MESON Chess Problem Database

Problem Display
PID: 148309 (k7/1q1N4/2RN3K/r2B4/8/8/8/8 w - - 0 1)

Stritecky Blazej

Besedy lidu, 1902

k7/1q1N4/2RN3K/r2B4/8/8/8/8

#2

5 + 3

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Rxa6#
    • 1...Qc8
      • 2.Ra6#
    • 1...Qb1
      • 2.Ra6#
    • 1...Qb2
      • 2.Ra6#
    • 1...Qb3
      • 2.Ra6#
    • 1...Qb4
      • 2.Ra6#
    • 1...Qb5
      • 2.Ra6#
    • 1...Qa7
      • 2.Rc8#
    • 1...Qc7
      • 2.Ra6#
    • 1...Qb8
      • 2.Ra6#
    • 1...Rb5
      • 2.Ra6#
    • 1...Rc5
      • 2.Ra6#
    • 1...Ra6
      • 2.Rxa6#
    • 1...Ra7
      • 2.Rc8#
  • Keys
    • 1.Sb5!
      • threat
        • 2.Rc8#
      • 1...Qxc6+
        • 2.Bxc6#
      • 1...Qxb5
        • 2.Ra6#
      • 1...Rxb5
        • 2.Ra6#
      • 1...Qa6
        • 2.Rxa6#
      • 1...Qc8
        • 2.Ra6#
        • 2.Rxc8#
      • 1...Qb6
        • 2.Rxb6#
      • 1...Qc7
        • 2.Ra6#
        • 2.Rxc7#
      • 1...Ra6
        • 2.Rxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(b);::B(A)+R(B),DCHECK,XQ(b)
    • Q(b);::B(A)+R(B),DCHECK
    • Q(b);SBLOCK::B(A)+R(B),DCHECK
    • R(a);N_GUARD::R(B)
    • R(a);N_GUARD::R(B),XR(a)
    • R(a);SBLOCK::R(B)
  • Actual
    • S(C);
    • Threat
      • R(B)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XR(B)::B(A),XQ(b)
      • Q(b);XS(C)::B(A)+R(B),DCHECK
      • R(a);N_GUARD,XS(C)::R(B)
      • Q(b);P_PINR(B)::B(A)+R(B),DCHECK,XQ(b)
      • Q(b);OGATEB,P_PINR(B)::B(A)+R(B),XQ(b)
      • R(a);N_GUARD,P_PINR(B)::R(B),XR(a)
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