MESON Chess Problem Database

Problem Display
PID: 223441 (8/7N/P6b/8/8/2nNpKBk/7P/Q2n4 w - - 0 1)

Phelps, Francis Bradley

King's County Gazette, 1886

8/7N/P6b/8/8/2nNpKBk/7P/Q2n4

#2

7 + 5

16734 Toledo Daily Blade 1887
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Sxf4#
    • 1...Bg5
      • 2.Sxg5#
    • 1...Bg7
      • 2.Sf4#
      • 2.Sg5#
    • 1...Bf8
      • 2.Sf4#
      • 2.Sg5#
    • 1...Sb2
      • 2.Qf1#
    • 1...Sf2
      • 2.Qf1#
  • Tries
    • 1.Sf2+?
      • 1...Sxf2
        • 2.Qf1#
      • 1...exf2!
    • 1.Qxd1?
      • threat
        • 2.Qf1#
      • 1...e2
        • 2.Sf2#
      • 1...Sxd1!
    • 1.Qa4?
      • threat
        • 2.Qd7#
        • 2.Qg4#
        • 2.Qh4#
      • 1...Bf4
        • 2.Sxf4#
        • 2.Qd7#
      • 1...Bg5
        • 2.Sxg5#
        • 2.Qd7#
        • 2.Qg4#
      • 1...Sf2
        • 2.Qh4#
      • 1...Se4
        • 2.Qd7#
      • 1...Sb5
        • 2.Qg4#
        • 2.Qh4#
      • 1...Sxa4!
  • Keys
    • 1.Qc1!
      • 1...Bf4
        • 2.Sxf4#
      • 1...Bg5
        • 2.Sxg5#
      • 1...Bg7
        • 2.Sf4#
        • 2.Sg5#
      • 1...Bf8
        • 2.Sf4#
        • 2.Sg5#
      • 1...Sb2
        • 2.Qf1#
      • 1...Sf2
        • 2.Qf1#
      • 1...Sb1
        • 2.Qc8#
      • 1...Sa2
        • 2.Qc8#
      • 1...Se2
        • 2.Qc8#
      • 1...Sa4
        • 2.Qc8#
      • 1...Se4
        • 2.Qc8#
      • 1...Sb5
        • 2.Qc8#
      • 1...Sd5
        • 2.Qc8#
      • 1...e2
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(e);N_GUARD::S(C),XB(e)
    • B(e);N_GUARD::S(G),XB(e)
    • S(a);OGATE::QAB(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(a);OGATE,XS(C)::QAB(A)
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(A);XS(a)
      • Threat
        • QAB(A)
      • Vars
        • P(c);N_GUARD::S(C)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);::QAR1(A)
        • S(b);::QAB(A)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • B(e);N_GUARD::S(C),XB(e)
      • B(e);N_GUARD::S(G),XB(e)
      • S(a);OGATE::QAB(A)
      • S(b);OGATE::QAB(A)
      • S(b);OGATE,SBLOCK::QAB(A)
      • P(c);OGATE::QAR(A),XB(e)
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