MESON Chess Problem Database

Problem Display
PID: 218026 (4RK2/4N3/2P3P1/5P2/3PkN2/b4p1B/8/B1Q5 w - - 0 1)

Sparke, Arthur M

British Chess Magazine, 1920

4RK2/4N3/2P3P1/5P2/3PkN2/b4p1B/8/B1Q5

#2

11 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc1
      • 2.Sed5#
    • 1...Bxe7+
      • 2.Rxe7#
    • 1...f2
      • 2.Bg2#
  • Tries
    • 1.Qc2+?
      • 1...Ke3
        • 2.Sd5#
      • 1...Kxf4!
  • Keys
    • 1.f6!
      • threat
        • 2.Bf5#
      • 1...Bxe7+
        • 2.Rxe7#
      • 1...Bxc1
        • 2.Sed5#
      • 1...Bb2
        • 2.Sf5#
      • 1...f2
        • 2.Bg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);N_PINS(I),XQ(B)::R(J)+S(I)
    • B(a);CHECK,OGATE,P_SPINB(a),XS(I)::R(J),XB(a)
    • P(b);OGATEB::B(C)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::S(E)
      • Refutation
        • K(c);P-FLIGHT,XS(E)
  • Actual
    • P(F);
    • Threat
      • B(C)
    • Vars
      • B(a);CHECK,OGATE,P_SPINB(a),XS(I)::R(J),XB(a)
      • B(a);N_PINS(I),XQ(B)::R(J)+S(I)
      • B(a);N_PINS(I)::R(J)+S(I)
      • P(b);OGATEB::B(C)
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