MESON Chess Problem Database

Problem Display
PID: 23941 (r3k2r/8/2n1KP2/8/B7/4Q3/8/1R6 w qk - 0 1)

Friedgood, David F

Shire, David J

1st Prize, Kingston, 1997

r3k2r/8/2n1KP2/8/B7/4Q3/8/1R6

#2

5 + 4

5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Rb8#
    • 1...Ra6
      • 2.Rb8#
    • 1...Ra7
      • 2.Rb8#
    • 1...Rb8
      • 2.Rxb8#
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qe7#
        • 2.Qxa8#
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8
        • 2.Qf7#
      • 1...0-0
        • 2.Qg7#
      • 1...0-0-0
        • 2.Qb7#
      • 1...Rxa7
        • 2.Rb8#
      • 1...Rb8
        • 2.Rxb8#
        • 2.Qxb8#
        • 2.Qe7#
      • 1...Rc8
        • 2.Qe7#
      • 1...Rd8
        • 2.Qe7#
        • 2.Qf7#
      • 1...Rh7
        • 2.Qxa8#

Anticipated by 11680(1970)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::R(A)
    • R(b);N_GUARD::R(A),XR(b)
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);N_SPINS(a),P-FLIGHT::QAR1(B)
      • K(c);0-0,N_SPINS(a),OGATEB::QAR1(B)
      • K(c);0-0-0,N_SPINS(a),OGATEB::QAB1(B)
      • R(b);N_GUARD,XQ(B)::R(A)
      • R(b);::QAR1(B)
      • R(d);::QAR(B),XR(b)
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