MESON Chess Problem Database

Problem Display
PID: 167758 (5rkB/8/6P1/8/8/8/R5QK/8 w - - 0 1)

Lincoln, Robert A

2nd Comm., Volchek-50 JT, 2016

5rkB/8/6P1/8/8/8/R5QK/8

#2

5 + 2

145 StrateGems 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Rxa8#
      • 2.Qxa8#
  • Tries
    • 1.Ra8?
      • 1...Rxa8
        • 2.Qxa8#
      • 1...Rb8
        • 2.Rxb8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Rd8
        • 2.Rxd8#
      • 1...Re8
        • 2.Rxe8#
      • 1...Kxh8!
    • 1.Qd5+?
      • 1...Rf7
        • 2.Ra8#
      • 1...Kxh8!
  • Keys
    • 1.Qa8!
      • 1...Kxh8
        • 2.Qxf8#
      • 1...Rxa8
        • 2.Rxa8#
      • 1...Rb8
        • 2.Qxb8#
      • 1...Rc8
        • 2.Qxc8#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Re8
        • 2.Qxe8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);P_PINR(a)
      • Vars
        • R(a);N_SPINR(a),OGATE,XR(A)::QAR(B),XR(a)
        • R(a);OGATEB::R(A),XR(a)
      • Refutation
        • K(b);P-FLIGHT,XB(E)
    • Try
      • Q(B);CHECK
      • Vars
        • R(a);P_SPINR(a)::R(A)
      • Refutation
        • K(b);P-FLIGHT,XB(E)
  • Actual
    • Q(B);P_PINR(a)
    • Vars
      • K(b);P-FLIGHT,XB(E)::QAR2(B),XR(a)
      • R(a);N_SPINR(a),OGATE,XQ(B)::R(A),XR(a)
      • R(a);OGATEB::QAR(B),XR(a)
      • R(a);OGATEB::QAR2(B),XR(a)
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