MESON Chess Problem Database
Problem Display
PID: 64467 (7Q/N2B4/1p3P2/1Rqpk1Pp/4P2K/B5P1/2PN1P2/3R4 w - - 0 1)
Markwick, Frederick W
Good Companions (May), 1920
#2
14 + 5
| 3132 | The Good Companion Two-Mover | 1922 |
| 3391 | Het Half Pin Thema | 1924 |
SOLUTION
- SOUND
- Sets
- 1...Kd4
- 2.f7#
- 1...Qxf2
- 2.Sc6#
- 2.Rxd5#
- 1...Qxa3
- 2.Rxd5#
- 1...Qe3
- 2.Sc6#
- 2.Rxd5#
- 2.f7#
- 1...Qb4
- 2.Rxd5#
- 1...Qd4
- 2.Sc6#
- 2.Qb8#
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...Qd6
- 2.Bb2#
- 1...Qe7
- 2.Sc6#
- 2.Rxd5#
- 2.fxe7#
- 1...Qf8
- 2.Sc6#
- 2.Rxd5#
- 1...Qxc2
- 2.Rxd5#
- 2.f7#
- 1...Qc3
- 2.Rxd5#
- 2.f7#
- 1...Qc4
- 2.f7#
- 1...Qxb5
- 2.f7#
- 1...Qc6
- 2.Sxc6#
- 1...Qc7
- 2.Rxd5#
- 2.f7#
- 1...Qc8
- 2.Rxd5#
- 1...dxe4
- 2.Sc4#
- 1...d4
- 2.Qb8#
- 1...Kd4
- Tries
- 1.Kxh5?
- 1...Kd4
- 2.f7#
- 1...Qxf2
- 2.Sc6#
- 2.Rxd5#
- 1...Qxa3
- 2.Rxd5#
- 1...Qxc2
- 2.Rxd5#
- 2.f7#
- 1...Qxb5
- 2.f7#
- 1...dxe4
- 2.Sc4#
- 1...Qe3
- 2.Sc6#
- 2.Rxd5#
- 2.f7#
- 1...Qb4
- 2.Rxd5#
- 1...Qd4
- 2.Sc6#
- 2.Qb8#
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...Qd6
- 2.Bb2#
- 1...Qe7
- 2.Sc6#
- 2.Rxd5#
- 2.fxe7#
- 1...Qf8
- 2.Sc6#
- 2.Rxd5#
- 1...Qc3
- 2.Rxd5#
- 2.f7#
- 1...Qc4
- 2.f7#
- 1...Qc6
- 2.Sxc6#
- 1...Qc7
- 2.Rxd5#
- 2.f7#
- 1...Qc8
- 2.Rxd5#
- 1...d4
- 2.Qb8#
- 1...Kd6!
- 1...Kd4
- 1.Sc4+?
- 1...Qxc4
- 2.Qe8#
- 1...dxc4
- 2.Qe8#
- 1...Kxe4!
- 1...Qxc4
- 1.Sc8?
- threat
- 2.f7#
- 1...Kd4
- 2.f7#
- 1...Qxf2
- 2.Rxd5#
- 1...Qxc8
- 2.Rxd5#
- 1...dxe4
- 2.Sc4#
- 1...Qd6
- 2.Bb2#
- 1...Qe7
- 2.Bb2#
- 2.Rxd5#
- 2.fxe7#
- 1...Qf8
- 2.Bb2#
- 2.Rxd5#
- 1...Qc6!
- threat
- 1.Bb2+?
- 1...Qd4
- 2.Rxd5#
- 2.Qb8#
- 1...Qc3
- 2.Rxd5#
- 1...d4
- 2.Qb8#
- 1...Kd6!
- 1...Qd4
- 1.Bb4?
- 1...Kd4
- 2.f7#
- 1...Qxf2
- 2.Sc6#
- 2.Rxd5#
- 1...Qxb4
- 2.Rxd5#
- 1...Qxc2
- 2.Rxd5#
- 2.f7#
- 1...Qxb5
- 2.f7#
- 1...dxe4
- 2.Sc4#
- 1...Qe3
- 2.Sc6#
- 2.Rxd5#
- 2.f7#
- 1...Qd4
- 2.Sc6#
- 2.Qb8#
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...Qd6
- 2.Bc3#
- 1...Qe7
- 2.Sc6#
- 2.Rxd5#
- 2.fxe7#
- 1...Qf8
- 2.Sc6#
- 2.Rxd5#
- 1...Qc3
- 2.Rxd5#
- 2.f7#
- 1...Qc4
- 2.f7#
- 1...Qc6
- 2.Sxc6#
- 1...Qc7
- 2.Rxd5#
- 2.f7#
- 1...Qc8
- 2.Rxd5#
- 1...d4
- 2.Qb8#
- 1...Kd6!
