MESON Chess Problem Database

Problem Display
PID: 143747 (b7/4bK2/2N4p/Q2N2kp/7n/1n5B/8/8 w - - 0 1)

Gilberg, Charles Alexander

British Chess Magazine, 1896

b7/4bK2/2N4p/Q2N2kp/7n/1n5B/8/8

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bd8
      • 2.Qxd8#
    • 1...Sa1
      • 2.Qd2#
    • 1...Sc1
      • 2.Qd2#
    • 1...Sd2
      • 2.Qxd2#
    • 1...Sd4
      • 2.Qd2#
    • 1...Sc5
      • 2.Qd2#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Qg3#
        • 2.Qf4#
        • 2.Qxe7#
      • 1...Sg2
        • 2.Qg3#
        • 2.Qxe7#
      • 1...Sf5
        • 2.Qf4#
      • 1...Sg6
        • 2.Qg3#
      • 1...Bc5
        • 2.Qg3#
        • 2.Qf4#
      • 1...Ba3
        • 2.Qg3#
        • 2.Qf4#
      • 1...Bb4
        • 2.Qg3#
        • 2.Qf4#
      • 1...Bf6
        • 2.Qg3#
        • 2.Qf4#
      • 1...Bd8
        • 2.Qg3#
        • 2.Qf4#
        • 2.Qxd8#
      • 1...Bf8
        • 2.Qg3#
        • 2.Qf4#
      • 1...Bd6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Se6#
      • 1...Sxd4
        • 2.Qd2#
      • 1...Sg2
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sf5
        • 2.Sf3#
      • 1...Sg6
        • 2.Sf3#
      • 1...Sc5
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(f);OGATEB::QAB(B),XB(f)
    • S(a);N_GUARD::QAB(B)
    • S(a);N_GUARD::QAB(B),XS(a)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);::QAB1(B)
        • S(b);::QAR2(B)
      • Refutation
        • B(f);
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • S(a);N_GUARD,XS(D)::QAB(B)
      • S(b);N_GUARD::S(D)
      • S(b);N_GUARD::S(D),XS(b)
      • S(a);N_GUARD::QAB(B)
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