MESON Chess Problem Database

Problem Display
PID: 248221 (5B2/5p2/Q1p1pk2/2Nb3B/1p4Pb/1P4p1/6N1/1K6 w - - 0 1)

von Bilow, Ludwig Immanuel

New York Turf, Field and Farm, 1875

5B2/5p2/Q1p1pk2/2Nb3B/1p4Pb/1P4p1/6N1/1K6

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qa1#
    • 1...Bg5
      • 2.Sd7#
  • Tries
    • 1.Qf1+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kg5
        • 2.Qf4#
      • 1...Bf3!
    • 1.Qa1+?
      • 1...Kg5
        • 2.Qg7#
      • 1...e5!
  • Keys
    • 1.Qa5!
      • 1...Be4+
        • 2.Sxe4#
      • 1...Ke5
        • 2.Qa1#
      • 1...Kg5
        • 2.Se4#
      • 1...Bxg2
        • 2.Sd7#
      • 1...Bxb3
        • 2.Se4#
        • 2.Sd7#
      • 1...Bg5
        • 2.Sd7#
      • 1...Bf3
        • 2.Sd7#
      • 1...Bc4
        • 2.Se4#
        • 2.Sd7#
      • 1...e5
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(g);S_FLIGHT::QAB(G)
    • B(c);SBLOCK::S(E)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(g);S_FLIGHT::QAB1(G)
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • Q(G);CHECK
      • Vars
        • K(g);OGATE,S_FLIGHT::QAR2(G)
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • Q(G);
    • Vars
      • B(d);CHECK,N_GUARD::S(E),XB(d)
      • K(g);S_FLIGHT::QAB(G)
      • K(g);S_FLIGHT::S(E)
      • B(d);XS(B)::S(E)
      • B(c);SBLOCK::S(E)
      • B(d);::S(E)
      • P(f);SBLOCK::QAB(G)
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