MESON Chess Problem Database
Problem Display
PID: 21517 (1N6/1Pn1R2B/1K3p1p/2BkN3/2p3pq/6P1/3b4/1n1Q4 w - - 0 1)
McAllister, George W
Good Companions (May), 1919
#2
9 + 9
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qg5
- 2.Qh1#
- 1...Qh1
- 2.Qxh1#
- 1...Sa3
- 2.Qxd2#
- 1...Sc3
- 2.Qxd2#
- 1...Sa8+
- 2.bxa8Q#
- 2.bxa8B#
- 1...c3
- 2.Qb3#
- 1...Qg5
- Tries
- 1.Sd3?
- threat
- 2.Sb4#
- 2.Sf4#
- 2.Be4#
- 1...Sa8+
- 2.bxa8Q#
- 2.bxa8B#
- 1...Qxg3
- 2.Sb4#
- 2.Be4#
- 1...cxd3
- 2.Qb3#
- 1...c3
- 2.Qb3#
- 1...Qg5
- 2.Sb4#
- 2.Be4#
- 2.Qh1#
- 1...Qh1
- 2.Sb4#
- 2.Sf4#
- 2.Qxh1#
- 1...Bb4
- 2.Sxb4#
- 2.Sf4#
- 2.Be4#
- 1...Bf4
- 2.Sb4#
- 2.Sxf4#
- 2.Be4#
- 1...Sc3
- 2.Sb4#
- 2.Sf4#
- 1...Sa6
- 2.Sf4#
- 2.Be4#
- 2.Bg8#
- 1...Se6
- 2.Rd7#
- 1...f5
- 2.Sb4#
- 2.Sf4#
- 2.Re5#
- 1...Ba5+!
- threat
- 1.Sf3?
- threat
- 2.Be4#
- 1...Sa8+
- 2.bxa8Q#
- 2.bxa8B#
- 1...c3
- 2.Qb3#
- 1...Sc3
- 2.Qxd2#
- 1...Se6
- 2.Rd7#
- 1...f5
- 2.Re5#
- 1...gxf3!
- threat
- 1.Sxg4?
- threat
- 2.Se3#
- 2.Be4#
- 2.Qf3#
- 1...Sa8+
- 2.bxa8Q#
- 2.bxa8B#
- 1...Qxg3
- 2.Sxf6#
- 2.Be4#
- 1...c3
- 2.Se3#
- 2.Qb3#
- 1...Qg5
- 2.Be4#
- 2.Qf3#
- 2.Qh1#
- 1...Qh1
- 2.Se3#
- 2.Sxf6#
- 2.Qxh1#
- 1...Sc3
- 2.Se3#
- 2.Qxd2#
- 1...Se6
- 2.Rd7#
- 2.Qf3#
- 1...f5
- 2.Se3#
- 2.Re5#
- 2.Qf3#
- 1...Qxg4!
- threat
- 1.Sec6?
- threat
- 2.Sb4#
- 2.Be4#
- 1...c3
- 2.Qb3#
- 1...Qh1
- 2.Sb4#
- 2.Qxh1#
- 1...Sc3
- 2.Sb4#
- 2.Qxd2#
- 1...Sa6
- 2.Be4#
- 2.Bg8#
- 1...Se6
- 2.Rd7#
- 1...f5
- 2.Sb4#
- 2.Re5#
- 1...Sa8+!
- threat
- 1.Sed7?
- threat
- 2.Be4#
- 1...Sa8+
- 2.bxa8Q#
- 2.bxa8B#
- 1...c3
- 2.Qb3#
- 1...Qh1
- 2.Sxf6#
- 2.Qxh1#
- 1...Sc3
- 2.Qxd2#
- 1...f5
- 2.Re5#
- 1...Se6!
- threat
- 1.Bg8+?
- 1...Ke4
- 2.Qc2#
- 2.Qxb1#
- 1...Se6!
- 1...Ke4
- 1.Qc2?
- threat
- 2.Be4#
- 2.Qe4#
- 2.Qxc4#
- 1...Sa8+
- 2.bxa8Q#
- 2.bxa8B#
- 1...fxe5
- 2.Be4#
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Qh1
- 2.Qxc4#
- 1...Bc3
- 2.Be4#
- 2.Qe4#
- 2.Qg2#
- 1...Sa3
- 2.Be4#
- 2.Qe4#
- 2.Qxd2#
- 1...Sc3
- 2.Qxd2#
- 1...c3
- 2.Be4#
- 2.Qb3#
- 2.Qd3#
- 2.Qe4#
- 2.Qa2#
- 1...f5
- 2.Qxc4#
- 1...Ba5+!
