MESON Chess Problem Database

Problem Display
PID: 258039 (8/2Q1R1N1/3n2Pp/4n2K/Rr3kp1/6p1/b2P2B1/8 w - - 0 1)

Drese, Gerardus Hendrikus

Probleemblad, 1948

8/2Q1R1N1/3n2Pp/4n2K/Rr3kp1/6p1/b2P2B1/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sec4
      • 2.Re4#
    • 1...Sdc4
      • 2.Rf7#
    • 1...Se4
      • 2.Qxe5#
    • 1...Sb5
      • 2.Qxe5#
    • 1...Sf5
      • 2.Qxe5#
    • 1...Sb7
      • 2.Qxe5#
    • 1...Sc8
      • 2.Qxe5#
    • 1...Se8
      • 2.Qxe5#
  • Tries
    • 1.Rxb4+?
      • 1...Sec4
        • 2.Re4#
        • 2.Qxd6#
      • 1...Sdc4
        • 2.Rf7#
        • 2.Qxe5#
      • 1...Se4
        • 2.Rxe4#
        • 2.Qxe5#
      • 1...Bc4!
    • 1.Qxd6?
      • threat
        • 2.Qxe5#
        • 2.Qf6#
      • 1...Bb1
        • 2.Qxe5#
      • 1...Be6!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qe3#
        • 2.Qxe5#
      • 1...Sxg6
        • 2.Qe3#
      • 1...Rd4
        • 2.Qxe5#
      • 1...Bd5
        • 2.Qe3#
      • 1...Be6
        • 2.Qe3#
      • 1...Sd3
        • 2.Qe3#
      • 1...Sf3
        • 2.Qe3#
      • 1...Sec4
        • 2.Se6#
      • 1...Sc6
        • 2.Qe3#
      • 1...Sd7
        • 2.Qe3#
      • 1...Sef7
        • 2.Qe3#
      • 1...Sdc4
        • 2.Qd4#
      • 1...Sf5
        • 2.Qxe5#
      • 1...Sdf7
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 10
    • REMOVED MATES = 5
  • Sets
    • S(f);N_SPINR(c),OGATE,P_SPINS(g)::R1(G)
    • S(g);N_GUARD,N_SPINR(c),P_SPINS(f),S_CUTB(a)::R(G)
    • S(g);N_SPINR(c),OGATE,P_SPINS(f)::QAB1(F),XS(f)
    • S(g);OGATE,P_SPINS(f)::QAB1(F),XS(f)
  • Tries
    • Try
      • R(C);CHECK,XR(c)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(F);P_PINS(f),XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(F),XS(f)
      • Refutation
        • B(a);
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • S(f);XP(E)::QAB1(F)
      • R(c);::QAB1(F),XS(f)
      • B(a);::QAB1(F)
      • S(f);::QAB1(F)
      • S(f);N_SPINR(c),S_CUTB(a)::S(H)
      • S(g);N_GUARD,N_SPINR(c),S_CUTR(c)::QAR2(F)
      • S(g);::QAB1(F),XS(f)
      • S(g);::QAB1(F)
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