MESON Chess Problem Database

Problem Display
PID: 7691 (6bn/7n/1Q6/7k/6R1/6K1/8/8 w - - 0 1)

Lincoln, Robert A

The Problemist, 1992

6bn/7n/1Q6/7k/6R1/6K1/8/8

#2

3 + 4

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Rh4#
    • 1...Sg6
      • 2.Qxg6#
    • 1...Sf7
      • 2.Qg6#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Qh1#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sg5
        • 2.Rh4#
      • 1...Bd5!
    • 1.Qf6?
      • threat
        • 2.Rh4#
        • 2.Qh4#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sg5
        • 2.Rh4#
        • 2.Rxg5#
        • 2.Qxg5#
      • 1...Sxf6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qh1#
      • 1...Kh6
        • 2.Qh1#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Bd5
        • 2.Qxh7#
      • 1...Sg5
        • 2.Rh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(b);SBLOCK::R1(B)
    • S(d);N_GUARD::QAB1(C),XS(d)
    • S(d);N_GUARD::QAB1(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • S(d);N_GUARD::QAB1(C),XS(d)
        • S(b);SBLOCK::R1(B)
      • Refutation
        • B(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);N_GUARD::QAB1(C),XS(d)
      • Refutation
        • S(b);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • K(a);P-FLIGHT::QAR(C)
      • S(d);N_GUARD::QAB1(C),XS(d)
      • B(c);N_GUARD::QAR2(C),XS(b)
      • S(b);SBLOCK::R1(B)
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