MESON Chess Problem Database
Problem Display
PID: 63418 (6QK/3p4/3B4/1p5n/1Pp1k3/q1pnPp1B/8/1R1N1N2 w - - 0 1)
Schumer, Jacob
Williams, Philip Hamilton
Chess Amateur (The), 1909
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Qa8#
- 1...Qb2
- 2.Qa8#
- 1...Qxb4
- 2.Qa8#
- 1...Qa2
- 2.Sxc3#
- 1...Qb3
- 2.Qa8#
- 1...Qa4
- 2.Sxc3#
- 1...Qa5
- 2.Sxc3#
- 1...Qa6
- 2.Sxc3#
- 1...Qa7
- 2.Sxc3#
- 1...Qa8
- 2.Sxc3#
- 2.Qxa8#
- 1...Sc1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sxb4
- 2.Sf2#
- 1...Sdf4
- 2.Sf2#
- 1...Sc5
- 2.Sf2#
- 1...Se5
- 2.Sf2#
- 1...Sg3
- 2.Sxg3#
- 1...Shf4
- 2.Sg3#
- 1...Sf6
- 2.Sg3#
- 1...Sg7
- 2.Sg3#
- 1...c2
- 2.Sd2#
- 1...f2
- 2.Qg2#
- 1...Qc1
- Tries
- 1.Be6?
- threat
- 2.Qh7#
- 2.Qg6#
- 1...Sdf4
- 2.Sf2#
- 1...Se5
- 2.Sf2#
- 1...f2
- 2.Qg2#
- 1...Qa8
- 2.Sxc3#
- 2.Qxa8#
- 1...Sg3
- 2.Sxg3#
- 1...Shf4
- 2.Sg3#
- 1...Sf6
- 2.Sg3#
- 2.Qg6#
- 1...Sg7
- 2.Sg3#
- 1...dxe6!
- threat
- 1.Bxd7?
- 1...Qxb4
- 2.Qa8#
- 1...Sxb4
- 2.Sf2#
- 1...Sc1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sdf4
- 2.Sf2#
- 1...Sc5
- 2.Sf2#
- 1...Se5
- 2.Sf2#
- 1...f2
- 2.Qg2#
- 1...Qc1
- 2.Qa8#
- 1...Qb2
- 2.Qa8#
- 1...Qa2
- 2.Sxc3#
- 1...Qb3
- 2.Qa8#
- 1...Qa4
- 2.Sxc3#
- 1...Qa5
- 2.Sxc3#
- 1...Qa6
- 2.Sxc3#
- 1...Qa7
- 2.Sxc3#
- 1...Qa8
- 2.Sxc3#
- 2.Qxa8#
- 1...Sg3
- 2.Sxg3#
- 1...Shf4
- 2.Sg3#
- 1...Sf6
- 2.Sg3#
- 1...Sg7
- 2.Sg3#
- 1...c2
- 2.Sd2#
- 1...Qa1!
- 1...Qxb4
- 1.Ra1?
- 1...Qxb4
- 2.Qa8#
- 1...Sxb4
- 2.Sf2#
- 1...Sc1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sdf4
- 2.Sf2#
- 1...Sc5
- 2.Sf2#
- 1...Se5
- 2.Sf2#
- 1...f2
- 2.Qg2#
- 1...Qc1
- 2.Qa8#
- 1...Qb2
- 2.Qa8#
- 1...Qa2
- 2.Sxc3#
- 1...Qb3
- 2.Qa8#
- 1...Qa4
- 2.Sxc3#
- 1...Qa5
- 2.Sxc3#
- 1...Qa6
- 2.Sxc3#
- 1...Qa7
- 2.Sxc3#
- 1...Qa8
- 2.Sxc3#
- 2.Qxa8#
- 1...Sg3
- 2.Sxg3#
- 1...Shf4
- 2.Sg3#
- 1...Sf6
- 2.Sg3#
- 1...Sg7
- 2.Sg3#
- 1...c2
- 2.Sd2#
- 1...Qxa1!
