MESON Chess Problem Database
Problem Display
PID: 21673 (4rN2/4PP1R/3P1k2/2p1pp1n/q5QK/4B2n/5R1N/1b1B1r2 w - - 0 1)
Heydon, Joseph Kentigern
Good Companions (January), 1920
#2
11 + 10
| 3132 | The Good Companion Two-Mover | 1922 |
| 78 | Bulletin Ouvrier des Echecs | 1953 |
| 5308 | La genialita compositiva di Giorgio Guidelli | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Qxd1
- 2.Qg6#
- 2.fxe8S#
- 1...Qc2
- 2.Qg6#
- 2.fxe8S#
- 1...Qb3
- 2.Qg6#
- 2.fxe8S#
- 1...Qb5
- 2.Qg6#
- 1...Qc6
- 2.Qg6#
- 1...Qd7
- 2.Qg6#
- 1...Qa1
- 2.Qg6#
- 2.fxe8S#
- 1...Qa2
- 2.Qg6#
- 2.fxe8S#
- 1...Qa3
- 2.Qg6#
- 2.fxe8S#
- 1...Qb4
- 2.fxe8S#
- 1...Qc4
- 2.fxe8S#
- 1...Qd4
- 2.fxe8S#
- 1...Qe4
- 2.fxe8S#
- 1...Qf4
- 2.fxe8S#
- 1...Qxg4+
- 2.Sxg4#
- 1...Qa5
- 2.Qg6#
- 2.fxe8S#
- 1...Qa6
- 2.Qg6#
- 2.fxe8S#
- 1...Qa7
- 2.Qg6#
- 2.fxe8S#
- 1...Qa8
- 2.Qg6#
- 1...Rd8
- 2.exd8Q#
- 2.exd8B#
- 1...Be4
- 2.Qg6#
- 1...Sg1
- 2.Bg5#
- 1...Sxf2
- 2.Bg5#
- 1...S3f4
- 2.Qg5#
- 1...Sg5
- 2.Bxg5#
- 1...S5f4
- 2.Qg7#
- 1...c4
- 2.Qg6#
- 1...e4
- 2.Qxf5#
- 1...f4
- 2.Qe6#
- 1...Qxd1
- Tries
- 1.Bxa4?
- threat
- 2.Qg6#
- 2.fxe8S#
- 1...Rxe7
- 2.Qg6#
- 1...Sg7
- 2.Qg6#
- 2.Qxg7#
- 1...e4
- 2.Qxf5#
- 1...Rg1
- 2.fxe8S#
- 1...Ra8
- 2.Qg6#
- 1...Rb8
- 2.Qg6#
- 1...Rc8
- 2.Qg6#
- 1...Rd8
- 2.Qg6#
- 2.exd8Q#
- 2.exd8B#
- 1...S3f4
- 2.Qg5#
- 2.fxe8S#
- 1...Sg5
- 2.Bxg5#
- 2.Qxg5#
- 2.fxe8S#
- 1...S5f4
- 2.Qg7#
- 2.fxe8S#
- 1...f4
- 2.Sd7#
- 2.Qe6#
- 2.fxe8S#
- 1...Rxf8!
- threat
- 1.fxe8Q?
- threat
- 2.Rh6#
- 2.Rf7#
- 2.Qg6#
- 2.Qf7#
- 1...Qxg4+
- 2.Sxg4#
- 1...e4
- 2.Qxf5#
- 1...Qb3
- 2.Rh6#
- 2.Qeg6#
- 2.Qgg6#
- 1...Qa2
- 2.Rh6#
- 2.Qeg6#
- 2.Qgg6#
- 1...Qc4
- 2.Rh6#
- 2.Qg6#
- 1...Qf4
- 2.Rf7#
- 2.Qg6#
- 2.Qf7#
- 1...Ba2
- 2.Rh6#
- 2.Qg6#
- 1...S3f4
- 2.Rf7#
- 2.Qf7#
- 2.Qg5#
- 1...Sg5
- 2.Bxg5#
- 2.Qg6#
- 1...S5f4
- 2.Rf7#
- 2.Qf7#
- 2.Qg7#
- 1...Sg7
- 2.Rh6#
- 2.Qg6#
- 1...f4
- 2.Rf7#
- 2.Qe6#
- 2.Qf7#
- 1...Qxe8!
