MESON Chess Problem Database
Problem Display
PID: 72121 (7b/8/p1K1Q3/p4R2/k5r1/Bp1p4/2b5/RNN5 w - - 0 1)
Smedley, Don A
Chess, 1952
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Rg1
- 2.Qc4#
- 1...Rg2
- 2.Qc4#
- 1...Rg3
- 2.Qc4#
- 1...Rb4
- 2.Bb2#
- 1...Rc4+
- 2.Qxc4#
- 1...Rd4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Rg5
- 2.Qc4#
- 1...Rg7
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Rf4#
- 2.Qc4#
- 2.Qe4#
- 1...Rg8
- 2.Qc4#
- 1...Bxb1
- 2.Qxb3#
- 1...Bc3
- 2.Sxc3#
- 1...Bd4
- 2.Qc4#
- 1...Rg1
- Tries
- 1.Kc5?
- threat
- 2.Bb2#
- 2.Qd7#
- 2.Qc6#
- 2.Qe8#
- 1...Rc4+
- 2.Qxc4#
- 1...Bxb1
- 2.Qxb3#
- 2.Qd7#
- 2.Qc6#
- 2.Qe8#
- 1...Bxa1
- 2.Qd7#
- 2.Qc6#
- 2.Qe8#
- 1...Rb4
- 2.Bb2#
- 1...Rd4
- 2.Sc3#
- 2.Bb2#
- 2.Bb4#
- 2.Qc6#
- 1...Re4
- 2.Bb2#
- 2.Qd7#
- 2.Qc6#
- 1...Rg6
- 2.Bb2#
- 2.Qc4#
- 1...Rg7
- 2.Sc3#
- 2.Bb2#
- 2.Bb4#
- 2.Rf4#
- 2.Qc4#
- 2.Qe4#
- 2.Qc6#
- 1...Rg8
- 2.Bb2#
- 2.Qc4#
- 2.Qd7#
- 2.Qc6#
- 1...Bb2
- 2.Bxb2#
- 2.Qd7#
- 2.Qc6#
- 2.Qe8#
- 1...b2
- 2.Bxb2#
- 2.Qd7#
- 2.Qc6#
- 2.Qe8#
- 1...Bd4+!
- threat
- 1.Kb7?
- threat
- 2.Qd7#
- 2.Qc6#
- 2.Qe8#
- 1...Rg7+
- 2.Be7#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Sc3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc6#
- 1...Re4
- 2.Qd7#
- 2.Qc6#
- 1...Rg6
- 2.Qc4#
- 1...Rg8
- 2.Qc4#
- 2.Qd7#
- 2.Qc6#
- 1...Rb4+!
- threat
- 1.Kc7?
- threat
- 2.Qd7#
- 2.Qc6#
- 2.Qe8#
- 1...Rc4+
- 2.Qxc4#
- 1...Rg7+
- 2.Be7#
- 1...Rb4
- 2.Bb2#
- 1...Rd4
- 2.Sc3#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc6#
- 1...Re4
- 2.Qd7#
- 2.Qc6#
- 1...Rg6
- 2.Qc4#
- 1...Rg8
- 2.Qc4#
- 2.Qd7#
- 2.Qc6#
- 1...Be5+!
- threat
- 1.Sxb3?
- threat
- 2.Sc5#
- 2.Rxa5#
- 1...Rc4+
- 2.Qxc4#
- 1...Rg5
- 2.Sc5#
- 2.Qc4#
- 1...Bc3
- 2.Sxc3#
- 2.Sc5#
- 1...Bd4
- 2.Rxa5#
- 2.Qc4#
- 1...Be5
- 2.Sc5#
- 1...Bxb3!
- threat
- 1.Sxd3?
- threat
- 2.Sc5#
- 2.Bb2#
- 1...Rc4+
- 2.Qxc4#
- 1...Bxb1
- 2.Sc5#
- 1...Bxa1
- 2.Sc5#
- 1...Bb2
- 2.Sxb2#
- 2.Sc5#
- 2.Bxb2#
- 1...Bd4
- 2.Bb2#
- 2.Qc4#
- 1...b2
- 2.Sc5#
- 2.Bxb2#
- 1...Bxd3!
- threat
- 1.Rf4+?
- 1...Bd4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 1...Rxf4!
- 1...Bd4
- 1.Re5?
- threat
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qxg4#
- 1...Rc4+
- 2.Bc5#
- 2.Qxc4#
- 1...Bxb1
- 2.Qxb3#
- 2.Qxg4#
- 1...Re4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Rg1
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 1...Rg2
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 1...Rg3
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 1...Rb4
- 2.Sc3#
- 2.Bb2#
- 1...Rd4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Rf4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Rh4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Rg5
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 1...Rg6
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Rg7
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Re4#
- 2.Qc4#
- 1...Rg8
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 1...Bd1
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...b2
- 2.Sc3#
- 2.Qxg4#
- 1...d2
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Bxe5!