- 1...Kd4
- 1.Bxc5?
- threat
- 2.Sc6#
- 2.Qb8#
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...dxe4
- 2.Sc4#
- 1...bxc5!
- threat
- 1.Bg4?
- 1...Kd4
- 2.f7#
- 1...Kd6
- 2.Qb8#
- 1...Qxf2
- 2.Sc6#
- 2.Rxd5#
- 1...Qxa3
- 2.Rxd5#
- 1...Qxc2
- 2.Rxd5#
- 2.f7#
- 1...Qxb5
- 2.f7#
- 1...dxe4
- 2.Sc4#
- 1...Qe3
- 2.Sc6#
- 2.Rxd5#
- 2.f7#
- 1...Qb4
- 2.Rxd5#
- 1...Qd4
- 2.Sc6#
- 2.Qb8#
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...Qd6
- 2.Bb2#
- 1...Qe7
- 2.Sc6#
- 2.Rxd5#
- 2.fxe7#
- 1...Qf8
- 2.Sc6#
- 2.Rxd5#
- 1...Qc3
- 2.Rxd5#
- 2.f7#
- 1...Qc4
- 2.f7#
- 1...Qc6
- 2.Sxc6#
- 1...Qc7
- 2.Rxd5#
- 2.f7#
- 1...Qc8
- 2.Rxd5#
- 1...d4
- 2.Qb8#
- 1...hxg4!
- 1...Kd4
- 1.Bf5?
- 1...Kd4
- 2.f7#
- 1...Kd6
- 2.Qb8#
- 1...Qxf2
- 2.Sc4#
- 2.Sc6#
- 2.Rxd5#
- 2.f7#
- 1...Qxa3
- 2.Sc4#
- 2.Rxd5#
- 1...Qxc2
- 2.Sf3#
- 2.Rxd5#
- 2.f7#
- 1...Qxb5
- 2.Sf3#
- 2.f7#
- 1...Qe3
- 2.Sc4#
- 2.Sc6#
- 2.Rxd5#
- 2.f7#
- 1...Qb4
- 2.Rxd5#
- 1...Qd4
- 2.Sf3#
- 2.Sc6#
- 2.Qb8#
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...Qd6
- 2.Sf3#
- 2.Sc4#
- 2.Bb2#
- 1...Qe7
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Rxd5#
- 2.fxe7#
- 1...Qf8
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Rxd5#
- 1...Qc3
- 2.Rxd5#
- 2.f7#
- 1...Qc4
- 2.Sf3#
- 2.Sxc4#
- 2.f7#
- 1...Qc6
- 2.Sf3#
- 2.Sxc6#
- 1...Qc7
- 2.Sf3#
- 2.Rxd5#
- 2.f7#
- 1...Qc8
- 2.Sf3#
- 2.Rxd5#
- 1...d4
- 2.Sc4#
- 2.Qb8#
- 1...dxe4!
- 1...Kd4
- 1.Qg7?
- 1...Kd4
- 2.f7#
- 1...Qxf2
- 2.Sc6#
- 2.Rxd5#
- 1...Qxa3
- 2.Rxd5#
- 1...Qxc2
- 2.Rxd5#
- 2.f7#
- 1...Qxb5
- 2.f7#
- 1...dxe4
- 2.Sc4#
- 1...Qe3
- 2.Sc6#
- 2.Rxd5#
- 2.f7#
- 1...Qb4
- 2.Rxd5#
- 1...Qd4
- 2.Sc6#
- 2.Qe7#
- 2.f4#
- 2.f7#
- 1...Qd6
- 2.Bb2#
- 1...Qe7
- 2.Sc6#
- 2.Rxd5#
- 2.fxe7#
- 1...Qf8
- 2.Sc6#
- 2.Rxd5#
- 1...Qc3
- 2.Rxd5#
- 2.f7#
- 1...Qc4
- 2.f7#
- 1...Qc6
- 2.Sxc6#
- 1...Qc7
- 2.Rxd5#
- 2.f7#
- 1...Qc8
- 2.Rxd5#
- 2.f7#
- 1...d4
- 2.Qe7#
- 1...Kd6!
- 1...Kd4
- 1.Qb8+?
- 1...Qd6
- 2.Sc6#
- 2.Bb2#
- 2.Rxd5#
- 1...Qc7
- 2.Sc6#
- 2.Rxd5#
- 1...Kd4!
- 1...Qd6
- 1.c3?
