MESON Chess Problem Database

Problem Display
PID: 29784 (8/8/8/5n2/8/3Qn1Pk/8/6KN w - - 0 1)

Petite, Efren

Comm., Nikolaev-200 JT, 1988

8/8/8/5n2/8/3Qn1Pk/8/6KN

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qxf5#
    • 1...Sf1
      • 2.Sf2#
      • 2.Qxf5#
    • 1...Sc2
      • 2.Sf2#
      • 2.Qxf5#
    • 1...Sg2
      • 2.Sf2#
      • 2.Qxf5#
    • 1...Sc4
      • 2.Sf2#
      • 2.Qxf5#
    • 1...Sg4
      • 2.Qf1#
    • 1...Sd5
      • 2.Sf2#
      • 2.Qxf5#
  • Tries
    • 1.Qxf5+?
      • 1...Sg4
        • 2.Qf1#
        • 2.Qh5#
      • 1...Sxf5!
  • Keys
    • 1.Qe4!
      • 1...Sxg3
        • 2.Sf2#
      • 1...Sd1
        • 2.Qxf5#
      • 1...Sf1
        • 2.Qxf5#
      • 1...Sc2
        • 2.Qxf5#
      • 1...Sg2
        • 2.Qxf5#
      • 1...Sc4
        • 2.Qxf5#
      • 1...Sg4
        • 2.Qg2#
      • 1...Sd5
        • 2.Qxf5#
      • 1...Sd4
        • 2.Qh4#
      • 1...Sh4
        • 2.Qxh4#
      • 1...Sd6
        • 2.Qh4#
      • 1...Sh6
        • 2.Qh4#
      • 1...Se7
        • 2.Qh4#
      • 1...Sg7
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(C),XS(c)
    • S(a);N_GUARD,SBLOCK::QAB(C)
  • Tries
    • Try
      • Q(C);CHECK,XS(c)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • S(c);SBLOCK,XP(D)::S(B)
      • S(a);N_GUARD::QAB(C),XS(c)
      • S(a);N_GUARD,SBLOCK::QAB1(C)
      • S(c);N_GUARD::QAR1(C)
      • S(c);N_GUARD::QAR1(C),XS(c)
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