MESON Chess Problem Database
Problem Display
PID: 51173 (nb6/Nr6/2R5/7Q/3k3N/q4Pp1/nP1PP3/1B2K3 w - - 0 1)
Allison, Christopher John
Manchester Guardian, 1952
#2
10 + 7
| 15148 | Sadier Collection | 2015 |
SOLUTION
- SOUND
- Sets
- 1...Qxb2
- 2.Qc5#
- 2.e3#
- 1...Qb4
- 2.e3#
- 1...Qc5
- 2.Qxc5#
- 1...Qd6
- 2.e3#
- 1...Qf8
- 2.e3#
- 1...Qb3
- 2.Qc5#
- 1...Qd3
- 2.Qc5#
- 1...Qe3
- 2.Qc5#
- 1...Qxf3
- 2.Sxf3#
- 2.Qc5#
- 1...Qa4
- 2.Qc5#
- 2.e3#
- 1...Qa5
- 2.e3#
- 1...Qa6
- 2.Qc5#
- 2.e3#
- 1...Qxa7
- 2.e3#
- 1...Rb4
- 2.Qc5#
- 1...Rb5
- 2.Sxb5#
- 1...Rc7
- 2.Sb5#
- 1...Rd7
- 2.Sb5#
- 1...Re7
- 2.Sb5#
- 1...Rf7
- 2.Sb5#
- 1...Rg7
- 2.Sb5#
- 1...Rh7
- 2.Sb5#
- 1...Sc3
- 2.e3#
- 1...Sb4
- 2.Qc5#
- 1...Sb6
- 2.Sb5#
- 1...Qxb2
- Tries
- 1.Bxa2?
- threat
- 2.Rc4#
- 2.Qd5#
- 1...Qxa2
- 2.Qc5#
- 1...Qxf3
- 2.Rc4#
- 1...Qb4
- 2.Qd5#
- 1...Qc5
- 2.Qxc5#
- 1...Qd6
- 2.Rc4#
- 1...Qb3
- 2.Qc5#
- 1...Qc3
- 2.Qd5#
- 2.bxc3#
- 1...Qd3
- 2.Qc5#
- 2.Qd5#
- 1...Qa4
- 2.Qc5#
- 2.Qd5#
- 1...Qa5
- 2.Rc4#
- 1...Qa6
- 2.Qc5#
- 2.Qd5#
- 1...Rb4
- 2.Qc5#
- 2.Qd5#
- 1...Rb5
- 2.Sxb5#
- 2.Rc4#
- 1...Rc7
- 2.Sb5#
- 2.Qd5#
- 1...Rd7
- 2.Sb5#
- 2.Rc4#
- 1...Be5
- 2.Sf5#
- 1...Sb6
- 2.Sb5#
- 1...Sc7
- 2.Rc4#
- 2.Qh8#
- 1...Rb3!
- threat
- 1.Qg4+?
- 1...Kd5
- 2.Qe4#
- 1...Ke5
- 2.Qe4#
- 1...Bf4!
- 1...Kd5
- 1.Qb5?
- threat
- 2.Sf5#
- 2.Rc4#
- 1...Qxf3
- 2.Sxf3#
- 2.Rc4#
- 2.Qc5#
- 1...Qc5
- 2.Qxc5#
- 1...Qb4
- 2.Sf5#
- 2.e3#
- 1...Qf8
- 2.Rc4#
- 2.e3#
- 1...Qb3
- 2.Sf5#
- 2.Qc5#
- 1...Qc3
- 2.Sf5#
- 1...Qd3
- 2.Qc5#
- 1...Qa4
- 2.Sf5#
- 2.Qc5#
- 2.e3#
- 1...Rc7
- 2.Sf5#
- 1...Rf7
- 2.Rc4#
- 1...Sb6
- 2.Sf5#
- 1...Rxb5!
- threat
- 1.Qf5?
- threat
- 2.Qe4#
- 1...Qxf3
- 2.Sxf3#
- 2.Qc5#
- 1...Qd3
- 2.Qc5#
- 1...Qe3
- 2.Qc5#
- 1...Re7
- 2.Sb5#
- 1...Sc3
- 2.e3#
- 1...Qe7!
- threat
- 1.Bxa2?
- Keys
- 1.Be4!
- threat
- 2.Qd5#
- 1...Qc5
- 2.Qxc5#
- 1...Qd6
- 2.e3#
- 1...Qb3
- 2.Qc5#
- 1...Qa5
- 2.e3#
- 1...Rb5
- 2.Sxb5#
- 1...Rd7
- 2.Sb5#
- 1...Be5
- 2.Sf5#
- 1...Sc3
- 2.e3#
- 1...Sb4
- 2.Qc5#
- 1...Sb6
- 2.Sb5#
- 1...Sc7
- 2.Qh8#
- threat
- 1.Be4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 11
- Sets
- Q(b);N_GUARD,P_PINP(D)::P(E)
- Q(b);N_GUARD::QAB1(H),XQ(b)
- Q(b);N_GUARD::P(E)
- Q(b);N_GUARD::QAB1(H)
- Q(b);N_GUARD,P_PINP(E)::QAB1(H)
- Q(b);N_GUARD,XS(J)::P(E)
- R(e);S_CUTQ(b)::QAB1(H)
- R(e);N_GUARD::S(J),XR(e)
- R(e);N_GUARD::S(J)
- R(e);N_GUARD,P_PINP(E)::S(J)
- S(a);S_CUTQ(b)::P(E)
- S(a);S_CUTQ(b)::QAB1(H)
- S(f);S_CUTR(e)::S(J)
- Tries
- Try
- B(A);XS(a)
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD,XB(A)::QAB1(H)
- Q(b);XP(F)::R1(I)
- Q(b);P_PINP(D)::QAR1(H)
- Q(b);N_GUARD::QAB1(H),XQ(b)
- Q(b);::R1(I)
- Q(b);N_GUARD::QAB1(H)
- Q(b);P_PINP(D)::R1(I)
- B(g);SBLOCK::S(G)
- S(f);S_CUTR(e)::S(J)
- Refutation
- R(e);
- Try
- Q(H);CHECK
- Vars
- K(d);P-FLIGHT::QAB1(H)
- K(d);S_FLIGHT::QAR1(H)
- Refutation
- B(g);P_SPINB(g)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD::QAB1(H),XQ(b)
- Q(b);P_PINP(D)::S(G)
- Q(b);N_GUARD::QAB1(H)
- R(e);::S(G)
- R(e);::R1(I)
- S(f);::S(G)
- Refutation
- R(e);XQ(H)
- Try
- Q(H);
- Threat
- QAR1(H)
- Vars
- Q(b);N_GUARD::QAB1(H)
- Q(b);N_GUARD,P_PINP(E)::QAB1(H)
- R(e);N_GUARD,P_PINP(E)::S(J)
- S(a);S_CUTQ(b)::P(E)
- Refutation
- Q(b);P_PINP(E)
- Try
- Actual
- B(A);
- Threat
- QAR1(H)
- Vars
- Q(b);N_GUARD::QAB1(H),XQ(b)
- Q(b);N_GUARD::P(E)
- Q(b);N_GUARD::QAB1(H)
- Q(b);N_GUARD,P_PINP(D)::P(E)
- R(e);N_GUARD::S(J),XR(e)
- R(e);N_GUARD::S(J)
- B(g);SBLOCK::S(G)
- S(a);S_CUTQ(b)::P(E)
- S(a);S_CUTQ(b)::QAB1(H)
- S(f);S_CUTR(e)::S(J)
- S(f);S_CUTB(g),S_CUTR(e)::QAB(H)
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).