MESON Chess Problem Database

Problem Display
PID: 132518 (4k3/1r4p1/1BPQ4/3K4/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2003

4k3/1r4p1/1BPQ4/3K4/8/8/8/8

#2

4 + 3

145 StrateGems 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rf7
      • 2.Qd8#
  • Tries
    • 1.Ke6?
      • threat
        • 2.Qd8#
      • 1...Re7+
        • 2.Qxe7#
      • 1...Rxb6
        • 2.Qe7#
      • 1...Rd7
        • 2.cxd7#
      • 1...Rb8
        • 2.Qe7#
        • 2.Qxb8#
      • 1...Rc7!
    • 1.Qe6+?
      • 1...Re7
        • 2.Qg8#
      • 1...Kf8!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Qf8#
      • 1...Kf7
        • 2.Qe6#
      • 1...Rd7
        • 2.Qxd7#
      • 1...Re7
        • 2.Qxe7#
      • 1...Rf7
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK::QAR1(D)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR1(D)
      • Vars
        • R(a);CHECK,N_GUARD::QAR1(D),XR(a)
        • R(a);N_GUARD,XB(B)::QAR1(D)
        • R(a);OGATE::P(C),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(D);CHECK
      • Vars
        • R(a);P_SPINR(a),SBLOCK::QAR2(D)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • B(B);
    • Threat
      • QAR1(D)
    • Vars
      • K(c);S_FLIGHT::QAB1(D)
      • R(a);N_GUARD,P_PINQ(D)::QAB1(D),XR(a)
      • R(a);N_GUARD::QAR1(D),XR(a)
      • R(a);N_GUARD,SBLOCK::QAR(D)
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