MESON Chess Problem Database

Problem Display
PID: 144540 (7Q/b4B2/8/2k5/P1N1n3/8/2K5/8 w - - 0 1)

Grundy, WH

British Chess Magazine, 1898

7Q/b4B2/8/2k5/P1N1n3/8/2K5/8

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qc8#
  • Tries
    • 1.Qe5+?
      • 1...Kb4
        • 2.Qa5#
        • 2.Qb5#
      • 1...Kc6!
    • 1.Qb8?
      • 1...Kd4
        • 2.Qe5#
      • 1...Kc6
        • 2.Qc8#
      • 1...Bb6
        • 2.Qxb6#
      • 1...Sd2
        • 2.Qd6#
      • 1...Sf2
        • 2.Qd6#
      • 1...Sc3
        • 2.Qd6#
      • 1...Sg3
        • 2.Qd6#
      • 1...Sg5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sf6
        • 2.Qd6#
      • 1...Bxb8!
    • 1.Qf8+?
      • 1...Kc6
        • 2.Qc8#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Kd4!
  • Keys
    • 1.Qd8!
      • 1...Kb4
        • 2.Qa5#
      • 1...Kc6
        • 2.Qc8#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Bb6
        • 2.Qxb6#
      • 1...Bb8
        • 2.Qb6#
      • 1...Sd2
        • 2.Qd6#
      • 1...Sf2
        • 2.Qd6#
      • 1...Sc3
        • 2.Qd6#
      • 1...Sg3
        • 2.Qd6#
      • 1...Sg5
        • 2.Qd6#
      • 1...Sf6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • K(b);P-FLIGHT::QAR2(E)
        • B(c);N_GUARD::QAB1(E),XB(c)
        • S(a);N_GUARD::QAB1(E)
        • S(a);N_GUARD::QAB1(E),XS(a)
      • Refutation
        • B(c);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(E)
        • S(a);N_GUARD,P_SPINS(a)::QAB1(E),XS(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::QAB1(E)
      • K(b);P-FLIGHT::QAR2(E)
      • S(a);N_GUARD::QAB1(E),XS(a)
      • B(c);N_GUARD::QAB1(E),XB(c)
      • B(c);N_GUARD::QAB1(E)
      • S(a);N_GUARD::QAB1(E)
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