MESON Chess Problem Database

Problem Display
PID: 132823 (1KNBR3/8/1N2b3/2p1kp2/1Rn1B1P1/2P3P1/4P3/5r2 w - - 0 1)

Brown, David Leo

Sinfonie Scacchistiche, 1980

1KNBR3/8/1N2b3/2p1kp2/1Rn1B1P1/2P3P1/4P3/5r2

#2

11 + 6

788 US Problem Bulletin 1985

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Rxe6#
    • 1...Sb2
      • 2.Sd7#
    • 1...Sd2
      • 2.Sd7#
    • 1...Sa3
      • 2.Sd7#
    • 1...Se3
      • 2.Sd7#
    • 1...Sa5
      • 2.Sd7#
    • 1...Sd6
      • 2.Sd7#
  • Tries
    • 1.Bf6+?
      • 1...Kxe4
        • 2.Rxe6#
      • 1...Kxf6!
    • 1.Bc7+?
      • 1...Kxe4
        • 2.Rxe6#
      • 1...Sd6
        • 2.Sd7#
      • 1...Kf6!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sbxc4#
      • 1...Kxd6
        • 2.Bc7#
      • 1...Sxb6
        • 2.Sf7#
      • 1...Sxd6
        • 2.Sd7#
      • 1...fxe4
        • 2.Sdxc4#
      • 1...Sb2
        • 2.Sf7#
      • 1...Sd2
        • 2.Sf7#
      • 1...Sa3
        • 2.Sf7#
      • 1...Se3
        • 2.Sf7#
      • 1...Sa5
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(d);P-FLIGHT,P_SPINS(b),XB(E)::R(K),XB(f)
    • S(b);::S(G)
  • Tries
    • Try
      • B(J);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(b),XB(E)::R(K),XB(f)
      • Refutation
        • K(d);N_SPINB(f),S_FLIGHT,XB(J)
    • Try
      • B(J);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(b),XB(E)::R(K),XB(f)
        • S(b);P_SPINS(b)::S(G)
      • Refutation
        • K(d);N_SPINB(f),S_FLIGHT
  • Actual
    • S(I);
    • Threat
      • S(G),XS(b)
    • Vars
      • K(d);N_SPINB(f),OGATEB,S_FLIGHT,XS(I)::B(J)
      • S(b);XS(G)::S(I)
      • S(b);SBLOCK,XS(I)::S(G)
      • P(e);SBLOCK,XB(E)::S(I),XS(b)
      • S(b);::S(I)
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