MESON Chess Problem Database

Problem Display
PID: 207204 (8/7K/1p3B2/7k/4N3/1P3ppP/Q5P1/6nn w - - 0 1)

Meyer, Heinrich Friedrich Ludwig

London, 1868

8/7K/1p3B2/7k/4N3/1P3ppP/Q5P1/6nn

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Sxg3#
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qb5#
        • 2.Qe8#
      • 1...b5
        • 2.Qxb5#
      • 1...Sxh3!
    • 1.Qa5+?
      • 1...b5
        • 2.Qxb5#
      • 1...bxa5!
    • 1.Qa6?
      • threat
        • 2.Qb5#
      • 1...b5
        • 2.Qxb5#
      • 1...Sxh3!
  • Keys
    • 1.Qf2!
      • 1...Sxh3
        • 2.Qxf3#
      • 1...Sxf2
        • 2.Sxg3#
      • 1...fxg2
        • 2.Qf5#
      • 1...gxf2
        • 2.g4#
      • 1...Se2
        • 2.Qxf3#
      • 1...b5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::S(E),XP(d)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::QAR(A),XP(f)
      • Refutation
        • S(a);XP(D)
    • Try
      • Q(A);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAR(A),XP(f)
      • Refutation
        • P(f);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(f);::QAR(A),XP(f)
      • Refutation
        • S(a);XP(D)
  • Actual
    • Q(A);
    • Vars
      • S(a);N_GUARD,XP(D)::QAB(A),XP(c)
      • S(b);N_GUARD,XQ(A)::S(E),XP(d)
      • P(c);OGATE,XP(B)::QAR2(A)
      • P(d);OGATE,XQ(A)::P(B)
      • S(a);N_GUARD::QAB(A),XP(c)
      • P(f);N_GUARD::QAR(A)
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