MESON Chess Problem Database
Problem Display
PID: 61120 (8/q7/5B2/7Q/R1N4n/2p1p3/rR2K3/k7 w - - 0 1)
O'Keefe, John James
3rd Prize, Good Companions (February Meredith Ty.), 1917
#2
6 + 6
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qd4
- 2.Raxa2#
- 1...Qc5
- 2.Raxa2#
- 1...Qb6
- 2.Raxa2#
- 1...Qb8
- 2.Raxa2#
- 1...Qb7
- 2.Raxa2#
- 1...Qc7
- 2.Raxa2#
- 1...Qd7
- 2.Raxa2#
- 1...Qe7
- 2.Raxa2#
- 1...Qf7
- 2.Raxa2#
- 1...Qg7
- 2.Raxa2#
- 1...Qh7
- 2.Raxa2#
- 1...Sf5
- 2.Qh1#
- 1...Sg6
- 2.Qh1#
- 1...c2
- 2.Rb6#
- 1...Qd4
- Tries
- 1.Qg6?
- threat
- 2.Rbxa2#
- 2.Qb1#
- 2.Qg1#
- 1...Qxa4
- 2.Qb1#
- 1...Rxa4
- 2.Qb1#
- 2.Qg1#
- 1...cxb2
- 2.Bxb2#
- 2.Qg1#
- 1...Qd4
- 2.Rbxa2#
- 2.Raxa2#
- 2.Qb1#
- 1...Qd7
- 2.Rbxa2#
- 2.Raxa2#
- 2.Qb1#
- 1...Qg7
- 2.Rbxa2#
- 2.Raxa2#
- 2.Qb1#
- 1...Qh7
- 2.Rbxa2#
- 2.Raxa2#
- 1...Ra3
- 2.Qb1#
- 2.Qg1#
- 1...Sg2
- 2.Rbxa2#
- 2.Qb1#
- 1...Sf3
- 2.Rbxa2#
- 2.Qb1#
- 1...Sf5
- 2.Qg1#
- 1...c2
- 2.Rb6#
- 1...Sxg6!
- threat
- 1.Qxh4?
- threat
- 2.Qe1#
- 2.Qh1#
- 1...Qd4
- 2.Raxa2#
- 1...Qb7
- 2.Raxa2#
- 2.Qe1#
- 1...Qd7
- 2.Raxa2#
- 1...Qg7
- 2.Raxa2#
- 2.Qe1#
- 1...Qh7
- 2.Raxa2#
- 1...Qa8
- 2.Qe1#
- 1...c2
- 2.Rb6#
- 1...Qxa4!
- threat
- 1.Qd5?
- threat
- 2.Qh1#
- 2.Qd1#
- 1...Qd4
- 2.Raxa2#
- 1...Qb7
- 2.Raxa2#
- 2.Qd1#
- 1...Qd7
- 2.Raxa2#
- 1...Qg7
- 2.Raxa2#
- 2.Qd1#
- 1...Qh7
- 2.Raxa2#
- 1...Qa8
- 2.Qd1#
- 1...Sg2
- 2.Qd1#
- 1...Sf3
- 2.Qd1#
- 1...c2
- 2.Rb6#
- 1...Qxa4!
- threat
- 1.Qf5?
- threat
- 2.Rbxa2#
- 2.Qb1#
- 2.Qf1#
- 1...Qxa4
- 2.Qb1#
- 1...Rxa4
- 2.Qb1#
- 2.Qf1#
- 1...cxb2
- 2.Bxb2#
- 2.Qf1#
- 1...Qd4
- 2.Rbxa2#
- 2.Raxa2#
- 2.Qb1#
- 1...Qd7
- 2.Rbxa2#
- 2.Raxa2#
- 2.Qb1#
- 1...Qh7
- 2.Rbxa2#
- 2.Raxa2#
- 1...Ra3
- 2.Qb1#
- 2.Qf1#
- 1...Sg2
- 2.Rbxa2#
- 2.Qb1#
- 1...Sf3
- 2.Rbxa2#
- 2.Qb1#
- 1...c2
- 2.Rb6#
- 1...Sxf5!
- threat
- 1.Qg6?
- Keys
- 1.Qh7!
- threat
- 2.Rbxa2#
- 2.Qb1#
- 1...Qxa4
- 2.Qb1#
- 1...Qxh7
- 2.Raxa2#
- 1...Rxa4
- 2.Qb1#
- 1...cxb2
- 2.Bxb2#
- 1...Ra3
- 2.Qb1#
- 1...Sf5
- 2.Qh1#
- 1...Sg6
- 2.Qh1#
- 1...c2
- 2.Rb6#
- threat
- 1.Qh7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 10
- Sets
- Q(f);N_GUARD::R1(C),XR(b)
- S(e);OGATE::QAB1(E)
- P(c);N_PINR(A)::B(F)+R(A)
- Tries
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(f);N_SPINR(b),XR(C)::QAR1(E)
- S(e);::QAR(E)
- P(c);N_PINR(A)::B(F)+R(A)
- Refutation
- S(e);XQ(E)
- Try
- Q(E);XS(e)
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD::R1(C),XR(b)
- Q(f);::QAR(E)
- P(c);N_PINR(A)::B(F)+R(A)
- Refutation
- Q(f);N_SPINR(b),XR(C)
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD::R1(C),XR(b)
- Q(f);::QAR(E)
- S(e);::QAR(E)
- P(c);N_PINR(A)::B(F)+R(A)
- Refutation
- Q(f);N_SPINR(b),XR(C)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(f);N_SPINR(b),XR(C)::QAR1(E)
- P(c);N_PINR(A)::B(F)+R(A)
- Refutation
- S(e);XQ(E)
- Try
- Actual
- Q(E);
- Threat
- DUALS(2)
- Vars
- Q(f);N_SPINR(b),XR(C)::QAR1(E)
- Q(f);N_GUARD,XQ(E)::R1(C),XR(b)
- R(b);N_PINR(A),N_SPINR(b),XR(C)::QAR1(E)
- P(c);OGATE,P_SPINP(c),XR(A)::B(F),XP(c)
- R(b);N_PINR(A)::QAR1(E)
- S(e);OGATE::QAB1(E)
- P(c);N_PINR(A)::B(F)+R(A)
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).