- 1...Qxf2
- 2.Sc6#
- 2.Rxd5#
- 2.Qb8#
- 2.Qe8#
- 1...Qxa3
- 2.Rxd5#
- 1...Qxc3
- 2.Rxd5#
- 2.f7#
- 1...Qxb5
- 2.Qb8#
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...dxe4
- 2.Sc4#
- 1...Qe3
- 2.Sc6#
- 2.Rxd5#
- 2.Qb8#
- 2.Qe8#
- 2.f7#
- 1...Qb4
- 2.Rxd5#
- 1...Qd4
- 2.Sc6#
- 2.Qb8#
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...Qd6
- 2.f4#
- 1...Qe7
- 2.Sc6#
- 2.Rxd5#
- 2.f4#
- 2.fxe7#
- 1...Qf8
- 2.Sc6#
- 2.Rxd5#
- 2.f4#
- 1...Qc4
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...Qc6
- 2.Sxc6#
- 2.f4#
- 1...Qc7
- 2.Rxd5#
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...Qc8
- 2.Rxd5#
- 2.f4#
- 1...d4
- 2.Qb8#
- 1...Kd6!
- 1...Qxf2
- 1.Kxh5?
- Keys
- 1.Bh3!
- 1...Kd4
- 2.f7#
- 1...Kd6
- 2.Qb8#
- 1...Qxf2
- 2.Sc6#
- 2.Rxd5#
- 1...Qxa3
- 2.Rxd5#
- 1...Qxc2
- 2.Rxd5#
- 2.f7#
- 1...Qxb5
- 2.f7#
- 1...dxe4
- 2.Sc4#
- 1...Qe3
- 2.Sc6#
- 2.Rxd5#
- 2.f7#
- 1...Qb4
- 2.Rxd5#
- 1...Qd4
- 2.Sc6#
- 2.Qb8#
- 2.Qe8#
- 2.f4#
- 2.f7#
- 1...Qd6
- 2.Bb2#
- 1...Qe7
- 2.Sc6#
- 2.Rxd5#
- 2.fxe7#
- 1...Qf8
- 2.Sc6#
- 2.Rxd5#
- 1...Qc3
- 2.Rxd5#
- 2.f7#
- 1...Qc4
- 2.f7#
- 1...Qc6
- 2.Sxc6#
- 1...Qc7
- 2.Rxd5#
- 2.f7#
- 1...Qc8
- 2.Rxd5#
- 1...d4
- 2.Qb8#
- 1...Kd4
- 1.Bh3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(c);S_FLIGHT::QAB(N)+P(K)
- Q(a);OGATE,P_SPINP(b),XB(E)::R1(I),XP(b)
- Q(a);OGATE,P_PINP(G),P_SPINP(b)::R1(I),XP(b)
- Q(a);N_GUARD,P_SPINP(b),SBLOCK::B(E)
- Q(a);P_PINP(G),P_SPINP(b)::QAB(N)+P(K)
- Q(a);XR(I)::QAB(N)+P(K)
- Q(a);N_GUARD,P_SPINP(b)::S(L),XQ(a)
- Q(a);OGATE,P_SPINP(b)::R1(I),XP(b)
- P(b);N_GUARD,P_SPINQ(a),SBLOCK,XP(G)::S(C)
- P(b);P_SPINQ(a),SBLOCK::QAB(N)
- Tries
- Try
- K(H);P-FLIGHT,XP(d)
- Vars
- K(c);S_FLIGHT::QAB(N)+P(K)
- Q(a);OGATE,P_SPINP(b),XB(E)::R1(I),XP(b)
- Q(a);XR(I)::QAB(N)+P(K)
- P(b);N_GUARD,P_SPINQ(a),SBLOCK,XP(G)::S(C)
- Q(a);OGATE,P_SPINP(b)::R1(I),XP(b)
- Q(a);N_GUARD,P_SPINP(b),SBLOCK::B(E)
- Q(a);P_SPINP(b)::QAB(N)+P(K)
- Q(a);N_GUARD,P_SPINP(b)::S(L),XQ(a)
- P(b);P_SPINQ(a),SBLOCK::QAB(N)
- Refutation
- K(c);P_SPINQ(a),S_FLIGHT
- Try
- S(C);CHECK
- Vars
- Q(a);P_PINP(G),P_SPINP(b),XS(C)::QAR(N)
- P(b);P_SPINQ(a),XS(C)::QAR(N)
- Refutation
- K(c);P-FLIGHT,XP(G)
- Try
- S(L);
- Threat
- QAB(N)+P(K)
- Vars
- K(c);S_FLIGHT::QAB(N)+P(K)
- Q(a);OGATE,P_PINP(F),P_SPINP(b),XP(D)::R1(I),XP(b)
- Q(a);OGATE,P_SPINP(b),XS(L)::R1(I),XP(b)
- P(b);N_GUARD,P_SPINQ(a),SBLOCK,XP(G)::S(C)
- Q(a);N_GUARD,P_SPINP(b)::B(E)
- Refutation
