MESON Chess Problem Database

Problem Display
PID: 159704 (2rk2q1/1RpNR2b/4P3/p5B1/K3p3/8/8/8 w - - 0 1)

Anonymous

BCPJ (June), 1919

2rk2q1/1RpNR2b/4P3/p5B1/K3p3/8/8/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8
      • 2.Rxb8#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sc6#
      • 1...Qe8+
        • 2.Rd7#
      • 1...Qxe6
        • 2.Rxe6#
      • 1...Rb8
        • 2.Rxb8#
      • 1...c5
        • 2.Rbd7#
      • 1...c6
        • 2.Rbd7#
      • 1...Ra8!
  • Keys
    • 1.Sb8!
      • threat
        • 2.Sc6#
      • 1...Qe8+
        • 2.Rd7#
      • 1...Qxe6
        • 2.Rxe6#
      • 1...Rxb8
        • 2.Rxb8#
      • 1...c5
        • 2.Rbd7#
      • 1...c6
        • 2.Rbd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(e);OGATEB::R(D),XR(e)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • Q(g);CHECK,SBLOCK::B(B)+R(F),DCHECK
        • Q(g);OGATE,XP(C)::B(B)+R(F),XQ(g)
        • R(e);OGATEB::R(D),XR(e)
        • P(c);OGATE::R1(D)
      • Refutation
        • R(e);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • Q(g);CHECK,SBLOCK::B(B)+R(F),DCHECK
      • Q(g);OGATE,XP(C)::B(B)+R(F),XQ(g)
      • R(e);OGATE,XS(E)::R(D),XR(e)
      • P(c);OGATE::R1(D)
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