MESON Chess Problem Database

Problem Display
PID: 76196 (2k5/bR1R4/8/n7/8/5K2/8/5Q2 w - - 0 1)

Lincoln, Robert A

5th Comm., Olimpiya dunyasi, 2006

2k5/bR1R4/8/n7/8/5K2/8/5Q2

#2

4 + 3

145 StrateGems 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Qb5?
      • threat
        • 2.Rbc7#
      • 1...Sxb7
        • 2.Qxb7#
      • 1...Bb8
        • 2.Rxb8#
      • 1...Bb6!
  • Keys
    • 1.Qa6!
      • 1...Sxb7
        • 2.Qxb7#
      • 1...Bf2
        • 2.Qa8#
      • 1...Bg1
        • 2.Qa8#
      • 1...Be3
        • 2.Qa8#
      • 1...Bd4
        • 2.Qa8#
      • 1...Bc5
        • 2.Qa8#
      • 1...Bb6
        • 2.Qa8#
      • 1...Bb8
        • 2.Rbc7#
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc4
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • R1(C)
      • Vars
        • S(a);OGATE,XR(C)::QAB1(A),XS(a)
        • B(b);N_GUARD::R1(C),XB(b)
      • Refutation
        • B(b);
  • Actual
    • Q(A);
    • Vars
      • S(a);OGATE,P_SPINS(a),XR(C)::QAB1(A),XS(a)
      • B(b);OGATE::QAR2(A)
      • B(b);SBLOCK::QAB(A)+R(C),DCHECK
      • S(a);N_GUARD::QAR2(A)
      • S(a);N_GUARD::QAR2(A),XS(a)
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