MESON Chess Problem Database
Problem Display
PID: 64653 (3Q1RB1/1b6/qpp3p1/4N2n/p3k1Pp/7K/1Bn1NP2/8 w - - 0 1)
O'Keefe, John James
Smith, William James
Good Companions (May), 1918
#2
9 + 10
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qd3+
- 2.Qxd3#
- 1...Qa5
- 2.Qd3#
- 1...Qa7
- 2.Qd3#
- 1...Qa8
- 2.Qd3#
- 1...Sa1
- 2.Qd4#
- 1...Se1
- 2.Qd4#
- 1...Sa3
- 2.Qd4#
- 1...Se3
- 2.Qd4#
- 2.f3#
- 1...Sb4
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sg3
- 2.Rf4#
- 1...Sf4+
- 2.Rxf4#
- 1...Sg7
- 2.Rf4#
- 1...b5
- 2.Qd3#
- 1...g5
- 2.Bh7#
- 1...Qd3+
- Tries
- 1.Sf3?
- threat
- 2.Sc3#
- 2.Sd2#
- 2.Sg5#
- 1...Sf4+
- 2.Rxf4#
- 1...Qxe2
- 2.Sg5#
- 1...Sd4
- 2.Qxd4#
- 1...Sf6
- 2.Sd2#
- 2.Sg5#
- 1...Qd3
- 2.Qe7#
- 2.Qe8#
- 1...Qc4
- 2.Sd2#
- 2.Sg5#
- 1...Qb5
- 2.Sc3#
- 2.Sd2#
- 1...g5
- 2.Sc3#
- 2.Sd2#
- 2.Sxg5#
- 2.Bh7#
- 1...Qa5!
- threat
- 1.Sc4?
- threat
- 2.Sc3#
- 2.Sd2#
- 2.f3#
- 1...Sf4+
- 2.Rxf4#
- 1...Sd4
- 2.Qxd4#
- 1...Sf6
- 2.Sd2#
- 1...Qa5
- 2.f3#
- 1...Se1
- 2.Sc3#
- 2.Sd2#
- 2.Qd4#
- 1...Qxc4!
- threat
- 1.Bc4?
- threat
- 2.Qd3#
- 1...Sf4+
- 2.Rxf4#
- 1...Sd4
- 2.Qxd4#
- 1...Se1
- 2.Qd4#
- 1...Sb4
- 2.Qd4#
- 1...Qxc4!
- threat
- 1.Bh7?
- threat
- 2.Bxg6#
- 1...Qd3+
- 2.Qxd3#
- 1...Sf4+
- 2.Rxf4#
- 1...Sd4
- 2.Qxd4#
- 1...Se3
- 2.Qd4#
- 2.f3#
- 1...Sg3
- 2.Rf4#
- 1...Sg7
- 2.Rf4#
- 1...Bc8!
- threat
- 1.Qg5?
- threat
- 2.Qxg6#
- 2.f3#
- 1...Sf4+
- 2.Rxf4#
- 2.Qxf4#
- 1...Qxe2
- 2.Qxg6#
- 1...Bc8
- 2.f3#
- 1...Se1
- 2.Qe3#
- 2.Qxg6#
- 1...Se3
- 2.Qxe3#
- 2.f3#
- 1...Sd4
- 2.Sc3#
- 2.Qe3#
- 1...Sg3
- 2.Rf4#
- 2.Qf4#
- 2.f3#
- 1...Sg7
- 2.Rf4#
- 2.Qf4#
- 2.f3#
- 1...Qd3+!
- threat
- 1.Qd1?
- threat
- 2.Qh1#
- 1...Qd3+
- 2.Qxd3#
- 1...Sf4+
- 2.Rxf4#
- 1...Sd4
- 2.Qxd4#
- 1...Se1
- 2.Qd4#
- 1...Se3
- 2.Qd4#
- 2.f3#
- 1...Sg3
- 2.Rf4#
- 1...Qxe2!
- threat
- 1.Qd2?
- threat
- 2.f3#
- 1...Qd3+
- 2.Qxd3#
- 1...Sf4+
- 2.Rxf4#
- 2.Qxf4#
- 1...Sd4
- 2.Qe3#
- 2.Qxd4#
- 1...Se1
- 2.Qe3#
- 2.Qd4#
- 1...Qxe2!
