MESON Chess Problem Database

Problem Display
PID: 182435 (Qnk5/bN6/5N2/1p1p1p2/1PrR2pK/6BB/8/2R5 w - - 0 1)

Phillips-Dannan, Miss A

The Problemist, 1954

Qnk5/bN6/5N2/1p1p1p2/1PrR2pK/6BB/8/2R5

#2

9 + 8

136 Problem Observer 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Rxc6#
    • 1...Rc7
      • 2.Rxc7#
    • 1...Bxd4
      • 2.Qxb8#
    • 1...Bc5
      • 2.Qxb8#
    • 1...Bb6
      • 2.Qxb8#
  • Tries
    • 1.Re1?
      • threat
        • 2.Re8#
      • 1...Bb6
        • 2.Qxb8#
      • 1...f4!
    • 1.Rcxc4+?
      • 1...Bc5
        • 2.Rxc5#
        • 2.Qxb8#
      • 1...dxc4
        • 2.Rd8#
      • 1...bxc4!
  • Keys
    • 1.Rxg4!
      • 1...Rxc1
        • 2.Rg8#
      • 1...fxg4
        • 2.Bxg4#
      • 1...f4
        • 2.Rg7#
      • 1...Rc2
        • 2.Rg8#
      • 1...Rc3
        • 2.Rg8#
      • 1...Rc5
        • 2.Rg8#
      • 1...Rc6
        • 2.Rxc6#
        • 2.Rg8#
      • 1...Rc7
        • 2.Rxc7#
        • 2.Rg8#
      • 1...Bg1
        • 2.Qxb8#
      • 1...Bf2
        • 2.Qxb8#
      • 1...Be3
        • 2.Qxb8#
      • 1...Bd4
        • 2.Rg8#
        • 2.Qxb8#
      • 1...Bc5
        • 2.Qxb8#
      • 1...Bb6
        • 2.Qxb8#
      • 1...d4
        • 2.Rg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 3
  • Sets
    • R(a);OGATE::R(A),XR(a)
    • R(a);OGATE::R1(A),XR(a)
    • B(f);N_GUARD,XR(E)::QAR1(I),XS(g)
    • B(f);N_GUARD,N_SPINR(a)::QAR1(I),XS(g)
    • B(f);N_GUARD::QAR1(I),XS(g)
  • Tries
    • Try
      • R(A);N_PINR(a)
      • Threat
        • R(A)
      • Vars
        • B(f);N_GUARD::QAR1(I),XS(g)
      • Refutation
        • P(e);P_SPINP(b)
    • Try
      • R(A);CHECK,XR(a)
      • Vars
        • P(d);OGATE,XR(A)::R1(E)
      • Refutation
        • P(c);XR(A)
  • Actual
    • R(E);P_SPINR(E),XP(b)
    • Vars
      • R(a);N_PINR(E),N_SPINR(a),XR(A)::R(E)
      • P(e);OGATE,P_SPINP(e),XR(E)::B(C),XP(e)
      • P(e);N_PINR(E)::B(C)+R(E)
      • R(a);N_PINR(E)::R(E)
      • B(f);N_GUARD::QAR1(I),XS(g)
      • B(f);N_GUARD,P_PINB(B)::QAR1(I),XS(g)
      • B(f);N_GUARD,N_SPINR(a)::QAR1(I),XS(g)
      • P(d);N_PINR(E)::R(E)
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