MESON Chess Problem Database

Problem Display
PID: 68440 (8/8/2R4K/p7/kr3p2/1p6/1p2Q3/1N6 w - - 0 1)

Lewis, Robert Tony

Problem Observer, 2006

8/8/2R4K/p7/kr3p2/1p6/1p2Q3/1N6

#2

4 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Qxc4#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Qe8#
      • 1...Rxc4
        • 2.Qxc4#
      • 1...Kb5!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Rc4#
      • 1...Kb5
        • 2.Sc3#
      • 1...Rc4
        • 2.Rxc4#
      • 1...Rb6
        • 2.Rxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(d);OGATEB::QAR2(B),XR(d)
  • Tries
    • Try
      • R(C);P_PINR(d)
      • Threat
        • QAB(B)
      • Vars
        • R(d);N_SPINR(d),OGATE,XR(C)::QAR2(B),XR(d)
      • Refutation
        • K(c);N_SPINR(d),S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+R(C)
    • Vars
      • K(c);S_FLIGHT::S(A)
      • R(d);::QAB(B)+R(C),DCHECK,XR(d)
      • R(d);N_GUARD,P_PINR(C)::QAB(B)+R(C),XR(d)
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