MESON Chess Problem Database

Problem Display
PID: 15847 (8/3Q3K/8/1r5k/7B/6P1/7n/8 w - - 0 1)

Lincoln, Robert A

Newark Star-Ledger, 1988

8/3Q3K/8/1r5k/7B/6P1/7n/8

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qf5#
    • 1...Rb2
      • 2.Qf5#
    • 1...Rb3
      • 2.Qf5#
    • 1...Rb4
      • 2.Qf5#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rb6
      • 2.Qf5#
    • 1...Rb8
      • 2.Qf5#
    • 1...Sf1
      • 2.Qd1#
    • 1...Sg4
      • 2.Qe8#
      • 2.Qf7#
  • Tries
    • 1.Bf6?
      • threat
        • 2.Qh3#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Rb4
        • 2.Qf5#
      • 1...Sf3
        • 2.g4#
      • 1...Sg4
        • 2.Qe8#
        • 2.Qf7#
      • 1...Rb7!
    • 1.Bd8?
      • threat
        • 2.Qh3#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Rb4
        • 2.Qf5#
      • 1...Sf3
        • 2.g4#
      • 1...Sg4
        • 2.Qe8#
        • 2.Qf7#
      • 1...Rb7!
    • 1.Qh3?
      • threat
        • 2.Bf6#
        • 2.Be7#
        • 2.Bd8#
      • 1...Rb7+
        • 2.Be7#
      • 1...Rb4
        • 2.Qf5#
      • 1...Sf3
        • 2.g4#
      • 1...Rg5!
    • 1.Qd1+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sg4!
    • 1.Qg7?
      • threat
        • 2.Qg6#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Rb6
        • 2.Qg5#
      • 1...Rb7!
  • Keys
    • 1.Be7!
      • threat
        • 2.Qh3#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Rb4
        • 2.Qf5#
      • 1...Sf3
        • 2.g4#
      • 1...Sg4
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::QAR2(C)
    • R(b);N_GUARD::QAR2(C),XR(b)
    • S(a);N_GUARD::QAB(C)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR2(C)
      • Vars
        • R(b);N_GUARD::QAR2(C),XR(b)
        • R(b);N_GUARD::QAR2(C)
        • S(a);N_GUARD::P(A)
      • Refutation
        • R(b);P_PINQ(C)
    • Try
      • B(B);
      • Threat
        • QAR2(C)
      • Vars
        • R(b);N_GUARD::QAR2(C),XR(b)
        • R(b);N_GUARD::QAR2(C)
        • S(a);N_GUARD::P(A)
      • Refutation
        • R(b);P_PINQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(b);CHECK::QAR(C)+B(B)
        • R(b);N_GUARD::QAR2(C)
        • S(a);N_GUARD::P(A)
      • Refutation
        • R(b);
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(C),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • R(b);N_GUARD::QAR1(C),XR(b)
        • R(b);N_GUARD::QAR1(C)
      • Refutation
        • R(b);P_PINQ(C)
  • Actual
    • B(B);
    • Threat
      • QAR2(C)
    • Vars
      • R(b);N_GUARD::QAR2(C),XR(b)
      • R(b);N_GUARD::QAR2(C)
      • S(a);N_GUARD::P(A)
      • S(a);SBLOCK::QAB(C)
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