- threat
- 1.Qd6?
- threat
- 2.Sc3#
- 2.Qxg6#
- 1...Qd3+
- 2.Qxd3#
- 1...Sf4+
- 2.Rxf4#
- 1...Qxe2
- 2.Qxg6#
- 1...Qc4
- 2.Qxg6#
- 1...Qa5
- 2.Qd3#
- 2.Qxg6#
- 1...Bc8
- 2.Sc3#
- 2.Qxc6#
- 1...Se3
- 2.Sc3#
- 2.Qd4#
- 2.f3#
- 1...Sd4
- 2.Sc3#
- 2.Qxd4#
- 1...Sg3
- 2.Sc3#
- 2.Rf4#
- 1...Sg7
- 2.Sc3#
- 2.Rf4#
- 1...g5
- 2.Sc3#
- 2.Bh7#
- 2.Qg6#
- 1...Sf6!
- threat
- 1.Sf3?
- Keys
- 1.Qe8!
- threat
- 2.Qxg6#
- 1...Qd3+
- 2.Sf3#
- 1...Sf4+
- 2.Rxf4#
- 1...Bc8
- 2.Qxc6#
- 1...Se3
- 2.f3#
- 1...Sd4
- 2.Sc3#
- 1...Sg3
- 2.Rf4#
- 1...Sg7
- 2.Rf4#
- 1...g5
- 2.Qg6#
- threat
- 1.Qe8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- Q(f);CHECK,N_GUARD::QAB1(G),XQ(f)
- Q(f);N_GUARD::QAB1(G)
- S(a);N_GUARD::QAR1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(e);N_GUARD::R1(H)
- S(e);CHECK,N_GUARD::R1(H),XS(e)
- P(g);S_CUTQ(f)::QAB1(G)
- P(i);OGATEB::B(I)
- Tries
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- S(e);CHECK,N_GUARD::R1(H),XS(e)
- Q(f);XS(B)::S(F)
- S(a);N_GUARD::QAR1(G),XS(a)
- Refutation
- Q(f);
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- S(e);CHECK,N_GUARD::R1(H),XS(e)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(e);::S(F)
- Q(f);::P(C)
- Refutation
- Q(f);XS(F)
- Try
- B(I);
- Threat
- QAB1(G)
- Vars
- S(e);CHECK,N_GUARD::R1(H),XS(e)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(a);N_GUARD::QAR1(G)
- Refutation
- Q(f);XB(I)
- Try
- B(I);P_PINP(i)
- Threat
- B(I),XP(i)
- Vars
- Q(f);CHECK,N_GUARD::QAB1(G),XQ(f)
- S(e);CHECK,N_GUARD::R1(H),XS(e)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(e);N_GUARD::R1(H)
- Refutation
- B(j);P_PINP(E)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- Q(f);XS(B)::QAB(G),XP(i)
- B(j);P_PINP(E)::P(C)
- Refutation
- Q(f);CHECK
- Try
- Q(G);
- Threat
- QAB(G)
- Vars
- Q(f);CHECK,N_GUARD::QAB1(G),XQ(f)
- S(e);CHECK,N_GUARD::R1(H),XS(e)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(a);N_GUARD::QAR1(G)
- S(e);N_GUARD::R1(H)
- Refutation
- Q(f);XS(B)
- Try
- Q(G);
- Threat
- P(C)
- Vars
- Q(f);CHECK,N_GUARD::QAB1(G),XQ(f)
- Refutation
- Q(f);XS(B)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,N_GUARD::QAB1(G),XQ(f)
- S(e);CHECK,N_GUARD::R1(H),XS(e)
- Q(f);XS(B)::QAB(G),XP(i)
- Q(f);::QAB(G),XP(i)
- Refutation
- S(e);
- Try
- Actual
- Q(G);
- Threat
- QAB(G),XP(i)
- Vars
- Q(f);CHECK,SBLOCK::QAR(G)+S(F)
- S(e);CHECK,N_GUARD::R1(H),XS(e)
- B(j);N_GUARD,P_PINP(E)::QAB(G),XP(h)
- S(a);SBLOCK::P(C)
- S(a);SBLOCK::S(B)
- S(e);N_GUARD::R1(H)
- P(i);::QAB(G)
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