MESON Chess Problem Database

Problem Display
PID: 121276 (2r5/4PK2/1p1kB3/1PR5/P7/Qn2P3/8/8 w - - 0 1)

van Dijk, Johannes

La Strategie, 1900

2r5/4PK2/1p1kB3/1PR5/P7/Qn2P3/8/8

#2

8 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.e8S#
    • 1...Rc7
      • 2.Rd5#
    • 1...Rd8
      • 2.exd8Q#
      • 2.exd8R#
    • 1...Rf8+
      • 2.exf8Q#
      • 2.exf8B#
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qe5#
      • 1...Rf8+
        • 2.exf8Q#
        • 2.exf8B#
      • 1...Kxc5
        • 2.Qa3#
      • 1...Rxc5
        • 2.e8S#
      • 1...Sxc5
        • 2.Qh2#
      • 1...bxc5
        • 2.Qh2#
      • 1...Sd4
        • 2.Qxd4#

There are these versions: 9400

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(d);N_GUARD::P=S
    • R(d);P_PINP(G),SBLOCK::QAB(A)+R(E),DCHECK
    • R(d);OGATE::PXR(d)=Q
    • R(d);CHECK,OGATE::PXR(d)=Q
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(d);CHECK,OGATE::PXR(d)=Q
      • K(c);OGATEB,S_FLIGHT,XR(E)::QAB(A)
      • R(d);N_GUARD,SBLOCK,XR(E)::P=S
      • S(a);SBLOCK,XR(E)::QAB(A)
      • P(b);SBLOCK,XR(E)::QAB(A)
      • S(a);N_GUARD::QAR2(A),XS(a)
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