MESON Chess Problem Database

Problem Display
PID: 46669 (8/4R3/K1kp4/8/8/Q7/8/1Br5 w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

8/4R3/K1kp4/8/8/Q7/8/1Br5

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qb5#
      • 1...Rxb1
        • 2.Qc4#
      • 1...d5
        • 2.Qb6#
      • 1...Rc5
        • 2.Qb7#
      • 1...Kc5!
    • 1.Qc3+?
      • 1...Kd5
        • 2.Ba2#
        • 2.Be4#
      • 1...Rxc3!
    • 1.Qa5?
      • threat
        • 2.Rc7#
        • 2.Qb5#
      • 1...Rxb1
        • 2.Rc7#
      • 1...d5
        • 2.Qb6#
        • 2.Qc7#
      • 1...Rc5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qb5#
      • 1...Kd5
        • 2.Be4#
      • 1...Rxb1
        • 2.Qc4#
      • 1...Rc5
        • 2.Qb7#
      • 1...d5
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • R(a);N_GUARD,XB(A)::QAR2(B)
        • P(c);SBLOCK::QAR1(B)
        • R(a);SBLOCK::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • R(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XB(A)::R1(D)
      • Refutation
        • R(a);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(b);S_FLIGHT::B(A)
      • R(a);N_GUARD,XB(A)::QAR2(B)
      • R(a);SBLOCK::QAB1(B)
      • P(c);SBLOCK::QAR1(B)
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