MESON Chess Problem Database

Problem Display
PID: 135754 (4N3/6pK/2N1P3/3B1k2/n1p5/q2pBPRn/1b5p/7Q w - - 0 1)

Ancin, Andrej

Probleemblad, 1965

4N3/6pK/2N1P3/3B1k2/n1p5/q2pBPRn/1b5p/7Q

#2

9 + 9

14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Rg5#
    • 1...Sf2
      • 2.Rg5#
    • 1...Sg5+
      • 2.Rxg5#
  • Tries
    • 1.Sd6+?
      • 1...Kf6
        • 2.Rg6#
      • 1...Qxd6!
    • 1.Sxg7+?
      • 1...Kf6
        • 2.Rg6#
      • 1...Bxg7!
    • 1.Rg6?
      • threat
        • 2.Be4#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Sf2
        • 2.Rg5#
      • 1...Sc3
        • 2.Sxg7#
      • 1...Sc5
        • 2.Sd6#
      • 1...Bf6!
  • Keys
    • 1.f4!
      • threat
        • 2.Qe4#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Sf2
        • 2.Rg5#
      • 1...Sc3
        • 2.Sd4#
      • 1...Sc5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(e);N_GUARD::R1(D)
    • S(e);CHECK,N_GUARD::R1(D),XS(e)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(h);P-FLIGHT::R1(D)
      • Refutation
        • Q(c);XS(I)
    • Try
      • S(I);CHECK,XP(i)
      • Vars
        • K(h);P-FLIGHT::R1(D)
      • Refutation
        • B(a);XS(I)
    • Try
      • R(D);
      • Threat
        • B(E)
      • Vars
        • S(e);CHECK,N_GUARD::R1(D),XS(e)
        • S(e);N_GUARD::R1(D)
        • S(f);S_CUTB(a)::S(I),XP(i)
        • S(f);S_CUTQ(c)::S(I)
      • Refutation
        • B(a);
  • Actual
    • P(C);
    • Threat
      • QAB1(A)
    • Vars
      • S(e);CHECK,N_GUARD::R1(D),XS(e)
      • S(e);N_GUARD::R1(D)
      • S(f);S_CUTB(a)::S(F)
      • S(f);S_CUTQ(c)::S(F)
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