MESON Chess Problem Database
Problem Display
PID: 11869 (b4R1B/3R4/1qP1r2b/4n3/2p1N2Q/4kp2/3p4/rB1n1K2 w - - 0 1)
Thomson, PC
1st HM., The Problemist, 1972
#2
8 + 11
SOLUTION
- SOUND
- Sets
- 1...Re7
- 2.Qxh6#
- 1...Re8
- 2.Qxh6#
- 1...Bf4
- 2.Qxf4#
- 1...Bg5
- 2.Qxg5#
- 1...Bg7
- 2.Qg5#
- 2.Qf4#
- 1...Bxf8
- 2.Qg5#
- 1...Sb2
- 2.Qf2#
- 1...Sf2
- 2.Qxf2#
- 1...Sc3
- 2.Qf2#
- 1...Re7
- Tries
- 1.Sxd2?
- threat
- 2.Qe1#
- 2.Qe4#
- 1...Qxb1
- 2.Qe1#
- 2.Qd4#
- 1...Qxc6
- 2.Qe1#
- 2.Qd4#
- 1...Bxf8
- 2.Qg5#
- 2.Qe4#
- 1...Bxc6
- 2.Qe1#
- 1...Sxc6
- 2.Sxc4#
- 2.Rxf3#
- 2.Qe1#
- 1...Sxd7
- 2.Sxc4#
- 2.Qe1#
- 1...Qd4
- 2.Qe1#
- 2.Qxd4#
- 1...Sd3
- 2.Sxc4#
- 1...Rf6
- 2.Qe4#
- 1...Bf4
- 2.Qe1#
- 2.Qxf4#
- 1...Sf2
- 2.Qxf2#
- 1...Sc3
- 2.Qf2#
- 1...Sg4
- 2.Sxc4#
- 2.Rxf3#
- 2.Qe1#
- 1...Sg6
- 2.Sxc4#
- 2.Rxf3#
- 2.Qe1#
- 1...Sf7
- 2.Sxc4#
- 1...f2
- 2.Qe4#
- 1...Rd6!
- threat
- 1.Sf2?
- threat
- 2.Sxd1#
- 2.Qe4#
- 1...Qxb1
- 2.Qd4#
- 1...Qxc6
- 2.Sxd1#
- 2.Qd4#
- 1...Rxb1
- 2.Qe4#
- 1...Bxc6
- 2.Sxd1#
- 1...Sxf2
- 2.Qxf2#
- 1...Sxc6
- 2.Sxd1#
- 2.Sg4#
- 1...Sxd7
- 2.Sxd1#
- 2.Sg4#
- 1...Qd4
- 2.Sxd1#
- 2.Qxd4#
- 1...Qb3
- 2.Qd4#
- 2.Qe4#
- 1...Bf4
- 2.Sxd1#
- 2.Qxf4#
- 1...Sb2
- 2.Qe4#
- 1...Sd3
- 2.Sxd1#
- 1...Sg4
- 2.Sxd1#
- 2.Sxg4#
- 1...Sg6
- 2.Sxd1#
- 2.Sg4#
- 1...Sf7
- 2.Sxd1#
- 1...Sc3!
- threat
- 1.Sg3?
- threat
- 2.Sf5#
- 2.Qe4#
- 1...Qxb1
- 2.Qd4#
- 1...Qxc6
- 2.Sf5#
- 2.Qd4#
- 1...Bxc6
- 2.Sf5#
- 1...Sxc6
- 2.Sf5#
- 1...Sxd7
- 2.Sf5#
- 1...Qd4
- 2.Sf5#
- 2.Qxd4#
- 1...Rf6
- 2.Qe4#
- 1...Bf4
- 2.Sf5#
- 2.Qxf4#
- 1...Sf2
- 2.Sf5#
- 1...Sc3
- 2.Sf5#
- 1...Sd3
- 2.Sf5#
- 1...Sg6
- 2.Sf5#
- 1...Sf7
- 2.Sf5#
- 1...f2
- 2.Qe4#
- 1...Sg4!
- threat
- 1.Sc5?
- threat
- 2.Qd4#
- 2.Qe4#
- 1...Qxc5
- 2.Qe4#
- 1...Qxb1
- 2.Qd4#
- 1...Qxc6
- 2.Qd4#
- 1...Bxc6
- 2.Qd4#
- 1...Sxd7
- 2.Bd4#
- 2.Qd4#
- 1...Qb2
- 2.Qe4#
- 1...Rd6
- 2.Qe4#
- 1...Bf4
- 2.Qxf4#
- 1...Sf2
- 2.Qxf2#
- 2.Qd4#
- 1...Sc3
- 2.Qf2#
- 2.Qd4#
- 1...Sd3
- 2.Bd4#
- 2.Qd4#
- 1...Sg4
- 2.Bd4#
- 1...Sg6
- 2.Bd4#
- 2.Qd4#
- 1...Sf7
- 2.Bd4#
- 2.Qd4#
- 1...Sxc6!
