MESON Chess Problem Database

Problem Display
PID: 149411 (3n4/8/8/3k4/Q7/1N6/3KN2B/8 w - - 0 1)

Dehler, Ernst Georg

Sammler, 1918

3n4/8/8/3k4/Q7/1N6/3KN2B/8

#2

5 + 2

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Sc3#
  • Tries
    • 1.Kd3?
      • threat
        • 2.Qd7#
        • 2.Qc4#
        • 2.Qe4#
      • 1...Sc6
        • 2.Qc4#
        • 2.Qe4#
      • 1...Sb7
        • 2.Qc4#
        • 2.Qe4#
      • 1...Sf7
        • 2.Qc4#
        • 2.Qe4#
      • 1...Ke6!
    • 1.Sed4?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Se6
        • 2.Qc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Sf7
        • 2.Qc6#
      • 1...Ke4!
    • 1.Bc7?
      • threat
        • 2.Sf4#
      • 1...Se6
        • 2.Sc3#
      • 1...Ke6!
    • 1.Bb8?
      • threat
        • 2.Sf4#
      • 1...Se6
        • 2.Sc3#
      • 1...Ke6!
    • 1.Qb5+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Ke6!
    • 1.Qd7+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc4!
    • 1.Qa6?
      • threat
        • 2.Sc3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Sc6!
  • Keys
    • 1.Sbd4!
      • 1...Ke4
        • 2.Sc3#
      • 1...Kc5
        • 2.Qb5#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Se6
        • 2.Qc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Sf7
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::S(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • S(b);N_GUARD::QAB1(E),XS(b)
        • S(b);N_GUARD::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);
      • Threat
        • S(B)
      • Vars
        • S(b);SBLOCK::S(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);
      • Threat
        • S(B)
      • Vars
        • S(b);SBLOCK::S(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • S(B)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • S(b);
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::S(B)
      • K(a);P-FLIGHT::QAR1(E)
      • S(b);N_GUARD::QAB1(E),XS(b)
      • S(b);N_GUARD::QAB1(E)
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