- threat
- 1.Rf6?
- threat
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qxg4#
- 1...Rc4+
- 2.Bc5#
- 2.Qxc4#
- 1...Bxb1
- 2.Qxb3#
- 2.Qxg4#
- 1...Re4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qxe4#
- 1...Rg1
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 2.Qe4#
- 1...Rg2
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 2.Qe4#
- 1...Rg3
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 2.Qe4#
- 1...Rb4
- 2.Sc3#
- 2.Bb2#
- 1...Rd4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Rf4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Rh4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Rg5
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 2.Qe4#
- 1...Rg6
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 2.Qe4#
- 1...Rg7
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Rf4#
- 2.Qc4#
- 2.Qe4#
- 1...Rg8
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qc4#
- 2.Qe4#
- 1...Bd1
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...b2
- 2.Sc3#
- 2.Qxg4#
- 1...d2
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Bxf6!
- threat
- 1.Qe4+?
- 1...Bd4
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 1...Rxe4!
- 1...Bd4
- 1.Qe5?
- threat
- 2.Sc3#
- 2.Bc5#
- 2.Bd6#
- 2.Be7#
- 2.Bf8#
- 2.Qxa5#
- 1...Rc4+
- 2.Bc5#
- 1...Rg6+
- 2.Bd6#
- 1...Bxb1
- 2.Qxa5#
- 1...Rb4
- 2.Sc3#
- 2.Bb2#
- 2.Qxa5#
- 1...b2
- 2.Sc3#
- 2.Qxa5#
- 1...Bxe5!
- threat
- 1.Kc5?
- Keys
- 1.Kd7!
- threat
- 2.Qc6#
- 1...Rd4+
- 2.Bd6#
- 1...Rg7+
- 2.Be7#
- 1...Rb4
- 2.Bb2#
- 1...Rc4
- 2.Qxc4#
- 1...Rg6
- 2.Qc4#
- threat
- 1.Kd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 8
- Sets
- R(e);N_GUARD::QAR2(G)
- R(e);SBLOCK::R(A)+B(D)
- R(e);CHECK,N_GUARD::QAR2(G),XR(e)
- B(a);N_GUARD,XS(B)::QAB1(G),XP(b)
- B(h);N_GUARD::S(B),XB(h)
- B(h);S_CUTR(e)::QAR2(G)
- Tries
- Try
- K(F);P-FLIGHT
- Threat
- DUALS(4)
- Vars
- R(e);CHECK,N_GUARD::QAR2(G),XR(e)
- R(e);::R(A)+B(D)
- Refutation
- B(h);CHECK
- Try
- K(F);S_FLIGHT
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,S_CUTB(h)::R(A)+B(D)
- R(e);N_GUARD::QAR2(G),XR(e)
- R(e);N_GUARD::QAR2(G)
- Refutation
- R(e);CHECK
- Try
- K(F);P-FLIGHT
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,N_GUARD::QAR2(G),XR(e)
- R(e);CHECK,S_CUTB(h)::R(A)+B(D)
- R(e);SBLOCK::R(A)+B(D)
- R(e);N_GUARD::QAR2(G)
- Refutation
- B(h);CHECK
- Try
- S(C);XP(b)
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,N_GUARD::QAR2(G),XR(e)
- B(h);::S(C)
- Refutation
- B(a);XS(C)
- Try
- S(C);XP(c)
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,N_GUARD::QAR2(G),XR(e)
- B(a);XS(B)::S(C)
- B(h);XR(A)::S(C)
- Refutation
- B(a);XS(C)
- Try
- R(E);CHECK
- Refutation
- R(e);XR(E)
- Try
- R(E);
- Threat
- DUALS(6)
- Refutation
- B(h);XR(E)
- Try
- R(E);
- Threat
- DUALS(6)
- Refutation
- B(h);XR(E)
- Try
- Q(G);CHECK
- Refutation
- R(e);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(6)
- Vars
- R(e);CHECK::R(A)+B(D)
- B(a);XS(B)::QAR1(G),XP(f)
- Refutation
- B(h);XQ(G)
- Try
- Actual
- K(F);S_FLIGHT
- Threat
- QAB(G)
- Vars
- R(e);CHECK,S_CUTB(h)::R(A)+B(D)
- R(e);SBLOCK::R(A)+B(D)
- R(e);N_GUARD::QAR2(G),XR(e)
- R(e);N_GUARD::QAR2(G)
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).