(i);N_GUARD,XP(F)::S(E)
- S(h);N_GUARD::S(E),XS(h)
- R(g);OGATE::QAR1(G),XP(c)
- S(h);N_GUARD::S(E)
- S(i);N_GUARD::S(E),XS(i)
- Refutation
- P(c);
- Try
- R(B);
- Vars
- R(g);OGATE,P_PINS(E),XP(F)::QAR1(G),XP(c)
- S(i);N_GUARD,XP(F)::S(E)
- S(h);N_GUARD::S(E),XS(h)
- R(g);OGATE::QAR1(G),XP(c)
- S(h);N_GUARD::S(E)
- S(i);N_GUARD::S(E),XS(i)
- Refutation
- P(c);
- Try
- R(B);
- Vars
- R(g);OGATE,P_PINS(E),XP(F)::QAR1(G),XP(c)
- S(i);N_GUARD,XP(F)::S(E)
- S(h);N_GUARD::S(E),XS(h)
- R(g);OGATE::QAR1(G),XP(c)
- S(h);N_GUARD::S(E)
- S(i);N_GUARD::S(E),XS(i)
- Refutation
- P(c);
- Try
- R(B);XP(a)
- Vars
- R(g);OGATE,P_PINS(E),XP(F)::QAR1(G),XP(c)
- S(i);N_GUARD,XP(F)::S(E)
- S(h);N_GUARD::S(E),XS(h)
- R(g);OGATE::QAR1(G),XP(c)
- S(h);N_GUARD::S(E)
- S(i);N_GUARD::S(E),XS(i)
- Refutation
- P(c);
- Try
- Q(G);XR(g)
- Threat
- QAR1(G),XP(c)
- Vars
- S(i);N_GUARD::S(E),XS(i)
- Refutation
- B(f);XQ(G)
- Try
- Actual
- P(F);P_SPINS(E)
- Threat
- QAB1(F),XP(e)
- Vars
- R(g);CHECK,OGATE,XS(E)::QAR2(F),XR(g)
- R(g);N_PINS(E),OGATE::QAR1(G),XP(c)
- R(g);OGATE::QAR1(G),XP(c)
- S(h);N_PINS(E)::S(E)
- S(i);N_PINS(E)::S(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).