- 1...Qxb4
- 1.Rc1?
- 1...Qxc1
- 2.Qa8#
- 1...Qxb4
- 2.Qa8#
- 1...Sxc1
- 2.Sf2#
- 1...Sxb4
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sdf4
- 2.Sf2#
- 1...Sc5
- 2.Sf2#
- 1...Se5
- 2.Sf2#
- 1...f2
- 2.Qg2#
- 1...Qb2
- 2.Qa8#
- 1...Qa2
- 2.Sxc3#
- 1...Qb3
- 2.Qa8#
- 1...Qa4
- 2.Sxc3#
- 1...Qa5
- 2.Sxc3#
- 1...Qa6
- 2.Sxc3#
- 1...Qa7
- 2.Sxc3#
- 1...Qa8
- 2.Sxc3#
- 2.Qxa8#
- 1...Sg3
- 2.Sxg3#
- 1...Shf4
- 2.Sg3#
- 1...Sf6
- 2.Sg3#
- 1...Sg7
- 2.Sg3#
- 1...c2
- 2.Sd2#
- 1...Qa1!
- 1...Qxc1
- 1.Rb3?
- threat
- 2.Sxc3#
- 1...Qxb4
- 2.Qa8#
- 1...Qxb3
- 2.Qa8#
- 1...Sxb4
- 2.Sf2#
- 1...Sc1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sdf4
- 2.Sf2#
- 1...Sc5
- 2.Sf2#
- 1...Se5
- 2.Sf2#
- 1...f2
- 2.Qg2#
- 1...Qc1
- 2.Qa8#
- 1...Qb2
- 2.Qa8#
- 1...c2
- 2.Sc3#
- 2.Sd2#
- 1...Qa1!
- threat
- 1.Qe6+?
- 1...Se5
- 2.Sf2#
- 2.Bf5#
- 1...dxe6!
- 1...Se5
- 1.Qf7?
- threat
- 2.Bf5#
- 2.Qf5#
- 1...Se5
- 2.Sf2#
- 2.Bf5#
- 1...Sg3
- 2.Sxg3#
- 1...Sf6
- 2.Sg3#
- 1...Sg7
- 2.Sg3#
- 1...f2
- 2.Bg2#
- 2.Qf5#
- 1...Qa8+!
- threat
- 1.Qg4+?
- 1...Sdf4
- 2.Qf5#
- 1...Shf4
- 2.Qf5#
- 1...Kd5!
- 1...Sdf4
- 1.Be6?
- Keys
- 1.Rb2!
- 1...Qxb2
- 2.Qa8#
- 1...Qxb4
- 2.Qa8#
- 1...Sxb2
- 2.Sf2#
- 1...Sxb4
- 2.Sf2#
- 1...cxb2
- 2.Sd2#
- 1...Sc1
- 2.Sf2#
- 1...Se1
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sdf4
- 2.Sf2#
- 1...Sc5
- 2.Sf2#
- 1...Se5
- 2.Sf2#
- 1...f2
- 2.Qg2#
- 1...Qa1
- 2.Sxc3#
- 1...Qa2
- 2.Sxc3#
- 1...Qb3
- 2.Qa8#
- 1...Qa4
- 2.Sxc3#
- 1...Qa5
- 2.Sxc3#
- 1...Qa6
- 2.Sxc3#
- 1...Qa7
- 2.Sxc3#
- 1...Qa8
- 2.Sxc3#
- 2.Qxa8#
- 1...Sg3
- 2.Sxg3#
- 1...Shf4
- 2.Sg3#
- 1...Sf6
- 2.Sg3#
- 1...Sg7
- 2.Sg3#
- 1...c2
- 2.Sd2#
- 1...Qxb2
- 1.Rb2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- Q(a);N_GUARD::QAB(H)
- Q(a);N_GUARD,XP(F)::QAB(H)
- Q(a);N_GUARD::S(B),XP(b)
- S(c);N_GUARD::S(B)
- S(c);N_GUARD::S(B),XS(c)
- S(c);N_GUARD,XP(F)::S(B)
- S(h);N_GUARD::S(C),XS(h)
- S(h);N_GUARD::S(C)
- P(b);N_GUARD::S(C)
- P(d);OGATEB::QAB(H)
- Tries
