MESON Chess Problem Database

Problem Display
PID: 134708 (8/8/N3n2r/pP1kPQ1N/rRn1R3/8/1B2K2p/8 w - - 0 1)

Shire, David J

Problem Observer, 1997

8/8/N3n2r/pP1kPQ1N/rRn1R3/8/1B2K2p/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Sxf6#
    • 1...Rh7
      • 2.Sf6#
    • 1...Rh8
      • 2.Sf6#
    • 1...Sxe5
      • 2.Qxe5#
    • 1...Sd4+
      • 2.Rxd4#
    • 1...Sf4+
      • 2.Sxf4#
    • 1...Sc5
      • 2.Sf4#
      • 2.Sc7#
      • 2.Rd4#
    • 1...Sg5
      • 2.Sf4#
      • 2.Rd4#
    • 1...Sc7
      • 2.Sf4#
      • 2.Rd4#
    • 1...Sg7
      • 2.Sf4#
      • 2.Rd4#
    • 1...Sd8
      • 2.Sf4#
      • 2.Rd4#
    • 1...Sf8
      • 2.Sf4#
      • 2.Rd4#
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qb7#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Sxe5
        • 2.Red4#
      • 1...Rh7
        • 2.Sf6#
      • 1...Sd6
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(g);N_GUARD::S(H),XR(g)
    • R(g);N_GUARD::S(H)
    • S(c);OGATE,P_SPINS(c),XP(F)::QAR1(G),XS(c)
    • S(f);CHECK,N_GUARD::R1(D),XS(f)
    • S(f);CHECK,N_GUARD::S(H),XS(f)
  • Actual
    • Q(G);P_PINS(f)
    • Threat
      • QAB(G)
    • Vars
      • K(e);N_SPINS(f),OGATEB,P_SPINS(c),S_FLIGHT,XR(D)::QAB1(G)
      • S(c);SBLOCK,XP(F)::R1(D)
      • R(g);N_GUARD::S(H)
      • S(c);::S(H)
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Developed and maintained by Brian Stephenson.
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