- threat
- 1.Qe2?
- threat
- 2.Be4#
- 2.Qxc4#
- 2.Qg2#
- 2.Qe4#
- 1...Sa8+
- 2.bxa8Q#
- 2.bxa8B#
- 1...Qxg3
- 2.Be4#
- 2.Qxc4#
- 2.Qe4#
- 1...fxe5
- 2.Be4#
- 2.Rxe5#
- 2.Qe4#
- 2.Qxe5#
- 1...Se6
- 2.Rd7#
- 2.Qe4#
- 1...Qh1
- 2.Qxc4#
- 1...Qh2
- 2.Be4#
- 2.Qxc4#
- 2.Qe4#
- 1...Qh3
- 2.Be4#
- 2.Qxc4#
- 2.Qe4#
- 1...Be3
- 2.Qxc4#
- 2.Qg2#
- 1...Sa3
- 2.Be4#
- 2.Qxd2#
- 2.Qg2#
- 2.Qe4#
- 1...Sc3
- 2.Qxc4#
- 2.Qxd2#
- 1...c3
- 2.Be4#
- 2.Qd3#
- 2.Qc4#
- 2.Qg2#
- 2.Qe4#
- 1...f5
- 2.Qxc4#
- 2.Qg2#
- 1...Ba5+!
- threat
- 1.Sd3?
- Keys
- 1.Sf7!
- threat
- 2.Be4#
- 1...Sa8+
- 2.bxa8Q#
- 2.bxa8B#
- 1...c3
- 2.Qb3#
- 1...Qh1
- 2.Qxh1#
- 1...Sc3
- 2.Qxd2#
- 1...Se6
- 2.Rd7#
- 1...f5
- 2.Re5#
- threat
- 1.Sf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(e);N_GUARD::QAB(A)
- Q(e);N_GUARD::QAB(A),XQ(e)
- S(a);N_GUARD::QAR(A),XB(b)
- S(i);CHECK,OGATE::PXS(i)=Q
- P(c);OGATEB::QAB(A)
- Tries
- Try
- S(D);N_PINB(b)
- Threat
- DUALS(3)
- Vars
- S(i);CHECK,OGATE::PXS(i)=Q
- P(c);OGATEB,XS(D)::QAB(A)
- P(c);OGATEB::QAB(A)
- S(i);SBLOCK::R(G)
- Refutation
- B(b);CHECK
- Try
- S(D);
- Threat
- B(H)
- Vars
- S(i);CHECK,OGATE::PXS(i)=Q
- P(c);OGATEB::QAB(A)
- S(a);N_GUARD::QAR(A),XB(b)
- S(i);SBLOCK::R(G)
- P(g);N_GUARD::R1(G)
- Refutation
- P(d);XS(D)
- Try
- S(D);XP(d)
- Threat
- DUALS(3)
- Vars
- S(i);CHECK,OGATE::PXS(i)=Q
- Refutation
- Q(e);XS(D)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- P(c);OGATEB::QAB(A)
- S(i);SBLOCK::R(G)
- Refutation
- S(i);CHECK
- Try
- S(D);
- Threat
- B(H)
- Vars
- S(i);CHECK,OGATE::PXS(i)=Q
- P(c);OGATEB::QAB(A)
- S(a);N_GUARD::QAR(A),XB(b)
- P(g);N_GUARD::R1(G)
- Refutation
- S(i);
- Try
- B(H);CHECK
- Refutation
- S(i);P_SPINS(i)
- Try
- Q(A);N_PINB(b)
- Threat
- DUALS(3)
- Vars
- S(i);CHECK,OGATE::PXS(i)=Q
- S(i);::QAB1(A)
- Q(e);::QAB1(A),XP(c)
- S(a);N_GUARD::QAR(A),XB(b)
- P(g);::QAB1(A),XP(c)
- Refutation
- B(b);CHECK
- Try
- Q(A);N_PINB(b)
- Threat
- DUALS(4)
- Vars
- S(i);CHECK,OGATE::PXS(i)=Q
- Q(e);::QAB1(A),XP(c)
- Refutation
- B(b);CHECK
- Try
- Actual
- S(D);
- Threat
- B(H)
- Vars
- S(i);CHECK,OGATE::PXS(i)=Q
- P(c);OGATEB::QAB(A)
- Q(e);N_GUARD::QAB(A),XQ(e)
- S(a);N_GUARD::QAR(A),XB(b)
- S(i);SBLOCK::R(G)
- P(g);N_GUARD::R1(G)
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