MESON Chess Problem Database

Problem Display
PID: 51867 (rk1B4/p7/Bq6/P4pK1/6p1/4n3/6p1/1Q5R w - - 0 1)

Barnes, Barry Peter

Morse, Christopher Jeremy

The Problemist, 2004

(First published on Thu Jan 1 2004)

rk1B4/p7/Bq6/P4pK1/6p1/4n3/6p1/1Q5R

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb1
      • 2.Rxb1#
    • 1...Qb2
      • 2.Qxb2#
    • 1...Qb3
      • 2.Qxb3#
    • 1...Qb4
      • 2.Qxb4#
    • 1...Qb5
      • 2.Qxb5#
    • 1...Qb7
      • 2.Qxb7#
  • Tries
    • 1.Rh7?
      • threat
        • 2.Bc7#
      • 1...Qb7
        • 2.Qxb7#
      • 1...Sd5!
    • 1.axb6?
      • threat
        • 2.Bc7#
      • 1...axb6
        • 2.Qxb6#
      • 1...Sd5!
  • Keys
    • 1.Rh8!
      • threat
        • 2.Bxb6#
      • 1...Qxb1
        • 2.Bb6#
      • 1...Qb7
        • 2.Qxb7#
      • 1...Qb2
        • 2.Qxb2#
      • 1...Qb3
        • 2.Qxb3#
      • 1...Qb4
        • 2.Qxb4#
      • 1...Qb5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(e);N_SPINQ(e),OGATE,XQ(A)::R(B),XQ(e)
    • Q(e);OGATEB::QAR(A),XQ(e)
    • Q(e);OGATE::QAR1(A),XQ(e)
  • Tries
    • Try
      • R(B);
      • Threat
        • B(F)
      • Vars
        • Q(e);OGATE::QAR1(A),XQ(e)
      • Refutation
        • S(b);
    • Try
      • P(C);XQ(e)
      • Threat
        • B(F)
      • Vars
        • P(f);OGATE,P_SPINP(f),XP(C)::QAR2(A),XP(f)
      • Refutation
        • S(b);
  • Actual
    • R(B);
    • Threat
      • R(B)+B(F),XQ(e)
    • Vars
      • Q(e);N_SPINQ(e),XQ(A)::R(B)+B(F)
      • Q(e);OGATE::QAR1(A),XQ(e)
      • Q(e);OGATEB::QAR(A),XQ(e)
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