MESON Chess Problem Database

Problem Display
PID: 51590 (1R4Q1/1p1K4/RPBP4/1pkppp2/4b3/2PP4/8/8 w - - 0 1)

Morse, Christopher Jeremy

The Guardian, 1966

1R4Q1/1p1K4/RPBP4/1pkppp2/4b3/2PP4/8/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd3
      • 2.Qxd5#
  • Tries
    • 1.Rc8?
      • threat
        • 2.Bxd5#
        • 2.Bxb7#
      • 1...bxc6
        • 2.Rxc6#
      • 1...b4
        • 2.Ba4#
      • 1...d4
        • 2.Bxe4#
        • 2.Bd5#
      • 1...bxa6!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Bxb7#
      • 1...bxa6
        • 2.Ba8#
      • 1...bxc6
        • 2.Qxc6#
      • 1...d4
        • 2.Bxe4#
      • 1...b4
        • 2.Ba4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD,XP(B)::QAR1(I),XP(d)
  • Tries
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);OGATE,P_SPINP(g),XB(E)::R1(H),XP(g)
        • P(b);OGATE::R(H)+B(E)
      • Refutation
        • P(g);XR(C)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)+B(E),XP(g)
    • Vars
      • P(g);OGATE,XR(C)::QAR(I)+B(E)
      • P(g);OGATE,P_SPINP(g),XB(E)::QAR1(I),XP(g)
      • P(d);OGATE::QAR(I)+B(E),XB(a)
      • P(b);OGATE::QAR(I)+B(E)
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