MESON Chess Problem Database

Problem Display
PID: 234646 (6R1/QKn2k2/6Rb/8/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2005

6R1/QKn2k2/6Rb/8/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.Kxa6#
    • 1...Sa8
      • 2.Kxa8#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Qxc7#
        • 2.Qf6#
      • 1...Ke7
        • 2.Qxc7#
      • 1...Bg7
        • 2.R6xg7#
      • 1...Bf4
        • 2.R6g7#
        • 2.Qf6#
      • 1...Bg5
        • 2.R6g7#
      • 1...Sb5
        • 2.Qe6#
        • 2.Qf6#
      • 1...Sd5
        • 2.Qe6#
      • 1...Sa6
        • 2.Qe6#
        • 2.Qf6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sa8
        • 2.Qe6#
        • 2.Qf6#
      • 1...Se8
        • 2.Qe6#
      • 1...Bf8!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qxc7#
      • 1...Ke7
        • 2.Qxc7#
      • 1...Bg7
        • 2.R8xg7#
      • 1...Bf4
        • 2.R8g7#
        • 2.Qf8#
      • 1...Bg5
        • 2.R8g7#
        • 2.Qf8#
      • 1...Bf8
        • 2.Qxf8#
      • 1...Sb5
        • 2.Qe8#
      • 1...Sd5
        • 2.Qe8#
      • 1...Sa6
        • 2.Qe8#
      • 1...Se6
        • 2.Qe8#
      • 1...Sa8
        • 2.Qe8#
      • 1...Se8
        • 2.Qxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(b);::QAR(B)+K(C),XS(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(B),XS(b)
        • B(a);N_GUARD::R1(A),XB(a)
        • B(a);N_GUARD::R1(A)
        • S(b);N_GUARD::QAB1(B)
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • B(a);
  • Actual
    • Q(B);
    • Threat
      • QAR(B),XS(b)
    • Vars
      • K(c);P-FLIGHT::QAR2(B),XS(b)
      • B(a);N_GUARD::R1(D),XB(a)
      • B(a);N_GUARD::QAR1(B),XB(a)
      • S(b);N_GUARD::QAB1(B)
      • S(b);N_GUARD::QAB1(B),XS(b)
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