MESON Chess Problem Database

Problem Display
PID: 234632 (8/8/PB6/1k6/Rp1QK3/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2005

8/8/PB6/1k6/Rp1QK3/8/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kd5?
      • threat
        • 2.Ra5#
        • 2.Qxb4#
      • 1...b3
        • 2.Ra5#
        • 2.Qb4#
      • 1...Kxa4!
    • 1.Bd8?
      • 1...Kc6
        • 2.Qd5#
      • 1...b3
        • 2.Qc4#
      • 1...Kxa4!
    • 1.Rxb4+?
      • 1...Kc6
        • 2.Qd5#
      • 1...Kxa6!
    • 1.Qd7+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kxb6!
  • Keys
    • 1.Ba5!
      • 1...Kxa4
        • 2.Qxb4#
      • 1...Kxa6
        • 2.Qb6#
      • 1...Kc6
        • 2.Qd5#
      • 1...b3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XR(A)
    • Try
      • B(E);
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • P(a);::QAB1(B)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XR(A)
    • Try
      • R(A);CHECK,XP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT,XP(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT,XB(E)
  • Actual
    • B(E);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT,XR(A)::QAR1(B),XP(a)
      • K(b);S_FLIGHT,XP(D)::QAR1(B)
      • K(b);S_FLIGHT::QAB1(B)
      • P(a);::QAB1(B)
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