MESON Chess Problem Database

Problem Display
PID: 160140 (6n1/3b3R/5k2/7Q/2R5/8/8/7K w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 2003

6n1/3b3R/5k2/7Q/2R5/8/8/7K

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6+
      • 2.Rxc6#
  • Tries
    • 1.Rf4+?
      • 1...Bf5
        • 2.Qxf5#
      • 1...Ke6!
    • 1.Rc6+?
      • 1...Be6
        • 2.Rf7#
      • 1...Bxc6+!
    • 1.Qf7+?
      • 1...Kg5
        • 2.Rh5#
      • 1...Ke5!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Qf7#
      • 1...Bc6+
        • 2.Rxc6#
      • 1...Ke6
        • 2.Qe5#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Be6
        • 2.Qg5#
      • 1...Be8
        • 2.Qf5#
      • 1...Sh6
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(b);CHECK,N_GUARD::R(B),XB(b)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR1(C),XB(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • B(b);P_SPINB(b)::R1(D)
      • Refutation
        • B(b);CHECK,XR(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • QAR1(C)
    • Vars
      • B(b);CHECK,N_GUARD::R(B),XB(b)
      • K(a);P-FLIGHT::QAR1(C)
      • B(b);N_GUARD::QAR1(C),XB(b)
      • B(b);SBLOCK::QAB1(C)
      • B(b);N_GUARD::QAR1(C)
      • S(c);N_GUARD::QAR2(C),XS(c)
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