MESON Chess Problem Database

Problem Display
PID: 23203 (4r2k/3b3N/6QK/7n/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

4r2k/3b3N/6QK/7n/8/8/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.Qxe8#
    • 1...Bg4
      • 2.Qxe8#
    • 1...Bf5
      • 2.Qxe8#
    • 1...Bc8
      • 2.Qxe8#
    • 1...Sg3
      • 2.Qg7#
    • 1...Sf4
      • 2.Qg7#
    • 1...Sf6
      • 2.Qg7#
    • 1...Sg7
      • 2.Qxg7#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sf7#
        • 2.Qh7#
      • 1...Sg7
        • 2.Qh7#
        • 2.Qxg7#
      • 1...Re6
        • 2.Sf7#
      • 1...Rf8
        • 2.Qh7#
      • 1...Bf5
        • 2.Sf7#
        • 2.Qxe8#
      • 1...Be6
        • 2.Qh7#
      • 1...Sf6
        • 2.Sf7#
        • 2.Qg7#
      • 1...Re7!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qh7#
      • 1...Sxf6
        • 2.Qg7#
      • 1...Re7
        • 2.Qg8#
      • 1...Bf5
        • 2.Qxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • B(b);N_GUARD::QAR(A),XR(c)
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);P_PINQ(A)::S(C)
        • R(c);::QAR1(A)
        • B(b);::QAR1(A)
      • Refutation
        • R(c);
  • Actual
    • S(C);
    • Threat
      • QAR1(A)
    • Vars
      • S(a);N_GUARD,XS(C)::QAB1(A)
      • R(c);N_GUARD::QAR1(A)
      • B(b);N_GUARD::QAR(A),XR(c)
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