MESON Chess Problem Database

Problem Display
PID: 156895 (8/8/8/8/5K2/Rpk5/1N6/5Q2 w - - 0 1)

Abramov, V

Vestnik nedeli, 1989

8/8/8/8/5K2/Rpk5/1N6/5Q2

#2

4 + 2

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc4#
  • Tries
    • 1.Rxb3+?
      • 1...Kc2
        • 2.Qd1#
      • 1...Kd2
        • 2.Qd1#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kxb3!
    • 1.Qe2?
      • 1...Kd4
        • 2.Qc4#
        • 2.Qe5#
      • 1...Kb4!
    • 1.Qc1+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kb4!
  • Keys
    • 1.Ra1!
      • 1...Kxb2
        • 2.Qc1#
      • 1...Kc2
        • 2.Qc1#
      • 1...Kd2
        • 2.Qd3#
      • 1...Kb4
        • 2.Qc4#
      • 1...Kd4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • R(C);CHECK,XP(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT,XR(C)
    • Try
      • Q(A);
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINP(a),OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
  • Actual
    • R(C);N_PINP(a)
    • Vars
      • K(b);S_FLIGHT,XS(B)::QAB1(A)
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);S_FLIGHT::QAR1(A)
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