MESON Chess Problem Database

Problem Display
PID: 4937 (1N2N3/4k1K1/8/4nB2/Q3n3/8/8/4R3 w - - 0 1)

Teed, Frank Melville

Montreal Gazette, 1894

1N2N3/4k1K1/8/4nB2/Q3n3/8/8/4R3

#2

6 + 3

5454 Near Snap 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qd7#
    • 1...Sf2
      • 2.Qd7#
    • 1...Sc3
      • 2.Qd7#
    • 1...Sg3
      • 2.Qd7#
    • 1...Sg5
      • 2.Qd7#
    • 1...Sd6
      • 2.Qd7#
    • 1...Sd3
      • 2.Qd7#
    • 1...Sf3
      • 2.Qd7#
    • 1...Sc4
      • 2.Qd7#
    • 1...Sg4
      • 2.Qd7#
    • 1...Sg6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
    • 1...Sf7
      • 2.Qd7#
  • Tries
    • 1.Sc6+?
      • 1...Kxe8
        • 2.Qa8#
      • 1...Sxc6!
  • Keys
    • 1.Qa8!
      • 1...Kd8
        • 2.Sc6#
      • 1...Kxe8
        • 2.Sc6#
      • 1...Sc5
        • 2.Sc6#
      • 1...Sd2
        • 2.Sc6#
      • 1...Sf2
        • 2.Sc6#
      • 1...Sc3
        • 2.Sc6#
      • 1...Sg3
        • 2.Sc6#
      • 1...Sg5
        • 2.Sc6#
      • 1...Sd6
        • 2.Sc6#
      • 1...Sf6
        • 2.Sc6#
      • 1...Sd3
        • 2.Sc6#
      • 1...Sf3
        • 2.Sc6#
      • 1...Sc4
        • 2.Sc6#
      • 1...Sg4
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sg6
        • 2.Sc6#
      • 1...Sd7
        • 2.Sc6#
      • 1...Sf7
        • 2.Sc6#

Anticipated by 144767(1887)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 13
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);P_SPINS(b)::QAR1(B)
    • S(b);N_GUARD,P_SPINS(a)::QAR1(B)
    • S(b);N_GUARD,P_SPINS(a)::QAR1(B),XS(b)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(F)::QAR(B)
      • Refutation
        • S(b);P_SPINS(a),XS(E)
  • Actual
    • Q(B);
    • Vars
      • K(c);S_FLIGHT::QAR(B)+S(E),DCHECK
      • K(c);P-FLIGHT,XS(F)::QAR(B)+S(E)
      • S(a);P_SPINS(b)::S(E)
      • S(b);N_GUARD,P_SPINS(a)::S(E)
      • S(b);N_GUARD,P_SPINS(a)::S(E),XS(b)
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