MESON Chess Problem Database

Problem Display
PID: 15627 (1Knk4/1b3R2/8/8/Q7/3r4/8/8 w - - 0 1)

Lincoln, Robert A

Newark Star-Ledger, 1986

1Knk4/1b3R2/8/8/Q7/3r4/8/8

#2

3 + 4

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Qd7#
    • 1...Rb3
      • 2.Qd7#
    • 1...Rc3
      • 2.Qd7#
    • 1...Re3
      • 2.Qd7#
    • 1...Rf3
      • 2.Qd7#
    • 1...Rg3
      • 2.Qd7#
    • 1...Rh3
      • 2.Qd7#
    • 1...Rd7
      • 2.Qxd7#
    • 1...Bd5
      • 2.Qd7#
    • 1...Sd6
      • 2.Qd7#
    • 1...Se7
      • 2.Rf8#
  • Tries
    • 1.Qh4+?
      • 1...Se7
        • 2.Qxe7#
      • 1...Ke8!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qg8#
      • 1...Ke8
        • 2.Qg8#
      • 1...Re3
        • 2.Qd7#
      • 1...Rg3
        • 2.Qd7#
      • 1...Bc6
        • 2.Qxc8#
      • 1...Sd6
        • 2.Qd7#
      • 1...Se7
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::QAR1(A)
    • R(a);N_GUARD::QAR1(A),XR(a)
    • B(b);S_CUTR(a)::QAR1(A)
    • S(c);S_CUTR(a)::QAR1(A)
    • S(c);SBLOCK::R(B)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(A),XS(c)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(d);P-FLIGHT::QAR2(A)
      • R(a);N_GUARD::QAR1(A)
      • B(b);N_GUARD::QAR1(A),XS(c)
      • S(c);S_CUTR(a)::QAR1(A)
      • S(c);SBLOCK::R(B)
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