MESON Chess Problem Database

Problem Display
PID: 143497 (8/8/8/8/4nN2/3Q2n1/3p2K1/4kN2 w - - 0 1)

Keeble, John Frederick

British Chess Magazine, 1895

8/8/8/8/4nN2/3Q2n1/3p2K1/4kN2

#2

4 + 4

15 British Chess Magazine 1901

SOLUTION

  • SOUND
  • Sets
    • 1...Kd1
      • 2.Qb1#
    • 1...Sxf1
      • 2.Qxf1#
      • 2.Qe2#
    • 1...Sh1
      • 2.Qe2#
    • 1...Se2
      • 2.Qxe2#
    • 1...Sf5
      • 2.Qe2#
    • 1...Sh5
      • 2.Qe2#
    • 1...Sf2
      • 2.Qxd2#
    • 1...Sc3
      • 2.Qxd2#
    • 1...Sc5
      • 2.Qxd2#
    • 1...Sg5
      • 2.Qxd2#
    • 1...Sd6
      • 2.Qxd2#
    • 1...Sf6
      • 2.Qxd2#
  • Tries
    • 1.Qxe4+?
      • 1...Kd1
        • 2.Qb1#
      • 1...Se2
        • 2.Qxe2#
      • 1...Sxe4!
    • 1.Qe3+?
      • 1...Se2
        • 2.Qxe2#
      • 1...Kd1!
  • Keys
    • 1.Kg1!
      • 1...Se2+
        • 2.Qxe2#
      • 1...Kd1
        • 2.Qb1#
      • 1...Sxf1
        • 2.Qxf1#
        • 2.Qe2#
      • 1...d1Q
        • 2.Sg2#
      • 1...d1S
        • 2.Sg2#
      • 1...d1B
        • 2.Sg2#
      • 1...d1R
        • 2.Sg2#
      • 1...Sh1
        • 2.Qe2#
      • 1...Sf5
        • 2.Qe2#
      • 1...Sh5
        • 2.Qe2#
      • 1...Sf2
        • 2.Qxd2#
      • 1...Sc3
        • 2.Qxd2#
      • 1...Sc5
        • 2.Qxd2#
      • 1...Sg5
        • 2.Qxd2#
      • 1...Sd6
        • 2.Qxd2#
      • 1...Sf6
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINP(b)::QAR2(C)
    • S(c);N_GUARD::QAR1(C)
    • S(c);N_GUARD::QAR1(C),XS(c)
    • S(d);N_GUARD::QAB1(C),XP(b)
  • Tries
    • Try
      • Q(C);CHECK,XS(d)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • S(c);N_GUARD,P_SPINS(c)::QAR1(C),XS(c)
      • Refutation
        • S(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(C),XS(c)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • S(c);CHECK,N_GUARD::QAR1(C),XS(c)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR2(C)
      • P(b);::S(D)
      • S(c);N_GUARD::QAR1(C)
      • S(d);N_GUARD::QAB1(C),XP(b)
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