MESON Chess Problem Database

Problem Display
PID: 135755 (3nR3/2N2Nkp/3p1p2/7B/1p3p2/8/8/4QK2 w - - 0 1)

Ancin, Andrej

Sahovski Glasnik, 1965

3nR3/2N2Nkp/3p1p2/7B/1p3p2/8/8/4QK2

#2

6 + 7

14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Se6#
    • 1...Se6
      • 2.Sxe6#
    • 1...Sb7
      • 2.Se6#
    • 1...f3
      • 2.Qg3#
    • 1...f5
      • 2.Qa1#
  • Tries
    • 1.Rxd8?
      • threat
        • 2.Se6#
      • 1...f5
        • 2.Qa1#
      • 1...h6!
    • 1.Qe4?
      • threat
        • 2.Qg2#
      • 1...f5
        • 2.Qd4#
      • 1...Se6
        • 2.Sxe6#
      • 1...f3
        • 2.Qg4#
      • 1...h6
        • 2.Qg6#
      • 1...Sxf7!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qf8#
      • 1...h6
        • 2.Sxd8#
      • 1...Se6
        • 2.Sxe6#
      • 1...f5
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(g);N_GUARD::S(D)
    • S(g);N_GUARD::S(D),XS(g)
    • P(b);N_GUARD::QAR(A)
    • P(d);OGATEB::QAB(A)
  • Tries
    • Try
      • R(F);XS(g)
      • Threat
        • S(D)
      • Vars
        • P(d);OGATEB::QAB(A)
      • Refutation
        • P(f);
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(d);OGATEB::QAB(A)
        • S(g);N_GUARD::S(D),XS(g)
        • P(b);OGATE::QAR(A)
        • P(f);N_GUARD::QAR1(A)
      • Refutation
        • S(g);XS(E)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • P(f);SBLOCK::QAR(A)+S(E),XS(g)
      • S(g);N_GUARD::S(D),XS(g)
      • P(d);OGATE::QAR2(A)
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