MESON Chess Problem Database

Problem Display
PID: 71519 (1B6/1p5K/pkr5/p7/P2P4/8/1p4BQ/7R w - - 0 1)

Ling, John Francis

Problem Observer, 2007

1B6/1p5K/pkr5/p7/P2P4/8/1p4BQ/7R

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Qxd6#
    • 1...Re6
      • 2.Qc7#
    • 1...Rf6
      • 2.Qc7#
    • 1...Rg6
      • 2.Qc7#
    • 1...Rh6+
      • 2.Qxh6#
    • 1...Rc7+
      • 2.Qxc7#
    • 1...b1Q+
      • 2.Rxb1#
    • 1...b1S
      • 2.Rxb1#
    • 1...b1B+
      • 2.Rxb1#
    • 1...b1R
      • 2.Rxb1#
  • Tries
    • 1.Qd6?
      • 1...b1Q+
        • 2.Rxb1#
      • 1...b1B+
        • 2.Rxb1#
      • 1...b1S
        • 2.Rxb1#
      • 1...b1R
        • 2.Rxb1#
      • 1...Rxd6!
  • Keys
    • 1.Qh6!
      • 1...Rxh6+
        • 2.Rxh6#
      • 1...b1Q+
        • 2.Rxb1#
      • 1...b1B+
        • 2.Rxb1#
      • 1...b1S
        • 2.Rxb1#
      • 1...b1R
        • 2.Rxb1#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Re6
        • 2.Qxe6#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rg6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(e);OGATEB::QAR2(C),XR(e)
    • R(e);N_GUARD::QAB1(C)
    • R(e);CHECK,OGATEB::QAR(C),XR(e)
    • R(e);CHECK,N_GUARD::QAB1(C),XR(e)
    • P(a);CHECK,OGATEB::R(A),XQ(a)
    • P(a);OGATEB::R(A),XS(a)
    • P(a);CHECK,OGATEB::R(A),XB(a)
    • P(a);OGATEB::R(A),XR(a)
  • Tries
    • Try
      • Q(C);P_PINR(e)
      • Vars
        • P(a);CHECK,OGATEB::R(A),XQ(a)
        • P(a);CHECK,OGATEB::R(A),XB(a)
        • P(a);OGATEB::R(A),XS(a)
        • P(a);OGATEB::R(A),XR(a)
      • Refutation
        • R(e);N_SPINR(e),XQ(C)
  • Actual
    • Q(C);P_PINR(e)
    • Vars
      • R(e);CHECK,N_SPINR(e),OGATE,XQ(C)::R(A),XR(e)
      • P(a);CHECK,OGATEB::R(A),XQ(a)
      • P(a);CHECK,OGATEB::R(A),XB(a)
      • P(a);OGATEB::R(A),XS(a)
      • P(a);OGATEB::R(A),XR(a)
      • R(e);OGATEB::QAR2(C),XR(e)
      • R(e);OGATEB::QAR(C),XR(e)
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