MESON Chess Problem Database

Problem Display
PID: 251650 (5rr1/2p2n2/p2b4/3NQ3/Kpp1N1n1/4P3/2P1kpP1/1R2q1R1 w - - 0 1)

Eerkes, Allard Pieter

Probleemblad, 1982

5rr1/2p2n2/p2b4/3NQ3/Kpp1N1n1/4P3/2P1kpP1/1R2q1R1

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Sg3#
    • 1...Sxe3
      • 2.Sf4#
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qxc4#
      • 1...Sxe3
        • 2.Qxe3#
      • 1...Qd2
        • 2.Qxd2#
      • 1...Qc3
        • 2.Qd1#
      • 1...Qd1
        • 2.Qxd1#
      • 1...Sge5
        • 2.Sf4#
      • 1...Sfe5
        • 2.Sg3#
      • 1...c3
        • 2.Qd3#
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(a);SBLOCK::S(G)
    • S(f);SBLOCK,XP(E)::S(H)
  • Actual
    • Q(I);
    • Threat
      • QAB(I),XP(e)
    • Vars
      • S(f);OGATE,XP(E)::QAR1(I),XS(f)
      • Q(a);N_GUARD::QAR1(I),XQ(a)
      • Q(a);N_GUARD::QAB1(I)
      • Q(a);N_GUARD,P_PINP(C)::QAB1(I),XQ(a)
      • S(f);S_CUTB(h)::S(H)
      • S(j);S_CUTB(h)::S(G)
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