MESON Chess Problem Database

Problem Display
PID: 7590 (8/7p/Q7/5K1k/R7/8/8/4n1b1 w - - 0 1)

Lincoln, Robert A

The Problemist, 1991

8/7p/Q7/5K1k/R7/8/8/4n1b1

#2

3 + 4

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...h6
      • 2.Qg6#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Rh4#
        • 2.Qh4#
        • 2.Qg5#
      • 1...Bf2
        • 2.Qg5#
      • 1...Be3
        • 2.Rh4#
        • 2.Qh4#
      • 1...Bd4
        • 2.Qg5#
      • 1...Sg2
        • 2.Qg5#
      • 1...h6
        • 2.Rh4#
        • 2.Qh4#
        • 2.Qg6#
        • 2.Qf7#
      • 1...Sf3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qxh7#
      • 1...Kh6
        • 2.Rh4#
      • 1...Be3
        • 2.Qh1#
      • 1...h6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD::QAB1(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • B(b);::QAR1(C)
        • S(a);::QAR1(C)
      • Refutation
        • S(a);
  • Actual
    • Q(C);
    • Threat
      • QAR2(C),XP(d)
    • Vars
      • K(c);P-FLIGHT::R(A)
      • B(b);N_GUARD::QAR(C)
      • P(d);SBLOCK::QAB(C)
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