MESON Chess Problem Database

Problem Display
PID: 110222 (1b6/2Q2Nn1/7N/3BR3/r4k2/8/2n4K/3b4 w - - 0 1)

Labai, Zoltan

Pedagogusok Lapja, 1990

1b6/2Q2Nn1/7N/3BR3/r4k2/8/2n4K/3b4

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Re4#
    • 1...Ba7
      • 2.Re1#
      • 2.Re2#
      • 2.Re6#
      • 2.Re7#
      • 2.Re8#
    • 1...Sa1
      • 2.Qc1#
    • 1...Se1
      • 2.Qc1#
    • 1...Sa3
      • 2.Qc1#
    • 1...Se3
      • 2.Rf5#
    • 1...Sb4
      • 2.Qc1#
      • 2.Qc4#
    • 1...Sd4
      • 2.Qc1#
  • Tries
    • 1.Qd8?
      • threat
        • 2.Qg5#
      • 1...Se6
        • 2.Qf6#
      • 1...Re4!
    • 1.Qc4+?
      • 1...Sd4
        • 2.Qc1#
      • 1...Rxc4!
    • 1.Qe7?
      • threat
        • 2.Qg5#
      • 1...Se6
        • 2.Qf6#
      • 1...Re4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qg3#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Ra3
        • 2.Re4#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sh5
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);SBLOCK::QAB(E)+R(C),DCHECK
    • S(b);OGATE::QAB(E)
    • S(b);SBLOCK::QAB(E)+R(C),DCHECK
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • S(e);N_GUARD::QAR2(E)
      • Refutation
        • R(c);
    • Try
      • Q(E);CHECK
      • Vars
        • S(b);OGATE,P_SPINS(b)::QAB(E)
      • Refutation
        • R(c);XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • S(e);N_GUARD::QAR2(E)
      • Refutation
        • R(c);
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • B(a);N_GUARD::QAR1(E),XB(a)
      • R(c);N_GUARD::R1(C)
      • S(b);N_GUARD::QAB1(E),XS(b)
      • S(e);N_GUARD::R1(C),XS(e)
      • S(e);N_GUARD::R1(C)
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