MESON Chess Problem Database

Problem Display
PID: 23263 (R5N1/p6k/2B3p1/1P2B3/r7/Rb5p/4Q2K/8 w - - 0 1)

Barnes, Barry Peter

Quack, Godfrey C

The Problemist, 1997

R5N1/p6k/2B3p1/1P2B3/r7/Rb5p/4Q2K/8

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.R3xa7#
    • 1...Bc4
      • 2.Rxh3#
    • 1...g5
      • 2.Qh5#
  • Tries
    • 1.Be4?
      • threat
        • 2.Qh5#
      • 1...Bd1
        • 2.Rxh3#
      • 1...Rxe4!
  • Keys
    • 1.Qc4!
      • 1...Rxa3
        • 2.Qh4#
      • 1...Rxc4
        • 2.R3xa7#
      • 1...Bxc4
        • 2.Rxh3#
      • 1...g5
        • 2.Be4#
      • 1...Rb4
        • 2.R3xa7#
        • 2.R8xa7#
      • 1...Ra5
        • 2.Qh4#
      • 1...Ra6
        • 2.Qh4#
      • 1...Bd1
        • 2.Qf7#
      • 1...Ba2
        • 2.Rxh3#
      • 1...Bc2
        • 2.Rxh3#
        • 2.Qf7#
      • 1...a5
        • 2.Ra7#
      • 1...a6
        • 2.Ra7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE::R(C),XP(e)
    • B(a);OGATE::R(C),XP(b)
    • P(d);N_GUARD::QAR2(A)
  • Tries
    • Try
      • B(F);P_PINP(d)
      • Threat
        • QAR2(A)
      • Vars
        • B(a);OGATE::R(C),XP(b)
      • Refutation
        • R(c);N_SPINP(d),XB(F)
  • Actual
    • Q(A);
    • Vars
      • R(c);N_GUARD,XR(C)::QAR(A)
      • R(c);OGATE,XQ(A)::R(C),XP(e)
      • B(a);OGATE,XQ(A)::R(C),XP(b)
      • P(d);OGATEB::B(F)
      • R(c);N_GUARD::QAR(A)
      • B(a);N_GUARD::QAR2(A)
      • B(a);OGATE::R(C),XP(b)
      • P(e);S_CUTR(c)::R(G)
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