MESON Chess Problem Database

Problem Display
PID: 152136 (n3k1b1/3p2Pp/4q1PN/4R3/7B/1Q3B2/Kn6/8 w - - 0 1)

Thomson, Robert Gavin

Good Companions (April), 1915

n3k1b1/3p2Pp/4q1PN/4R3/7B/1Q3B2/Kn6/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Qxg8#
    • 1...Qe7
      • 2.Qxg8#
    • 1...Bf7
      • 2.gxf7#
    • 1...Sc4
      • 2.Qb8#
    • 1...d5
      • 2.Qb5#
    • 1...d6
      • 2.Bc6#
  • Tries
    • 1.Ka1?
      • threat
        • 2.Qb8#
      • 1...Qxe5
        • 2.Qxg8#
      • 1...d5
        • 2.Qb5#
      • 1...d6
        • 2.Bc6#
        • 2.Qb5#
      • 1...Sb6!
    • 1.Kb1?
      • threat
        • 2.Qb8#
      • 1...Qxe5
        • 2.Qxg8#
      • 1...d5
        • 2.Qb5#
      • 1...d6
        • 2.Bc6#
        • 2.Qb5#
      • 1...Sb6!
    • 1.Rxe6+?
      • 1...dxe6
        • 2.Bc6#
        • 2.Qb5#
      • 1...Bxe6!
    • 1.Qxe6+?
      • 1...dxe6
        • 2.Bc6#
      • 1...Bxe6+!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sd6#
      • 1...Qxe5
        • 2.Qxg8#
      • 1...Qe7
        • 2.Qxg8#
      • 1...d5
        • 2.Qb5#
      • 1...d6
        • 2.Bc6#
      • 1...Sc4
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_SPINQ(b),XR(E)::QAR2(B),XB(g)
    • Q(b);::QAR2(B),XB(g)
    • B(g);OGATE::P(F),XB(g)
    • S(a);N_PINQ(B)::QAR(B)
    • P(c);N_PINQ(B)::QAB(B)
    • P(c);OGATEB::B(C)
  • Tries
    • Try
      • K(A);N_SPINQ(B),P-FLIGHT
      • Threat
        • QAR(B)
      • Vars
        • Q(b);N_SPINQ(b),OGATE,XR(E)::QAR2(B),XB(g)
        • P(c);OGATEB::QAB(B)
      • Refutation
        • S(e);
    • Try
      • K(A);N_SPINQ(B),S_FLIGHT
      • Threat
        • QAR(B)
      • Vars
        • Q(b);N_SPINQ(b),OGATE,XR(E)::QAR2(B),XB(g)
        • P(c);OGATEB::QAB(B)
      • Refutation
        • S(e);
    • Try
      • R(E);CHECK,N_SPINQ(B),XQ(b)
      • Refutation
        • B(g);P_PINQ(B),XR(E)
    • Try
      • Q(B);CHECK,XQ(b)
      • Vars
        • P(c);P_SPINP(c),S_CUTB(g),XQ(B)::B(C)
      • Refutation
        • B(g);CHECK,P_SPINB(g),XQ(B)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • Q(b);N_SPINQ(b),XR(E)::QAR2(B),XB(g)
      • Q(b);::QAR2(B),XB(g)
      • P(c);N_PINQ(B)::QAB(B)
      • P(c);OGATEB::B(C)
      • S(a);N_PINQ(B)::QAR(B)
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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).