MESON Chess Problem Database

Problem Display
PID: 23876 (5b2/6pK/7N/4n2k/8/6Q1/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

5b2/6pK/7N/4n2k/8/6Q1/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Qg4#
    • 1...Sf3
      • 2.Qg4#
    • 1...Sc4
      • 2.Qg4#
    • 1...Sg4
      • 2.Qxg4#
    • 1...Sc6
      • 2.Qg4#
    • 1...Sg6
      • 2.Qg4#
    • 1...Sd7
      • 2.Qg4#
    • 1...Sf7
      • 2.Qg4#
    • 1...g5
      • 2.Qh2#
      • 2.Qh3#
  • Tries
    • 1.Qxe5+?
      • 1...g5
        • 2.Qh2#
      • 1...Kh4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qh4#
      • 1...Be7
        • 2.Sxg7#
      • 1...Sf3
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...g5
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
  • Tries
    • Try
      • Q(A);CHECK,XS(a)
      • Vars
        • P(c);P_SPINP(c),SBLOCK::QAR(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • B(d);N_GUARD::S(B),XP(c)
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • P(c);SBLOCK::QAR2(A)
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