MESON Chess Problem Database

Problem Display
PID: 180668 (K1k5/bR6/1P6/8/8/8/2r5/2Q5 w - - 0 1)

Lincoln, Robert A

StrateGems, 2017

K1k5/bR6/1P6/8/8/8/2r5/2Q5

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Qxc7#
  • Tries
    • 1.Rc7+?
      • 1...Rxc7
        • 2.Qxc7#
      • 1...Kd8!
    • 1.Qd2?
      • threat
        • 2.Qd7#
      • 1...Rc7
        • 2.Rxc7#
      • 1...Rxd2!
    • 1.Qg5?
      • threat
        • 2.Qg8#
      • 1...Rc7
        • 2.Rxc7#
      • 1...Rd2
        • 2.Rc7#
      • 1...Re2
        • 2.Rc7#
      • 1...Rf2
        • 2.Rc7#
      • 1...Rg2
        • 2.Rc7#
      • 1...Bxb6!
    • 1.Qd1?
      • threat
        • 2.Qd7#
      • 1...Rc7
        • 2.Rxc7#
      • 1...Rd2!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qf8#
      • 1...Kd8
        • 2.Qf8#
      • 1...Bxb6
        • 2.Qb8#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Rd2
        • 2.Qc7#
      • 1...Re2
        • 2.Qc7#
      • 1...Rf2
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE::QAR1(A),XR(a)
  • Tries
    • Try
      • R(C);CHECK,N_PINR(a)
      • Vars
        • R(a);OGATE,P_SPINR(a),XR(C)::QAR1(A),XR(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);N_PINR(a)
      • Threat
        • QAB1(A)
      • Vars
        • R(a);N_GUARD::R1(C),XR(a)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);N_PINR(a)
      • Threat
        • QAR(A)
      • Vars
        • R(a);N_GUARD::R1(C),XR(a)
        • R(a);N_GUARD::R1(C)
      • Refutation
        • B(b);XP(B)
    • Try
      • Q(A);N_PINR(a)
      • Threat
        • QAB1(A)
      • Vars
        • R(a);N_GUARD::R1(C),XR(a)
      • Refutation
        • R(a);
  • Actual
    • Q(A);N_PINR(a)
    • Threat
      • QAR(A)
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
      • B(b);N_GUARD,XP(B)::QAR1(A)
      • R(a);N_GUARD::QAR1(A),XR(a)
      • R(a);N_GUARD::QAR1(A)
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