- threat
- 1.fxe8B?
- threat
- 2.Rh6#
- 2.Rf7#
- 1...Qxg4+
- 2.Sxg4#
- 1...e4
- 2.Qxf5#
- 1...Qb3
- 2.Rh6#
- 2.Qg6#
- 1...Qa2
- 2.Rh6#
- 2.Qg6#
- 1...Qc4
- 2.Rh6#
- 1...Qf4
- 2.Rf7#
- 1...Ba2
- 2.Rh6#
- 1...S3f4
- 2.Rf7#
- 2.Qg5#
- 1...Sg5
- 2.Bxg5#
- 1...S5f4
- 2.Rf7#
- 2.Qg7#
- 1...Sg7
- 2.Rh6#
- 1...f4
- 2.Rf7#
- 2.Qe6#
- 1...Qxe8!
- threat
- 1.Bxa4?
- Keys
- 1.Bb3!
- threat
- 2.Rh6#
- 1...Qxg4+
- 2.Sxg4#
- 1...Qxb3
- 2.Qg6#
- 2.fxe8S#
- 1...e4
- 2.Qxf5#
- 1...Qc4
- 2.fxe8S#
- 1...Qf4
- 2.Sd7#
- 2.fxe8S#
- 1...S3f4
- 2.Qg5#
- 1...Sg5
- 2.Bxg5#
- 1...S5f4
- 2.Qg7#
- 1...c4
- 2.Qg6#
- 1...f4
- 2.Qe6#
- threat
- 1.Bb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 11
- Sets
- Q(d);N_PINQ(E)::QAR1(E)
- Q(d);N_GUARD::PXR(j)=S
- Q(d);N_GUARD,N_SPINP(g)::PXR(j)=S
- Q(d);CHECK,XQ(E)::S(C),XQ(d)
- R(j);OGATE::PXR(j)=Q
- B(a);N_PINQ(E)::QAR1(E)
- S(c);N_GUARD::B(D)
- S(c);N_GUARD,N_SPINP(g),XR(B)::B(D)
- S(c);N_PINQ(E),N_SPINP(g)::QAB1(E)
- S(c);N_GUARD::B(D),XS(c)
- S(h);N_PINQ(E),N_SPINP(g)::QAB1(E)
- P(e);N_PINQ(E)::QAR1(E)
- P(f);N_PINQ(E)::QAR1(E),XP(g)
- P(g);N_PINQ(E)::QAR1(E)
- Tries
- Try
- B(A);N_SPINQ(E),XQ(d)
- Threat
- DUALS(2)
- Vars
- R(j);XP(H)::QAR1(E)
- P(f);S_CUTB(a)::QAR1(E),XP(g)
- R(b);::PXR(j)=S
- R(j);::QAR1(E)
- Refutation
- R(j);XS(K)
- Try
- P(I);XR(j)
- Threat
- DUALS(4)
- Vars
- Q(d);CHECK,XQ(E)::S(C),XQ(d)
- P(f);N_PINQ(E)::QAR1(E),XP(g)
- Refutation
- Q(d);N_PINQ(E),XQ(I)
- Try
- P(I);XR(j)
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,XQ(E)::S(C),XQ(d)
- P(f);N_PINQ(E)::QAR1(E),XP(g)
- Q(d);::R(J)
- Q(d);N_SPINP(g)::R1(J)
- B(a);::R(J)
- S(c);N_GUARD::B(D),XS(c)
- S(h);::R(J)
- Refutation
- Q(d);N_PINQ(E),XB(I)
- Try
- Actual
- B(A);
- Threat
- R(J)
- Vars
- Q(d);CHECK,XQ(E)::S(C),XQ(d)
- P(f);N_PINQ(E)::QAR1(E),XP(g)
- Q(d);N_GUARD::PXR(j)=S
- S(c);N_PINQ(E),N_SPINP(g)::QAB1(E)
- S(c);N_GUARD::B(D),XS(c)
- S(h);N_PINQ(E),N_SPINP(g)::QAB1(E)
- P(e);N_PINQ(E)::QAR1(E)
- P(g);N_PINQ(E)::QAR1(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).