MESON Chess Problem Database

Problem Display
PID: 170488 (4K3/3B4/8/3pkP2/8/8/2Q2B2/8 w - - 0 1)

Massmann, Wilhelm Karl Heinrich

Basler Nachrichten, 1971

4K3/3B4/8/3pkP2/8/8/2Q2B2/8

#2

5 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Bg3#
  • Tries
    • 1.Qa4?
      • 1...Kd6
        • 2.Qf4#
      • 1...d4
        • 2.Qxd4#
      • 1...Kf6!
    • 1.Qc1?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kd6
        • 2.Bg3#
        • 2.Qf4#
      • 1...Kf6
        • 2.Bd4#
      • 1...d4!
    • 1.Qc3+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kd6
        • 2.Bg3#
        • 2.Qg3#
      • 1...d4
        • 2.Qxd4#
      • 1...Kf4!
    • 1.Qc5?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kf6
        • 2.Qe7#
      • 1...Kf4!
  • Keys
    • 1.Qd2!
      • 1...Ke4
        • 2.Qe3#
      • 1...Kd6
        • 2.Qf4#
      • 1...Kf6
        • 2.Bd4#
      • 1...d4
        • 2.Qxd4#

Anticipated by 121469(1902), 121470(1910)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(B)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAB(A)
        • P(a);::QAB1(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::B(B)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • P(a);P_SPINP(a)::QAB1(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(A)
        • K(b);N_SPINP(a),S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);P_SPINP(a),S_FLIGHT::QAB(A)
      • K(b);S_FLIGHT::B(B)
      • P(a);::QAB1(A),XP(a)
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