MESON Chess Problem Database

Problem Display
PID: 45261 (7B/2KPPr2/2pRQ3/2Npn2r/PPk1Nb1R/2Pp3q/4P3/8 w - - 0 1)

Groeneveld, Cornelis

van Gool, Johann Christoffel

1st Prize, Knobi's Knobelecke, 1996-1997

7B/2KPPr2/2pRQ3/2Npn2r/PPk1Nb1R/2Pp3q/4P3/8

#2

13 + 9

102 Probleemblad 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.exd3#
    • 1...Sg6
      • 2.Sd2#
    • 1...Sxd7
      • 2.Sd2#
  • Tries
    • 1.exd3+?
      • 1...Sxd3
        • 2.Sd2#
      • 1...Qxd3!
  • Keys
    • 1.Rxd5!
      • threat
        • 2.Rd4#
      • 1...Sf3+
        • 2.Sd6#
      • 1...Sg4+
        • 2.Re5#
      • 1...Sg6+
        • 2.Sd6#
      • 1...Sxd7+
        • 2.Sd6#
      • 1...cxd5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD,P_PINR(H),S_CUTQ(b)::P(A),XP(a)
    • S(f);P_PINR(H)::S(E)
    • S(f);P_PINR(H),XP(K)::S(E)
  • Tries
    • Try
      • P(A);CHECK,XP(a)
      • Vars
        • S(f);P_PINR(H),XP(A)::S(E)
      • Refutation
        • Q(b);XP(A)
  • Actual
    • R(H);XP(e)
    • Threat
      • QAB(I)+R(H),DCHECK
    • Vars
      • S(f);CHECK::S(E)
      • S(f);CHECK,S_CUTQ(b)::QAB(I)+R(H)
      • S(f);CHECK,XP(K)::S(E)
      • P(h);OGATE,P_SPINP(h),SBLOCK,XR(H)::QAB(I)
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