MESON Chess Problem Database

Problem Display
PID: 203210 (7Q/8/2pp4/3k1n2/4RK2/8/8/8 w - - 0 1)

Birgfeld, Eduard Adolf Heinrich

Allgemeine Zeitung Chemnitz, 1924

7Q/8/2pp4/3k1n2/4RK2/8/8/8

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qd4#
    • 1...Sg3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sh4
      • 2.Qd4#
    • 1...Sh6
      • 2.Qd4#
    • 1...Se7
      • 2.Qd4#
    • 1...c5
      • 2.Qa8#
  • Tries
    • 1.Kxf5?
      • threat
        • 2.Qd4#
      • 1...c5
        • 2.Qa8#
      • 1...Kc5!
    • 1.Qb2?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se3
        • 2.Qd4#
      • 1...Sg3
        • 2.Qd4#
      • 1...Sh4
        • 2.Qd4#
      • 1...Sh6
        • 2.Qd4#
      • 1...Se7
        • 2.Qd4#
      • 1...Sg7
        • 2.Qd4#
      • 1...c5
        • 2.Qb7#
      • 1...Kc5!
    • 1.Qc3?
      • threat
        • 2.Qc4#
      • 1...Se3
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...c5!
  • Keys
    • 1.Qa1!
      • 1...Kc5
        • 2.Qa5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se3
        • 2.Qd4#
      • 1...Sg3
        • 2.Qd4#
      • 1...Sh4
        • 2.Qd4#
      • 1...Sh6
        • 2.Qd4#
      • 1...Se7
        • 2.Qd4#
      • 1...Sg7
        • 2.Qd4#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR1(C)
    • S(b);N_GUARD::QAR1(C),XS(b)
    • P(c);OGATEB,SBLOCK::QAB(C)
  • Tries
    • Try
      • K(B);P-FLIGHT,XS(b)
      • Threat
        • QAR1(C)
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • S(b);N_GUARD::QAR1(C),XS(b)
        • S(b);N_GUARD::QAR1(C)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • S(b);N_GUARD::QAR1(C)
        • S(b);N_GUARD::QAR1(C),XS(b)
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::QAR2(C)
      • S(b);N_GUARD::QAR1(C),XS(b)
      • S(b);N_GUARD::QAR1(C)
      • P(c);OGATEB,SBLOCK::QAB(C)
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