MESON Chess Problem Database

Problem Display
PID: 89724 (4NrB1/5P2/3P4/3k1p2/1p1P1p2/5K2/2P1N3/Q7 w - - 0 1)

Svejda, Josef

Zlata Praha, 1888

4NrB1/5P2/3P4/3k1p2/1p1P1p2/5K2/2P1N3/Q7

#2

9 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qa6?
      • threat
        • 2.Sc7#
      • 1...Rxe8
        • 2.fxe8Q#
        • 2.fxe8S#
        • 2.fxe8B#
        • 2.fxe8R#
      • 1...Ke6!
    • 1.Qa8+?
      • 1...Kc4
        • 2.Qc6#
      • 1...Ke6!
  • Keys
    • 1.Qa4!
      • 1...Kc4
        • 2.Qc6#
      • 1...Ke6
        • 2.Sxf4#
      • 1...Rxf7
        • 2.Bxf7#
      • 1...Rxe8
        • 2.fxe8S#
      • 1...Rxg8
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...b3
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • S(H)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);P_SPINP(a),S_FLIGHT::QAR2(A)
      • K(c);S_FLIGHT::S(C),XP(b)
      • R(e);OGATE,P_SPINR(e),XP(G)::B(I),XR(e)
      • R(e);OGATE,XS(H)::PXR(e)=S
      • R(e);OGATE,XB(I)::PXR(e)=Q
      • P(a);::S(C),XP(b)
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