MESON Chess Problem Database

Problem Display
PID: 21961 (4B2Q/8/8/KNpk1p2/2N2n2/8/4P3/8 w - - 0 1)

van Eelde, Antonie Clarus Johannes

Hull Times, 1922

4B2Q/8/8/KNpk1p2/2N2n2/8/4P3/8

#2

6 + 4

3713 Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sc3#
      • 2.Qe5#
    • 1...Ke6
      • 2.Qe5#
  • Tries
    • 1.Sc3+?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxc4!
    • 1.Sc7+?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kxc4!
    • 1.Bf7+?
      • 1...Ke4
        • 2.Sc3#
        • 2.Sbd6#
        • 2.Qe5#
      • 1...Kc6
        • 2.Qc8#
      • 1...Se6!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Qe5#
        • 2.Qd6#
      • 1...cxd4!
  • Keys
    • 1.Qh4!
      • 1...Kxc4
        • 2.Bf7#
      • 1...Ke4
        • 2.Bc6#
      • 1...Ke6
        • 2.Sc7#
      • 1...Sxe2
        • 2.Sc7#
      • 1...Sd3
        • 2.Sc7#
      • 1...Sg2
        • 2.Sc7#
      • 1...Sh3
        • 2.Sc7#
      • 1...Sh5
        • 2.Sc7#
      • 1...Se6
        • 2.Sc3#
      • 1...Sg6
        • 2.Sc7#

Anticipated by 49142(1899)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAR1(F)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(F)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
    • Try
      • S(D);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(F)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
    • Try
      • B(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(F)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(F);CHECK
      • Refutation
        • P(b);XQ(F)
  • Actual
    • Q(F);
    • Vars
      • K(c);P_SPINS(a),S_FLIGHT,XS(B)::B(E)
      • K(c);P_SPINS(a),S_FLIGHT::B(E)
      • K(c);S_FLIGHT::S(D)
      • S(a);XP(A)::S(D)
      • S(a);::S(D)
      • S(a);SBLOCK::S(D)
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