MESON Chess Problem Database

Problem Display
PID: 7787 (7n/8/8/5p1k/Q4B2/5K2/6R1/8 w - - 0 1)

Lincoln, Robert A

The Problemist, 1993

7n/8/8/5p1k/Q4B2/5K2/6R1/8

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Rh2#
  • Tries
    • 1.Rg7?
      • 1...Kh4
        • 2.Rh7#
      • 1...Sg6
        • 2.Rh7#
      • 1...Sf7!
    • 1.Qc6?
      • threat
        • 2.Rh2#
        • 2.Qh6#
      • 1...Kh4
        • 2.Rh2#
        • 2.Qh6#
      • 1...Sf7
        • 2.Rh2#
      • 1...Sg6!
    • 1.Qd7?
      • threat
        • 2.Qh7#
      • 1...Kh4
        • 2.Rh2#
        • 2.Qh7#
      • 1...Sf7!
    • 1.Qe8+?
      • 1...Kh4
        • 2.Rh2#
        • 2.Qxh8#
      • 1...Sg6
        • 2.Rh2#
      • 1...Sf7!
    • 1.Qa1?
      • threat
        • 2.Qxh8#
        • 2.Qh1#
      • 1...Kh4
        • 2.Rh2#
        • 2.Qxh8#
        • 2.Qh1#
      • 1...Sf7
        • 2.Qh1#
      • 1...Sg6!
    • 1.Qa6?
      • threat
        • 2.Rh2#
        • 2.Qh6#
      • 1...Kh4
        • 2.Rh2#
        • 2.Qh6#
      • 1...Sf7
        • 2.Rh2#
      • 1...Sg6!
    • 1.Qa7?
      • threat
        • 2.Qh7#
      • 1...Kh4
        • 2.Rh2#
        • 2.Qh7#
      • 1...Sf7!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qh1#
      • 1...Kh4
        • 2.Rh2#
        • 2.Qh1#
      • 1...Sg6
        • 2.Kg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::R(A)
  • Tries
    • Try
      • R(A);
      • Vars
        • K(b);P-FLIGHT::R(A)
        • S(c);SBLOCK::R(A)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::R(A)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Refutation
        • S(c);
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);P_SPINS(c)::R(A)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::QAR(C)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::R(A)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Refutation
        • S(c);
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • S(c);SBLOCK::QAB(C)+K(B)
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