MESON Chess Problem Database

Problem Display
PID: 139214 (7Q/8/1R6/1ppk3K/q4p2/5n2/1N1n1NB1/8 w - - 0 1)

Ellerman, Arnoldo

3rd HM., Tijdschrift vd NSB, 1924

7Q/8/1R6/1ppk3K/q4p2/5n2/1N1n1NB1/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Bxf3#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Qd4
        • 2.Qa8#
      • 1...Qe4
        • 2.Qd8#
      • 1...Sc4
        • 2.Bxf3#
      • 1...Se4!
    • 1.Qf6?
      • threat
        • 2.Rd6#
        • 2.Qd6#
      • 1...c4
        • 2.Qd6#
      • 1...Qa6
        • 2.Qd6#
      • 1...Sc4
        • 2.Bxf3#
      • 1...Se4!
  • Keys
    • 1.Sfd3!
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Qd4
        • 2.Qa8#
      • 1...Qe4
        • 2.Qd8#
      • 1...Sc4
        • 2.Bxf3#
      • 1...Se4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,S_CUTQ(c)::B(C),XS(b)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(F)
      • Vars
        • K(g);S_FLIGHT::QAR1(F)
        • Q(c);N_GUARD,SBLOCK::QAB(F)
        • Q(c);N_SPINS(b),SBLOCK::QAR(F)
        • S(a);N_GUARD,S_CUTQ(c)::B(C),XS(b)
      • Refutation
        • S(a);N_SPINS(b)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::QAR1(F)
        • Q(c);::QAR1(F)
        • S(a);N_GUARD,S_CUTQ(c)::B(C),XS(b)
      • Refutation
        • S(a);N_SPINS(b)
  • Actual
    • S(B);
    • Threat
      • QAR1(F)
    • Vars
      • K(g);S_FLIGHT::QAR1(F)
      • Q(c);N_GUARD,SBLOCK::QAB(F)
      • Q(c);N_SPINS(b),SBLOCK::QAR(F)
      • S(a);N_GUARD,S_CUTQ(c)::B(C),XS(b)
      • S(a);N_SPINS(b),SBLOCK,S_CUTQ(c)::S(B),XP(d)
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