MESON Chess Problem Database

Problem Display
PID: 6266 (8/8/3Q4/K7/8/8/kpB5/B7 w - - 0 1)

Hannemann, Knud Harald

Die Schwalbe, 1928

8/8/3Q4/K7/8/8/kpB5/B7

#2

4 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa1
      • 2.Qa3#
  • Tries
    • 1.Ka4?
      • threat
        • 2.Qa3#
      • 1...Kxa1
        • 2.Qa3#
      • 1...b1S!
    • 1.Qd5+?
      • 1...Ka3
        • 2.Qb3#
      • 1...Kxa1!
    • 1.Qe6+?
      • 1...Ka3
        • 2.Qb3#
      • 1...Kxa1!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qxb2#
        • 2.Qa4#
      • 1...Kxa1
        • 2.Qa3#
        • 2.Qa4#
      • 1...bxa1Q
        • 2.Qb3#
      • 1...bxa1S
        • 2.Bb1#
      • 1...bxa1B
        • 2.Bb1#
        • 2.Qb3#
      • 1...bxa1R
        • 2.Qb3#
      • 1...b1Q
        • 2.Qa4#
      • 1...b1S
        • 2.Qb2#
      • 1...b1B
        • 2.Qb2#
        • 2.Qa4#
      • 1...b1R
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT,XB(A)::QAR2(D)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAR1(D)
      • Vars
        • K(a);P-FLIGHT,XB(A)::QAR2(D)
      • Refutation
        • P(b);
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XB(A)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XB(A)
  • Actual
    • Q(D);
    • Threat
      • DUALS(2)
    • Vars
      • P(b);SBLOCK,XB(A)::QAB1(D)
      • P(b);SBLOCK,XB(A)::B(B)
      • P(b);::QAR2(D)
      • P(b);::QAR1(D)
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