MESON Chess Problem Database

Problem Display
PID: 153659 (8/5pn1/2B2p1K/3P1kp1/Q3R3/4p3/4N3/4b3 w - - 0 1)

Keeble, John Frederick

Cheltenham Examiner, 1890

(First published on Wed Apr 30 1890)

8/5pn1/2B2p1K/3P1kp1/Q3R3/4p3/4N3/4b3

#2

6 + 7

15239 Valois Notebooks 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Sg3#
    • 1...Bc3
      • 2.Sg3#
    • 1...Bg3
      • 2.Sxg3#
    • 1...Bb4
      • 2.Sg3#
    • 1...Ba5
      • 2.Sg3#
    • 1...Sh5
      • 2.Bd7#
    • 1...Se8
      • 2.Bd7#
  • Tries
    • 1.Kxg7?
      • threat
        • 2.Bd7#
      • 1...Bb4
        • 2.Sg3#
      • 1...g4!
    • 1.Rf4+?
      • 1...gxf4
        • 2.Qxf4#
      • 1...Ke5!
    • 1.Qc2?
      • threat
        • 2.Sd4#
      • 1...Bc3
        • 2.Sg3#
      • 1...Se6!
    • 1.d6?
      • threat
        • 2.Sd4#
        • 2.Qb5#
      • 1...Bc3
        • 2.Sg3#
      • 1...Bg3
        • 2.Sxg3#
        • 2.Sd4#
      • 1...Bb4
        • 2.Sg3#
        • 2.Sd4#
      • 1...Se6!
  • Keys
    • 1.Qb5!
      • threat
        • 2.d6#
      • 1...Kxe4
        • 2.d6#
      • 1...Bc3
        • 2.Sg3#
      • 1...Bg3
        • 2.Sxg3#
      • 1...Bb4
        • 2.Sg3#
      • 1...Se6
        • 2.dxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::S(A)
    • B(a);N_GUARD::S(A),XB(a)
    • S(g);N_GUARD::B(E)
  • Tries
    • Try
      • K(F);S_FLIGHT,XS(g)
      • Threat
        • B(E)
      • Vars
        • B(a);N_GUARD::S(A)
      • Refutation
        • P(d);
    • Try
      • R(C);CHECK
      • Vars
        • P(d);OGATE,XR(C)::QAR1(B),XP(d)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • S(A)
      • Vars
        • B(a);N_GUARD::S(A)
      • Refutation
        • S(g);
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD::S(A)
      • Refutation
        • S(g);
  • Actual
    • Q(B);
    • Threat
      • QAR(B)+P(D)
    • Vars
      • K(c);S_FLIGHT,XR(C)::B(E)+P(D)
      • B(a);N_GUARD::S(A)
      • B(a);N_GUARD::S(A),XB(a)
      • S(g);OGATE::QAR(B)+P(D),XS(g)
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