MESON Chess Problem Database
Problem Display
PID: 152143 (8/4p3/R7/1K1kN3/2R2ppq/7b/n4n2/1N2Q3 w - - 0 1)
McAllister, George W
Good Companions (April), 1915
#2
6 + 8
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Sc3#
- 1...Sc3+
- 2.Sxc3#
- 1...Sb4
- 2.Sc3#
- 1...Sd1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Sd3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sc1
- Tries
- 1.Sd3?
- threat
- 2.Sxf4#
- 2.Qe5#
- 2.Qe6#
- 1...Sc3+
- 2.Sxc3#
- 1...Sxd3
- 2.Qe4#
- 2.Qe6#
- 1...Qg3
- 2.Qe5#
- 2.Qe6#
- 1...Qg5
- 2.Qe6#
- 1...Qh5
- 2.Sxf4#
- 2.Qe6#
- 1...Qh6
- 2.Qe5#
- 1...Qh8
- 2.Sxf4#
- 2.Qe6#
- 1...Se4
- 2.Qxe4#
- 1...f3
- 2.Sf4#
- 2.Qe5#
- 2.Qe6#
- 1...g3
- 2.Qe5#
- 1...e5
- 2.Qxe5#
- 1...e6
- 2.Sxf4#
- 2.Qe5#
- 2.Qxe6#
- 1...Qf6!
- threat
- 1.Sf3?
- threat
- 2.Rd4#
- 2.Rc5#
- 2.Qe5#
- 2.Qe6#
- 1...Sc3+
- 2.Sxc3#
- 1...Qg5
- 2.Rd4#
- 2.Rc5#
- 2.Qe6#
- 1...Qf6
- 2.Rc5#
- 1...Qh5
- 2.Rd4#
- 2.Rc5#
- 2.Qe6#
- 1...Qh6
- 2.Rd4#
- 2.Rc5#
- 2.Qe5#
- 1...Qh8
- 2.Rc5#
- 2.Qe6#
- 1...Bf1
- 2.Qe5#
- 2.Qe6#
- 1...Sd3
- 2.Rd4#
- 2.Qe4#
- 2.Qe6#
- 1...Se4
- 2.Rd4#
- 2.Qxe4#
- 1...g3
- 2.Rd4#
- 2.Rc5#
- 2.Qe5#
- 1...e5
- 2.Rc5#
- 2.Qxe5#
- 1...e6
- 2.Rd4#
- 2.Rc5#
- 2.Qe5#
- 2.Qxe6#
- 1...gxf3!
- threat
- 1.Sg6?
- threat
- 2.Sxf4#
- 2.Qe5#
- 2.Qe6#
- 1...Sc3+
- 2.Sxc3#
- 1...Qg3
- 2.Sxe7#
- 2.Qe5#
- 2.Qe6#
- 1...Qg5
- 2.Qe6#
- 1...Qh5
- 2.Sxf4#
- 2.Sxe7#
- 2.Qe6#
- 1...Qh6
- 2.Sxe7#
- 2.Qe5#
- 2.Qe6#
- 1...Qh8
- 2.Sxf4#
- 2.Sxe7#
- 2.Qe6#
- 1...Sd3
- 2.Qe4#
- 2.Qe6#
- 1...Se4
- 2.Qxe4#
- 1...f3
- 2.Sf4#
- 2.Qe5#
- 2.Qe6#
- 1...g3
- 2.Qe5#
- 1...e5
- 2.Qxe5#
- 1...e6
- 2.Sxf4#
- 2.Qe5#
- 2.Qxe6#
- 1...Qf6!
- threat
- 1.Sd7?
- threat
- 2.Qe5#
- 2.Qe6#
- 1...Sc3+
- 2.Sxc3#
- 1...Qg5
- 2.Qe6#
- 1...Qh5
- 2.Qe6#
- 1...Qh6
- 2.Qe5#
- 1...Qh8
- 2.Qe6#
- 1...Sd3
- 2.Qe4#
- 2.Qe6#
- 1...Se4
- 2.Qxe4#
- 1...g3
- 2.Qe5#
- 1...e5
- 2.Qxe5#
- 1...e6
- 2.Qe5#
- 2.Qxe6#
- 1...Qf6!
- threat
- 1.Sf7?
- threat
- 2.Qe5#
- 2.Qe6#
- 1...Sc3+
- 2.Sxc3#
- 1...Qg5
- 2.Qe6#
- 1...Qh5
- 2.Qe6#
- 1...Qh6
- 2.Qe5#
- 1...Qh8
- 2.Qe6#
- 1...Sd3
- 2.Qe4#
- 2.Qe6#
- 1...Se4
- 2.Qxe4#
- 1...g3
- 2.Qe5#
- 1...e5
- 2.Rd6#
- 2.Qxe5#
- 1...e6
- 2.Rd6#
- 2.Qe5#
- 2.Qxe6#
- 1...Qf6!
- threat
- 1.Qe3?
- threat
- 2.Rd4#
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Sc3+
- 2.Sxc3#
- 1...Se4
- 2.Qd4#
- 2.Qxe4#
- 1...Bf1
- 2.Qd4#
- 2.Qc5#
- 1...Sd3
- 2.Rd4#
- 2.Qd4#
- 2.Qe4#
- 1...fxe3!
- threat
- 1.Sd3?
- Keys
- 1.Ka4!
- threat
- 2.Qa5#
- 1...Sc3+
- 2.Sxc3#
- 1...Se4
- 2.Qxe4#
- 1...Sb4
- 2.Sc3#
- 1...Sd3
- 2.Qe4#
- threat
- 1.Ka4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- S(a);N_GUARD::S(A)
- S(a);CHECK,N_GUARD::S(A),XS(a)
- S(b);N_GUARD::QAB1(B)
- S(b);N_GUARD::QAB1(B),XS(b)
- Tries
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- S(a);CHECK,N_GUARD::S(A),XS(a)
- Q(f);::QAB1(B)
- Q(f);::QAR1(B)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(e);::QAR1(B)
- P(h);::QAR1(B),XP(h)
- Refutation
- Q(f);
- Try
- S(E);
- Threat
- DUALS(4)
- Vars
- S(a);CHECK,N_GUARD::S(A),XS(a)
- Q(f);::R1(C)
- Refutation
- P(e);XS(E)
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- S(a);CHECK,N_GUARD::S(A),XS(a)
- Q(f);::QAB1(B)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(e);::QAR1(B)
- P(h);::QAR1(B),XP(h)
- Refutation
- Q(f);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- S(a);CHECK,N_GUARD::S(A),XS(a)
- Q(f);::QAB1(B)
- Q(f);::QAR1(B)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(e);::QAR1(B)
- P(h);::QAR1(B),XP(h)
- Refutation
- Q(f);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- S(a);CHECK,N_GUARD::S(A),XS(a)
- Q(f);::QAB1(B)
- Q(f);::QAR1(B)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(e);::QAR1(B)
- Refutation
- Q(f);
- Try
- Q(B);
- Threat
- DUALS(4)
- Vars
- S(a);CHECK,N_GUARD::S(A),XS(a)
- Refutation
- P(d);XQ(B)
- Try
- Actual
- K(D);S_FLIGHT
- Threat
- QAR(B)
- Vars
- S(a);CHECK,N_GUARD::S(A),XS(a)
- S(b);N_GUARD::QAB1(B),XS(b)
- S(a);N_GUARD::S(A)
- S(b);N_GUARD::QAB1(B)
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).