MESON Chess Problem Database

Problem Display
PID: 234737 (8/8/Nr6/8/kB6/2pQ4/K7/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2013

8/8/Nr6/8/kB6/2pQ4/K7/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Qc2#
  • Tries
    • 1.Qd7+?
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rb5!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Sc5#
      • 1...Rxb4
        • 2.Qxb4#
      • 1...Rxa6
        • 2.Bxc3#
      • 1...Rb5
        • 2.Qb3#
      • 1...Rc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::QAB(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB(B),XR(c)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • Q(B);
    • Threat
      • S(D)
    • Vars
      • R(c);OGATE,P_SPINR(c),XB(C)::QAR1(B),XR(c)
      • R(c);N_GUARD,XS(D)::QAR(B)+B(C),XP(a)
      • R(c);SBLOCK::QAB1(B)
      • R(c);N_GUARD::QAB(B),XR(c)
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