- Q(a);P_SPINP(b)
- Try
- B(E);CHECK
- Vars
- Q(a);OGATE,P_SPINP(b),P_SPINQ(a)::R1(I),XP(b)
- P(b);P_SPINP(b),P_SPINQ(a)::QAB(N)
- Refutation
- K(c);S_FLIGHT
- Try
- B(E);
- Vars
- K(c);S_FLIGHT::QAB(N)+P(K)
- Q(a);OGATE,P_PINP(G),P_SPINP(b),XB(E)::R1(I),XP(b)
- Q(a);XR(I)::QAB(N)+P(K)
- P(b);N_GUARD,P_SPINQ(a),SBLOCK,XP(G)::S(C)
- Q(a);N_GUARD,P_SPINP(b),SBLOCK::B(E)
- Q(a);P_PINP(G),P_SPINP(b)::QAB(N)+P(K)
- Q(a);N_GUARD,P_SPINP(b)::S(L),XQ(a)
- Q(a);OGATE,P_SPINP(b)::R1(I),XP(b)
- P(b);P_SPINQ(a),SBLOCK::QAB(N)
- Refutation
- K(c);P_SPINQ(a),S_FLIGHT
- Try
- B(E);XQ(a)
- Threat
- DUALS(5)
- Vars
- P(b);N_GUARD,SBLOCK,XP(G)::S(C)
- Refutation
- P(e);XB(E)
- Try
- B(M);
- Vars
- K(c);S_FLIGHT::QAB(N)+P(K)
- K(c);P_SPINQ(a),S_FLIGHT::QAB(N)
- Q(a);OGATE,P_SPINP(b),XB(E)::R1(I),XP(b)
- Q(a);XR(I)::QAB(N)+P(K)
- P(b);N_GUARD,P_SPINQ(a),SBLOCK,XP(G)::S(C)
- Q(a);OGATE,P_SPINP(b)::R1(I),XP(b)
- Q(a);N_GUARD,P_SPINP(b),SBLOCK::B(E)
- Q(a);P_SPINP(b)::QAB(N)+P(K)
- Q(a);N_GUARD,P_SPINP(b)::S(L),XQ(a)
- P(b);P_SPINQ(a),SBLOCK::QAB(N)
- Refutation
- P(d);XB(M)
- Try
- B(M);
- Vars
- K(c);S_FLIGHT::QAB(N)+P(K)
- K(c);P_SPINQ(a),S_FLIGHT::QAB(N)
- Q(a);OGATE,P_PINP(G),P_SPINP(b)::R1(I),XP(b)
- Refutation
- P(b);P_SPINQ(a),XP(G)
- Try
- Q(N);
- Vars
- K(c);S_FLIGHT::QAB(N)+P(K)
- Q(a);OGATE,P_SPINP(b),XB(E)::R1(I),XP(b)
- Q(a);XR(I)::QAB(N)+P(K)
- P(b);N_GUARD,P_SPINQ(a),SBLOCK,XP(G)::S(C)
- Q(a);OGATE,P_PINP(G),P_SPINP(b)::R1(I),XP(b)
- Q(a);N_GUARD,P_SPINP(b),SBLOCK::B(E)
- Q(a);P_PINP(G),P_SPINP(b)::QAB(N)+P(K)
- Q(a);N_GUARD,P_SPINP(b)::S(L),XQ(a)
- P(b);P_SPINQ(a),SBLOCK::QAR2(N)
- Refutation
- K(c);P_SPINQ(a),S_FLIGHT
- Try
- Q(N);CHECK
- Refutation
- K(c);S_FLIGHT
- Try
- P(B);
- Vars
- Q(a);OGATE,P_SPINP(b),XB(E)::R1(I),XP(b)
- P(b);N_GUARD,P_SPINQ(a),SBLOCK,XP(G)::S(C)
- Q(a);OGATE,P_PINP(G),P_SPINP(b)::R1(I),XP(b)
- Q(a);P_SPINP(b)::P(D)
- P(b);P_SPINQ(a)::QAB(N)
- Refutation
- K(c);P_SPINQ(a),S_FLIGHT
- Try
- Actual
- B(M);
- Vars
- K(c);S_FLIGHT::QAB(N)+P(K)
- K(c);P_SPINQ(a),S_FLIGHT::QAB(N)
- Q(a);OGATE,P_SPINP(b),XB(E)::R1(I),XP(b)
- Q(a);XR(I)::QAB(N)+P(K)
- P(b);N_GUARD,P_SPINQ(a),SBLOCK,XP(G)::S(C)
- Q(a);OGATE,P_PINP(G),P_SPINP(b)::R1(I),XP(b)
- Q(a);N_GUARD,P_SPINP(b),SBLOCK::B(E)
- Q(a);P_PINP(G),P_SPINP(b)::QAB(N)+P(K)
- Q(a);N_GUARD,P_SPINP(b)::S(L),XQ(a)
- Q(a);OGATE,P_SPINP(b)::R1(I),XP(b)
- P(b);P_SPINQ(a),SBLOCK::QAB(N)
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).