- threat
- 1.Sg5?
- threat
- 2.Qe4#
- 2.Qf4#
- 1...Qxb1
- 2.Qd4#
- 2.Qf4#
- 1...Qxc6
- 2.Qd4#
- 2.Qf4#
- 1...Bxg5
- 2.Qxg5#
- 2.Qe4#
- 1...Bxf8
- 2.Qe4#
- 1...Bxc6
- 2.Qf4#
- 1...Sxc6
- 2.Rxf3#
- 2.Qf4#
- 1...Sxd7
- 2.Rxf3#
- 2.Qf4#
- 1...Qd4
- 2.Qxd4#
- 1...Rf6
- 2.Qe4#
- 1...Sf2
- 2.Qxf2#
- 2.Qf4#
- 1...Sc3
- 2.Qf2#
- 2.Qf4#
- 1...Sd3
- 2.Rxf3#
- 1...Sg4
- 2.Rxf3#
- 1...Sg6
- 2.Rxf3#
- 1...Sf7!
- threat
- 1.Sd6?
- threat
- 2.Sf5#
- 2.Qe4#
- 1...Qxc6
- 2.Sf5#
- 1...Rxd6
- 2.Qe4#
- 1...Bxc6
- 2.Sf5#
- 1...Sxc6
- 2.Sxc4#
- 2.Sf5#
- 1...Sxd7
- 2.Sxc4#
- 2.Sf5#
- 1...Bf4
- 2.Sf5#
- 2.Qxf4#
- 1...Qd4
- 2.Sf5#
- 1...Rf6
- 2.Qe4#
- 1...Sf2
- 2.Sf5#
- 2.Qxf2#
- 1...Sc3
- 2.Sf5#
- 2.Qf2#
- 1...Sd3
- 2.Sxc4#
- 2.Sf5#
- 1...Sg4
- 2.Sxc4#
- 1...Sg6
- 2.Sxc4#
- 2.Sf5#
- 1...Sf7
- 2.Sxc4#
- 2.Sf5#
- 1...f2
- 2.Qe4#
- 1...Qxb1!
- threat
- 1.Sf6?
- threat
- 2.Sd5#
- 2.Qe4#
- 2.Qxh6#
- 1...Qxb1
- 2.Qd4#
- 2.Qxh6#
- 1...Qxc6
- 2.Qd4#
- 2.Qxh6#
- 1...Rxb1
- 2.Qe4#
- 2.Qxh6#
- 1...Rxf6
- 2.Qe4#
- 1...Bxf8
- 2.Sd5#
- 2.Qg5#
- 2.Qe4#
- 1...Bxc6
- 2.Qxh6#
- 1...Sxc6
- 2.Sg4#
- 2.Sd5#
- 2.Qxh6#
- 1...Sxd7
- 2.Sg4#
- 2.Sd5#
- 1...Sg4
- 2.Sxg4#
- 2.Sd5#
- 1...f2
- 2.Sd5#
- 2.Qe4#
- 1...Qd4
- 2.Qxd4#
- 1...Qa5
- 2.Qd4#
- 2.Qe4#
- 2.Qxh6#
- 1...Qc5
- 2.Qe4#
- 2.Qxh6#
- 1...Qb5
- 2.Qd4#
- 2.Qe4#
- 2.Qxh6#
- 1...Ra5
- 2.Qe4#
- 2.Qxh6#
- 1...Rd6
- 2.Qe4#
- 1...Bg5
- 2.Sd5#
- 2.Qxg5#
- 2.Qe4#
- 1...Bg7
- 2.Sd5#
- 2.Qg5#
- 2.Qe4#
- 1...Sf2
- 2.Sd5#
- 2.Qxh6#
- 1...Sc3
- 2.Qxh6#
- 1...Sd3
- 2.Sd5#
- 1...Sg6
- 2.Sg4#
- 2.Sd5#
- 1...Sf7
- 2.Sd5#
- 1...Bf4!
- threat
- 1.Rxf3+?
- 1...Kxf3
- 2.Qg3#
- 1...Sxf3!
- 1...Kxf3
- 1.Sxd2?
- Keys
- 1.Sc3!
