MESON Chess Problem Database

Problem Display
PID: 194749 (8/1P1KNp2/b1p2N2/4k1p1/Rn6/3p1PPn/3Q4/b7 w - - 0 1)

Sero, ?

Western Daily Mercury, 1917

(First published on Fri Jan 19 1917)

8/1P1KNp2/b1p2N2/4k1p1/Rn6/3p1PPn/3Q4/b7

#2

8 + 9

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qxb2#
    • 1...Bc3
      • 2.Qxc3#
    • 1...Bd4
      • 2.Sg4#
    • 1...Sa2
      • 2.Sg4#
    • 1...Sc2
      • 2.Sg4#
    • 1...Sd5
      • 2.Sg4#
  • Tries
    • 1.Qe1+?
      • 1...Kxf6
        • 2.Qxa1#
      • 1...Kd4!
    • 1.Qxb4?
      • threat
        • 2.Sg4#
        • 2.Qd6#
      • 1...Bc4
        • 2.Qd6#
      • 1...Sf2
        • 2.Qd6#
      • 1...g4
        • 2.Sxg4#
        • 2.Qd6#
      • 1...c5
        • 2.Sg4#
      • 1...Kxf6!
    • 1.b8Q+?
      • 1...Kxf6
        • 2.Qh8#
      • 1...Kd4!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qxa1#
      • 1...Kd4
        • 2.Sxc6#
      • 1...Kxf6
        • 2.Qxa1#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Sg4#
      • 1...Sa2
        • 2.Sg4#
      • 1...Sc2
        • 2.Sg4#
      • 1...Sd5
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB(A),XB(a)
    • B(a);SBLOCK::S(E)
    • S(d);::S(E)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(E)::QAB(A),XB(a)
      • Refutation
        • K(e);P_SPINS(d),S_FLIGHT
    • Try
      • Q(A);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);::QAB1(A)
        • S(c);::QAB1(A)
        • P(h);::S(E)
      • Refutation
        • K(e);S_FLIGHT,XS(E)
    • Try
      • P(F);CHECK
      • Vars
        • K(e);OGATEB,S_FLIGHT,XS(E)::QAB(F)
      • Refutation
        • K(e);P_SPINP(b),P_SPINS(d),S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A),XB(a)
    • Vars
      • K(e);P_SPINS(d),S_FLIGHT::S(H),XP(h)
      • K(e);S_FLIGHT,XS(E)::QAB(A),XB(a)
      • B(a);N_GUARD::QAB(A),XB(a)
      • B(a);SBLOCK::S(E)
      • S(d);::S(E)
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