MESON Chess Problem Database

Problem Display
PID: 72870 (8/8/8/8/8/8/1Q1pk3/5NK1 w - - 0 1)

Hannemann, Knud Harald

Die Schwalbe, 1929

8/8/8/8/8/8/1Q1pk3/5NK1

#2

3 + 2

5454 Near Snap 2007
136 Problem Observer 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd1
      • 2.Qxd2#
    • 1...Ke1
      • 2.Qxd2#
  • Tries
    • 1.Kg2?
      • threat
        • 2.Qxd2#
      • 1...Kd1
        • 2.Qxd2#
      • 1...Ke1
        • 2.Qxd2#
      • 1...Kd3!
    • 1.Qc2?
      • 1...Ke1
        • 2.Qxd2#
      • 1...Kf3!
  • Keys
    • 1.Qc3!
      • 1...Kd1
        • 2.Qxd2#
      • 1...Ke1
        • 2.Qxd2#
      • 1...d1Q
        • 2.Qe3#
      • 1...d1S
        • 2.Sg3#
      • 1...d1B
        • 2.Sg3#
        • 2.Qe3#
      • 1...d1R
        • 2.Qe3#

This anticipates 15919(1989)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::QAR1(C),XP(a)
    • K(b);N_SPINP(a),P-FLIGHT::QAB1(C),XP(a)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAR1(C),XP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAR1(C),XP(a)
        • K(b);N_SPINP(a),P-FLIGHT::QAB1(C),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAB1(C),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
  • Actual
    • Q(C);N_PINP(a)
    • Vars
      • K(b);S_FLIGHT::QAR1(C),XP(a)
      • K(b);P-FLIGHT,P_SPINP(a)::QAB1(C),XP(a)
      • P(a);P_PINS(A),SBLOCK::QAR1(C)
      • P(a);SBLOCK::S(A)
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