MESON Chess Problem Database

Problem Display
PID: 185733 (4N1K1/1B1k1P2/8/4p1BQ/5n2/1bNp4/2p5/1qr2r2 w - - 0 1)

Sparke, Arthur M

British Chess Magazine, 1918

4N1K1/1B1k1P2/8/4p1BQ/5n2/1bNp4/2p5/1qr2r2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Bc8#
      • 2.Qg4#
    • 1...Ba4
      • 2.f8S#
    • 1...Bxf7+
      • 2.Qxf7#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sc5#
      • 1...Bxf7+
        • 2.Qxf7#
      • 1...Ke6
        • 2.Qg4#
      • 1...Se6!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sc5#
      • 1...Bxf7+
        • 2.Qxf7#
      • 1...Ke6
        • 2.Qg4#
      • 1...Bxa4
        • 2.f8S#
      • 1...Se6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(e);N_PINP(E)::P=S
    • B(e);CHECK,OGATE,XP(E)::QAR2(C),XB(e)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • B(e);CHECK,OGATE,XP(E)::QAR2(C),XB(e)
        • K(i);N_PINP(E),S_FLIGHT::QAB(C)
      • Refutation
        • S(g);N_PINP(E)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • B(e);CHECK,OGATE,XP(E)::QAR2(C),XB(e)
      • K(i);N_PINP(E),S_FLIGHT::QAB(C)
      • B(e);N_PINP(E),XS(A)::P=S
      • S(g);N_PINP(E),SBLOCK::S(A)
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