- threat
- 2.Sxd1#
- 2.Sd5#
- 2.Qe4#
- 1...Qxb1
- 2.Qd4#
- 1...Qxc6
- 2.Sxd1#
- 2.Qd4#
- 1...Rxb1
- 2.Qe4#
- 1...Bxc6
- 2.Sxd1#
- 1...Sxc3
- 2.Qf2#
- 1...Sxc6
- 2.Sxd1#
- 2.Sd5#
- 1...Sxd7
- 2.Sxd1#
- 2.Sd5#
- 1...Qd4
- 2.Sxd1#
- 2.Qxd4#
- 1...Qa5
- 2.Sxd1#
- 2.Qd4#
- 2.Qe4#
- 1...Qc5
- 2.Sxd1#
- 2.Qe4#
- 1...Qb3
- 2.Sd5#
- 2.Qd4#
- 2.Qe4#
- 1...Qb5
- 2.Sxd1#
- 2.Qd4#
- 2.Qe4#
- 1...Ra5
- 2.Sxd1#
- 2.Qe4#
- 1...Rd6
- 2.Sxd1#
- 2.Qe4#
- 1...Bf4
- 2.Sxd1#
- 2.Qxf4#
- 1...Sb2
- 2.Sd5#
- 2.Qf2#
- 2.Qe4#
- 1...Sf2
- 2.Sd5#
- 2.Qxf2#
- 1...Sd3
- 2.Sxd1#
- 2.Sd5#
- 1...Sg4
- 2.Sxd1#
- 2.Sd5#
- 1...Sg6
- 2.Sxd1#
- 2.Sd5#
- 1...Sf7
- 2.Sxd1#
- 2.Sd5#
- threat
- 1.Sc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- R(i);N_GUARD::QAB(D),XB(j)
- B(j);N_GUARD::QAB1(D),XB(j)
- B(j);N_GUARD::QAB(D),XB(j)
- B(j);N_GUARD,XR(G)::QAB(D)
- S(b);N_GUARD,P_PINB(A)::QAB1(D)
- S(b);N_GUARD,P_PINB(A)::QAB1(D),XS(b)
- Tries
- Try
- S(C);XP(c)
- Threat
- DUALS(2)
- Vars
- B(k);XP(E)::QAR2(D)
- S(g);N_GUARD::S(C),XP(f)
- R(i);::QAR1(D)
- S(b);N_GUARD,P_PINB(A)::QAB1(D),XS(b)
- S(b);N_GUARD,P_PINB(A)::QAB1(D)
- P(e);::QAR1(D)
- Refutation
- R(i);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(h);N_GUARD,XB(A)::QAB1(D)
- R(a);XB(A)::QAR1(D)
- B(k);XP(E)::S(C),XS(b)
- S(b);OGATE,P_PINB(A),XS(C)::QAB1(D),XS(b)
- S(b);P_PINB(A)::QAR1(D)
- S(g);::S(C),XS(b)
- Refutation
- S(b);P_PINB(A)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(h);N_GUARD,XB(A)::QAB1(D)
- B(k);XP(E)::S(C)
- S(g);XP(E)::S(C)
- S(g);XR(F)::S(C)
- R(i);::QAR1(D)
- S(b);P_PINB(A)::S(C)
- S(g);::S(C)
- P(e);::QAR1(D)
- Refutation
- S(g);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(h);XS(C)::QAR1(D)
- Q(h);XB(A)::QAB1(D)
- Q(h);XP(E)::QAB1(D)
- B(k);XP(E)::QAB1(D)
- Q(h);::QAR1(D)
- R(i);::QAR1(D)
- B(j);N_GUARD::QAB1(D),XB(j)
- S(g);OGATE::B(H)
- Refutation
- S(g);XP(E)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- B(j);XR(G)::QAR1(D)
- B(k);XP(E)::QAB1(D)
- Q(h);N_GUARD::QAB1(D),XQ(h)
- R(i);::QAR1(D)
- S(g);N_GUARD::R1(G),XP(e)
- Refutation
- S(g);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(h);XP(E)::S(C)
- R(i);XS(C)::QAR1(D)
- B(k);XP(E)::S(C)
- Q(h);::S(C)
- R(i);::QAR1(D)
- S(g);N_GUARD::S(C),XP(f)
- P(e);::QAR1(D)
- Refutation
- Q(h);XB(A)
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- R(i);XS(C)::QAR1(D)
- B(k);XP(E)::QAB(D),XB(j)
- Q(h);N_GUARD::QAB1(D),XQ(h)
- R(i);::QAR1(D)
- S(b);P_PINB(A)::QAB(D),XB(j)
- S(g);::S(C)
- Refutation
- B(j);
- Try
- R(G);CHECK,XP(e)
- Vars
- K(d);P-FLIGHT,XR(G)::QAR1(D)
- Refutation
- S(g);XR(G)
- Try
- Actual
- S(C);
- Threat
- DUALS(3)
- Vars
- Q(h);N_GUARD,XB(A)::QAB1(D)
- R(a);XB(A)::QAR1(D)
- B(k);XP(E)::S(C),XS(b)
- S(b);N_GUARD,P_PINB(A),XS(C)::QAB1(D)
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).