MESON Chess Problem Database

Problem Display
PID: 187665 (6R1/7k/8/3P4/2R1K3/2rp4/8/Q7 w - - 0 1)

White, Alain Campbell

British Chess Magazine, 1909

6R1/7k/8/3P4/2R1K3/2rp4/8/Q7

#2

5 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kh6
      • 2.Qh1#
    • 1...Rc1
      • 2.Qg7#
      • 2.Qh8#
    • 1...Rc2
      • 2.Qg7#
      • 2.Qh8#
    • 1...Ra3
      • 2.Qg7#
      • 2.Qh8#
    • 1...Rb3
      • 2.Qg7#
      • 2.Qh8#
  • Tries
    • 1.Rg3?
      • threat
        • 2.Qh1#
      • 1...Kh6
        • 2.Qh1#
      • 1...Kh8
        • 2.Qh1#
      • 1...Rc1
        • 2.Qg7#
      • 1...Rc2
        • 2.Qg7#
      • 1...Rxc4+!
    • 1.Qxc3?
      • threat
        • 2.Qg7#
        • 2.Qh8#
      • 1...Kh6
        • 2.Qh8#
      • 1...Kxg8!
    • 1.Qg1?
      • threat
        • 2.Qg6#
        • 2.Qg7#
      • 1...Kh6
        • 2.Rh8#
        • 2.Qh2#
        • 2.Qh1#
        • 2.Qg6#
      • 1...Rxc4+!
  • Keys
    • 1.Rc7+!
      • 1...Kh6
        • 2.Qh1#
      • 1...Kxg8
        • 2.Qa8#
      • 1...Rxc7
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR(A)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAR(A)
      • Vars
        • K(c);P-FLIGHT::QAR(A)
        • K(c);P-FLIGHT,P_SPINR(a)::QAB(A)
        • R(a);OGATE::QAR1(A)
      • Refutation
        • R(a);CHECK,XR(B)
    • Try
      • Q(A);XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • K(c);S_FLIGHT,XR(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • R(a);CHECK,XR(B)
  • Actual
    • R(B);CHECK
    • Vars
      • K(c);P-FLIGHT::QAR(A)
      • K(c);S_FLIGHT,XR(E)::QAR(A)
      • R(a);OGATE,XR(B)::QAR1(A)
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