MESON Chess Problem Database

Problem Display
PID: 228288 (8/1N1r2p1/6K1/5R2/4kB2/1nQ3p1/5b2/5r2 w - - 0 1)

Lincoln, Robert A

US Problem Bulletin, 1986

8/1N1r2p1/6K1/5R2/4kB2/1nQ3p1/5b2/5r2

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6+
      • 2.Sxd6#
    • 1...Rc7
      • 2.Sd6#
    • 1...Re7
      • 2.Sd6#
    • 1...Rf7
      • 2.Sd6#
    • 1...Be1
      • 2.Qe3#
    • 1...Be3
      • 2.Qxe3#
    • 1...Sd4
      • 2.Sc5#
  • Tries
    • 1.Bh6?
      • threat
        • 2.Re5#
      • 1...Rd6+
        • 2.Sxd6#
      • 1...Rd3
        • 2.Qe5#
      • 1...Rd4
        • 2.Qf3#
      • 1...Rd5
        • 2.Rf4#
      • 1...Re7
        • 2.Sd6#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bd4
        • 2.Qc2#
      • 1...Sd4
        • 2.Sc5#
      • 1...gxh6!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Re5#
      • 1...Rd6+
        • 2.Sxd6#
      • 1...Rd3
        • 2.Qe5#
      • 1...Rd4
        • 2.Qf3#
      • 1...Rd5
        • 2.Rf4#
      • 1...Re7
        • 2.Sd6#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bd4
        • 2.Qc2#
      • 1...Sd4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(f);CHECK,N_GUARD::S(E),XR(f)
    • R(f);N_GUARD::S(E)
    • B(b);N_GUARD::QAR1(A)
    • B(b);N_GUARD::QAR1(A),XB(b)
    • S(c);N_GUARD,S_CUTB(b)::S(E)
  • Tries
    • Try
      • B(B);
      • Threat
        • R1(C)
      • Vars
        • R(f);CHECK,N_GUARD::S(E),XR(f)
        • R(f);SBLOCK::QAR1(A)
        • R(f);SBLOCK::QAB1(A)
        • R(f);SBLOCK::R1(C)
        • R(f);N_GUARD::S(E)
        • B(b);N_GUARD::QAR1(A),XB(b)
        • B(b);SBLOCK,S_CUTR(f)::QAB(A)
        • S(c);N_GUARD,S_CUTB(b)::S(E)
      • Refutation
        • P(g);XB(B)
  • Actual
    • B(B);
    • Threat
      • R1(C)
    • Vars
      • R(f);CHECK,N_GUARD::S(E),XR(f)
      • R(f);SBLOCK::QAR1(A)
      • R(f);SBLOCK::QAB1(A)
      • R(f);SBLOCK::R1(C)
      • R(f);N_GUARD::S(E)
      • B(b);N_GUARD::QAR1(A),XB(b)
      • B(b);SBLOCK,S_CUTR(f)::QAB(A)
      • S(c);N_GUARD,S_CUTB(b)::S(E)
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