MESON Chess Problem Database

Problem Display
PID: 49142 (Q2B4/8/8/2p1kpNK/2n2N2/8/3P4/8 w - - 0 1)

van Eelde, Antonie Clarus Johannes

Nederlandse Schaakbond, 1899

Q2B4/8/8/2p1kpNK/2n2N2/8/3P4/8

#2

6 + 4

204 Op de Hoogte 1907
3713 Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Sf3#
      • 2.Qd5#
    • 1...Kd6
      • 2.Qd5#
  • Tries
    • 1.Sf3+?
      • 1...Kd6
        • 2.Qd5#
      • 1...Kxf4!
    • 1.Sf7+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxf4!
    • 1.Bc7+?
      • 1...Kd4
        • 2.Sf3#
        • 2.Sge6#
        • 2.Qd5#
      • 1...Kf6
        • 2.Qf8#
      • 1...Sd6!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Qd5#
        • 2.Qe6#
      • 1...fxe4!
  • Keys
    • 1.Qa4!
      • 1...Kd4
        • 2.Bf6#
      • 1...Kxf4
        • 2.Bc7#
      • 1...Kd6
        • 2.Sf7#
      • 1...Sxd2
        • 2.Sf7#
      • 1...Se3
        • 2.Sf7#
      • 1...Sb2
        • 2.Sf7#
      • 1...Sa3
        • 2.Sf7#
      • 1...Sa5
        • 2.Sf7#
      • 1...Sb6
        • 2.Sf7#
      • 1...Sd6
        • 2.Sf3#

This anticipates 21961(1922)

FEATURES

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