MESON Chess Problem Database

Problem Display
PID: 154419 (4B2Q/8/8/1Npk1p2/P1N2n2/P2p4/3p4/3K4 w - - 0 1)

Jespersen, Karl Lorenz Jesper

Illustrated Family Journal, 1900

4B2Q/8/8/1Npk1p2/P1N2n2/P2p4/3p4/3K4

#2

7 + 6

4035 Aarsskrift for DSK 1935
3713 Snap 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qe5#
  • Tries
    • 1.Sc3+?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxc4!
    • 1.Sbd6?
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Sg6!
    • 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...Se2
        • 2.Sc7#
      • 1...Sg2
        • 2.Sc7#
      • 1...Sh3
        • 2.Sc7#
      • 1...Sh5
        • 2.Sc7#
      • 1...Se6
        • 2.Sc3#
      • 1...Sg6
        • 2.Sc7#

This anticipates 49149(1907)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT::QAR1(G)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(G)
      • Refutation
        • K(e);S_FLIGHT,XS(D)
    • Try
      • S(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(e);S_FLIGHT::QAR1(G)
      • Refutation
        • S(c);
    • Try
      • Q(G);CHECK
      • Refutation
        • P(d);XQ(G)
  • Actual
    • Q(G);
    • Vars
      • K(e);P_SPINS(c),S_FLIGHT,XS(D)::B(F)
      • K(e);P_SPINS(c),S_FLIGHT::B(F)
      • K(e);S_FLIGHT::S(E)
      • S(c);::S(E)
      • S(c);SBLOCK::S(E)
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