MESON Chess Problem Database

Problem Display
PID: 74945 (8/3P4/r3p3/3pk1K1/1Q2N3/8/4n3/6Bn w - - 0 1)

Beetz, Sebastian

Problem Online, 2006

8/3P4/r3p3/3pk1K1/1Q2N3/8/4n3/6Bn

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qd4#
    • 1...Sc3
      • 2.Qd4#
    • 1...Sg3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sf4
      • 2.Qd4#
    • 1...dxe4
      • 2.Qc5#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sf7#
      • 1...d4
        • 2.Qc5#
      • 1...Sd4
        • 2.Bxd4#
      • 1...Rxd6!
    • 1.Sf6?
      • threat
        • 2.Sg4#
      • 1...Sd4
        • 2.Bxd4#
      • 1...d4
        • 2.Qc5#
      • 1...Sf2!
    • 1.d8Q?
      • threat
        • 2.Qf6#
        • 2.Qh8#
      • 1...dxe4
        • 2.Qc5#
        • 2.Qb5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Ra7
        • 2.Qf6#
        • 2.Qdd6#
      • 1...Ra8
        • 2.Qf6#
        • 2.Qc7#
        • 2.Qdd6#
      • 1...d4!
    • 1.d8S?
      • threat
        • 2.Sf7#
      • 1...dxe4
        • 2.Qc5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Ra7
        • 2.Sc6#
      • 1...d4!
    • 1.d8B?
      • threat
        • 2.Bf6#
      • 1...dxe4
        • 2.Qc5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...d4!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Sf3#
      • 1...Sxg1
        • 2.Qf4#
      • 1...d4
        • 2.Qc5#
      • 1...Ra3
        • 2.Qb8#
      • 1...Sd4
        • 2.Bxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::QAB1(B)
    • S(b);N_GUARD::QAB1(B),XS(b)
    • P(c);OGATEB,SBLOCK,XS(C)::QAR2(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • P(c);OGATEB::QAR2(B)
        • S(b);N_GUARD::B(A),XS(b)
      • Refutation
        • R(e);XS(C)
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • S(b);N_GUARD::B(A),XS(b)
        • P(c);OGATEB::QAR2(B)
      • Refutation
        • S(a);
    • Try
      • P(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • P(c);
    • Try
      • P(E);
      • Threat
        • S(E)
      • Vars
        • P(c);OGATEB,SBLOCK,XS(C)::QAR2(B)
        • S(b);N_GUARD::QAB1(B),XS(b)
        • R(e);N_GUARD::S(E)
      • Refutation
        • P(c);
    • Try
      • P(E);
      • Threat
        • B(E)
      • Vars
        • P(c);OGATEB,SBLOCK,XS(C)::QAR2(B)
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • P(c);
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • S(b);N_GUARD,XB(A)::QAB1(B)
      • P(c);OGATEB::QAR2(B)
      • R(e);N_GUARD::QAB(B)
      • S(b);N_GUARD::B(A),XS(b)
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