MESON Chess Problem Database

Problem Display
PID: 234638 (1qk5/2B5/3R4/8/8/5Q2/3R3K/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2005

1qk5/2B5/3R4/8/8/5Q2/3R3K/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc7
      • 2.Qc6#
  • Tries
    • 1.Qg4+?
      • 1...Kxc7
        • 2.Qd7#
      • 1...Kb7!
    • 1.Qa8?
      • threat
        • 2.Qxb8#
      • 1...Kxc7
        • 2.Rc6#
        • 2.Qc6#
      • 1...Qxa8!
    • 1.Qh3+?
      • 1...Kxc7
        • 2.Qd7#
      • 1...Kb7!
    • 1.Qf5+?
      • 1...Kxc7
        • 2.Qd7#
      • 1...Kb7!
    • 1.Qf8+?
      • 1...Kb7
        • 2.Qxb8#
      • 1...Kxc7!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Rd8#
      • 1...Qxc7
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);OGATEB,P-FLIGHT,XB(E)::QAR1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(E)::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);P_PINQ(a)
      • Threat
        • QAR1(C),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(E)::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(E)::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(C),XQ(a)
      • Refutation
        • K(b);P-FLIGHT,XB(E)
  • Actual
    • R(A);
    • Threat
      • R1(D)
    • Vars
      • Q(a);OGATEB,P_PINR(D),P_SPINQ(a),XB(E)::QAR2(C)
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