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- S(c);N_GUARD::S(B)
- P(d);OGATEB::QAB(H)
- S(h);N_GUARD::S(C),XS(h)
- S(h);N_GUARD::S(C)
- Refutation
- P(i);XB(E)
- Try
- B(E);XP(i)
- Vars
- Q(a);N_GUARD,XP(F)::QAB(H)
- S(c);N_GUARD,XP(F)::S(B)
- S(c);N_GUARD::S(B)
- S(c);N_GUARD::S(B),XS(c)
- P(d);OGATEB::QAB(H)
- Q(a);N_GUARD::QAB(H)
- Q(a);N_GUARD::S(B),XP(b)
- S(h);N_GUARD::S(C),XS(h)
- S(h);N_GUARD::S(C)
- P(b);N_GUARD::S(C)
- Refutation
- Q(a);
- Try
- R(A);
- Vars
- Q(a);N_GUARD,XP(F)::QAB(H)
- S(c);N_GUARD,XP(F)::S(B)
- S(c);N_GUARD::S(B)
- S(c);N_GUARD::S(B),XS(c)
- P(d);OGATEB::QAB(H)
- Q(a);N_GUARD::QAB(H)
- Q(a);N_GUARD::S(B),XP(b)
- S(h);N_GUARD::S(C),XS(h)
- S(h);N_GUARD::S(C)
- P(b);N_GUARD::S(C)
- Refutation
- Q(a);XR(A)
- Try
- R(A);
- Vars
- Q(a);N_GUARD,XR(A)::QAB(H)
- Q(a);N_GUARD,XP(F)::QAB(H)
- S(c);N_GUARD,XR(A)::S(B)
- S(c);N_GUARD,XP(F)::S(B)
- S(c);N_GUARD::S(B)
- S(c);N_GUARD::S(B),XS(c)
- P(d);OGATEB::QAB(H)
- Q(a);N_GUARD::QAB(H)
- Q(a);N_GUARD::S(B),XP(b)
- S(h);N_GUARD::S(C),XS(h)
- S(h);N_GUARD::S(C)
- P(b);N_GUARD::S(C)
- Refutation
- Q(a);
- Try
- R(A);
- Threat
- S(B),XP(b)
- Vars
- Q(a);N_GUARD,XP(F)::QAB(H)
- Q(a);N_GUARD,XR(A)::QAB(H)
- S(c);N_GUARD,XP(F)::S(B)
- S(c);N_GUARD::S(B)
- S(c);N_GUARD::S(B),XS(c)
- P(d);OGATEB::QAB(H)
- Q(a);N_GUARD::QAB(H)
- Refutation
- Q(a);
- Try
- Q(H);CHECK
- Refutation
- P(i);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- S(h);N_GUARD::S(C),XS(h)
- S(h);N_GUARD::S(C)
- Refutation
- Q(a);CHECK
- Try
- Q(H);CHECK
- Vars
- S(c);P_SPINS(c)::QAB1(H)
- S(h);P_SPINS(h)::QAB1(H)
- Refutation
- K(f);S_FLIGHT
- Try
- Actual
- R(A);
- Vars
- Q(a);N_GUARD,XR(A)::QAB(H)
- Q(a);N_GUARD,XP(F)::QAB(H)
- S(c);N_GUARD,XR(A)::S(B)
- S(c);N_GUARD,XP(F)::S(B)
- P(b);N_GUARD,XR(A)::S(C)
- S(c);N_GUARD::S(B)
- S(c);N_GUARD::S(B),XS(c)
- P(d);OGATEB::QAB(H)
- Q(a);N_GUARD::S(B),XP(b)
- Q(a);N_GUARD::QAB(H)
- S(h);N_GUARD::S(C),XS(h)
- S(h);N_GUARD::S(C)
- P(b);N_GUARD::S(C)
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).