MESON Chess Problem Database

Problem Display
PID: 108174 (B3K3/8/2n2R2/3NkP2/1p4P1/1P6/3B4/7Q w - - 0 1)

Graham, John H

Orillia Packet, 1897

B3K3/8/2n2R2/3NkP2/1p4P1/1P6/3B4/7Q

#2

9 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Bf4#
  • Tries
    • 1.Sxb4?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Sxb4
        • 2.Qa1#
      • 1...Sa5
        • 2.Qa1#
      • 1...Sa7
        • 2.Qa1#
      • 1...Se7
        • 2.Qa1#
      • 1...Sb8
        • 2.Qa1#
      • 1...Sd8
        • 2.Qa1#
      • 1...Sd4!
    • 1.Sc7?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Sa5
        • 2.Qa1#
      • 1...Sa7
        • 2.Qa1#
      • 1...Se7
        • 2.Qa1#
      • 1...Sb8
        • 2.Qa1#
      • 1...Sd8
        • 2.Qa1#
      • 1...Sd4!
    • 1.Se7?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Sxe7
        • 2.Qa1#
      • 1...Sa5
        • 2.Qa1#
      • 1...Sa7
        • 2.Qa1#
      • 1...Sb8
        • 2.Qa1#
      • 1...Sd8
        • 2.Qa1#
      • 1...Sd4!
    • 1.Bc1?
      • 1...Sd4
        • 2.Bf4#
      • 1...Sa5
        • 2.Bb2#
      • 1...Sa7
        • 2.Bb2#
      • 1...Se7
        • 2.Bb2#
      • 1...Sb8
        • 2.Bb2#
      • 1...Sd8
        • 2.Bb2#
      • 1...Kd4!
    • 1.Bc3+?
      • 1...Sd4
        • 2.Re6#
        • 2.Qe1#
      • 1...bxc3!
    • 1.Be3?
      • threat
        • 2.Re6#
      • 1...Sd4
        • 2.Bf4#
      • 1...Sd8!
    • 1.Qf3?
      • 1...Sa5
        • 2.Qe3#
        • 2.Qf4#
      • 1...Sd4
        • 2.Bf4#
        • 2.Qe3#
        • 2.Qf4#
      • 1...Sa7
        • 2.Qe3#
        • 2.Qf4#
      • 1...Se7
        • 2.Qe3#
        • 2.Qf4#
      • 1...Sb8
        • 2.Qe3#
        • 2.Qf4#
      • 1...Sd8
        • 2.Qe3#
        • 2.Qf4#
      • 1...Kd4!
  • Keys
    • 1.Sb6!
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Sd4
        • 2.Sd7#
      • 1...Sa5
        • 2.Qa1#
      • 1...Sa7
        • 2.Qa1#
      • 1...Se7
        • 2.Qa1#
      • 1...Sb8
        • 2.Qa1#
      • 1...Sd8
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::B(B)
  • Tries
    • Try
      • S(E);XP(a)
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);OGATEB,S_FLIGHT,XR(G)::QAB(A)
        • S(c);N_GUARD,XS(E)::QAB(A)
        • S(c);N_GUARD::QAB(A)
      • Refutation
        • S(c);
    • Try
      • S(E);
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);OGATEB,S_FLIGHT,XR(G)::QAB(A)
        • S(c);N_GUARD::QAB(A)
      • Refutation
        • S(c);
    • Try
      • S(E);
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);OGATEB,S_FLIGHT,XR(G)::QAB(A)
        • S(c);N_GUARD,XS(E)::QAB(A)
        • S(c);N_GUARD::QAB(A)
      • Refutation
        • S(c);
    • Try
      • B(B);
      • Vars
        • S(c);SBLOCK::B(B)
        • S(c);N_GUARD::B(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(B);CHECK
      • Refutation
        • P(a);XB(B)
    • Try
      • B(B);
      • Threat
        • R1(G)
      • Vars
        • S(c);SBLOCK::B(B)
      • Refutation
        • S(c);
    • Try
      • Q(A);
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(E);
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);OGATEB,S_FLIGHT,XR(G)::QAB(A)
      • S(c);SBLOCK::S(E)
      • S(c);N_GUARD::QAB(A)
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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).