MESON Chess Problem Database

Problem Display
PID: 234883 (NNbk4/3p2p1/1r1R1p2/r5Q1/8/4R2K/8/4B3 w - - 0 1)

Haring, Jacobus

Il Due Mosse, 1955

NNbk4/3p2p1/1r1R1p2/r5Q1/8/4R2K/8/4B3

#2

7 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sc6#
    • 1...Rb2
      • 2.Sc6#
    • 1...Rb3
      • 2.Sc6#
    • 1...Rb4
      • 2.Sc6#
    • 1...Rb5
      • 2.Sc6#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Rb7
      • 2.Sc6#
    • 1...g6
      • 2.Qxf6#
  • Keys
    • 1.Rxf6!
      • threat
        • 2.Rf8#
      • 1...d5+
        • 2.Rfe6#
      • 1...d6+
        • 2.Rf5#
      • 1...Rxa8
        • 2.Rc6#
      • 1...Rxf6
        • 2.Bxa5#
      • 1...gxf6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • R(b);N_GUARD::S(G)
    • R(b);N_GUARD,P_PINR(B)::S(G)
    • R(b);N_GUARD::S(G),XR(b)
    • P(e);N_GUARD::QAB(D),XP(c)
  • Actual
    • R(E);XP(c)
    • Threat
      • QAB(D)+R(E),DCHECK
    • Vars
      • P(d);CHECK,S_CUTR(a)::QAB(D)+R(E)
      • P(d);CHECK,S_CUTR(b)::QAB(D)+R(E)
      • R(a);N_GUARD,XS(F)::QAB(D)+R(E)
      • R(b);OGATEB,P_SPINR(b),XR(E)::B(A),XR(a)
      • P(e);OGATE,P_SPINP(e),XR(E)::QAR(D)
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