MESON Chess Problem Database

Problem Display
PID: 23090 (7n/6pK/8/7k/5Q2/7B/7n/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

7n/6pK/8/7k/5Q2/7B/7n/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qg4#
    • 1...Sf3
      • 2.Qg4#
    • 1...Sg4
      • 2.Qxg4#
    • 1...g6
      • 2.Qh6#
  • Tries
    • 1.Kxg7?
      • threat
        • 2.Qh6#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Sf7!
  • Keys
    • 1.Bf5!
      • 1...Sg4
        • 2.Qxg4#
      • 1...Sf1
        • 2.Qg4#
      • 1...Sf3
        • 2.Qg4#
      • 1...Sg6
        • 2.Bxg6#
      • 1...Sf7
        • 2.Bg6#
      • 1...g5
        • 2.Qxh2#
      • 1...g6
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
    • P(c);N_GUARD::QAR1(B)
  • Tries
    • Try
      • K(C);P-FLIGHT,XP(c)
      • Threat
        • QAR1(B)
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • S(d);
  • Actual
    • B(A);
    • Vars
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(a);N_GUARD::QAB1(B)
      • S(d);N_GUARD::B(A),XS(d)
      • S(d);N_GUARD::B(A)
      • P(c);SBLOCK::QAR(B),XS(a)
      • P(c);N_GUARD::QAR1(B)
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