MESON Chess Problem Database

Problem Display
PID: 234742 (2NBk2n/2K5/5Q2/8/8/b7/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2014

2NBk2n/2K5/5Q2/8/8/b7/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Sd6#
      • 2.Qe7#
    • 1...Bb2
      • 2.Sd6#
      • 2.Qe7#
    • 1...Bd6+
      • 2.Sxd6#
    • 1...Be7
      • 2.Qxe7#
  • Tries
    • 1.Qxh8+?
      • 1...Bf8
        • 2.Sd6#
        • 2.Qh5#
      • 1...Kf7!
    • 1.Qe6+?
      • 1...Be7
        • 2.Qxe7#
      • 1...Kf8!
  • Keys
    • 1.Be7!
      • threat
        • 2.Qf8#
      • 1...Bd6+
        • 2.Sxd6#
      • 1...Bxe7
        • 2.Qxe7#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sf7
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,N_GUARD::S(C),XB(a)
    • B(a);N_GUARD::QAR1(A),XB(a)
  • Tries
    • Try
      • Q(A);CHECK,XS(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • B(D);
    • Threat
      • QAR1(A)
    • Vars
      • B(a);CHECK,N_GUARD::S(C),XB(a)
      • B(a);OGATE,XB(D)::QAR1(A),XB(a)
      • S(c);N_GUARD::QAB(A),XS(c)
      • S(c);SBLOCK::QAB(A)
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