MESON Chess Problem Database

Problem Display
PID: 234748 (k2r4/4b3/1Q6/nKR5/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2014

k2r4/4b3/1Q6/nKR5/8/8/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Rc8#
    • 1...Rd2
      • 2.Rc8#
    • 1...Rd3
      • 2.Rc8#
    • 1...Rd4
      • 2.Rc8#
    • 1...Rd6
      • 2.Rc8#
    • 1...Rd7
      • 2.Rc8#
    • 1...Rc8
      • 2.Rxc8#
  • Tries
    • 1.Rc7?
      • threat
        • 2.Ra7#
        • 2.Qa7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Rd7
        • 2.Rc8#
        • 2.Qa7#
      • 1...Rb8
        • 2.Ra7#
      • 1...Bc5
        • 2.Ra7#
      • 1...Sc6
        • 2.Qb7#
      • 1...Rd5+!
  • Keys
    • 1.Ka6!
      • threat
        • 2.Qa7#
      • 1...Bxc5
        • 2.Qxd8#
      • 1...Rd6
        • 2.Rc8#
      • 1...Rd7
        • 2.Rc8#
      • 1...Sc6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD::R(B)
    • R(d);N_GUARD::R(B),XR(d)
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • R(d);P_PINQ(C)::R1(B)
        • B(b);::R1(B)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • R(d);CHECK
  • Actual
    • K(A);S_FLIGHT
    • Threat
      • QAR1(C)
    • Vars
      • B(b);N_GUARD,XR(B)::QAR(C),XR(d)
      • R(d);N_GUARD,P_PINQ(C)::R(B)
      • R(d);N_GUARD::R(B)
      • S(a);N_GUARD::QAB1(C)
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