MESON Chess Problem Database

Problem Display
PID: 278188 (3QRb2/K3nppb/5p2/3n3N/R2PkP2/B6B/3PPp2/8 w - - 0 1)

Shire, David J

Phenix, 2007

3QRb2/K3nppb/5p2/3n3N/R2PkP2/B6B/3PPp2/8

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Bg2#
    • 1...Se3
      • 2.d3#
    • 1...Sxf4
      • 2.Sg3#
    • 1...Sc7
      • 2.d5#
    • 1...f5
      • 2.Bg2#
  • Tries
    • 1.Bc1?
      • threat
        • 2.d3#
      • 1...Sxf4
        • 2.Sg3#
      • 1...Sb4!
    • 1.Rxe7+?
      • 1...Sxe7
        • 2.d5#
      • 1...Bxe7!
  • Keys
    • 1.Ra5!
      • threat
        • 2.Qxd5#
      • 1...Kxd4
        • 2.Ra4#
      • 1...Sxf4
        • 2.Sg3#
      • 1...Sc3
        • 2.Bg2#
      • 1...Se3
        • 2.d3#
      • 1...Sb4
        • 2.Bg2#
      • 1...Sb6
        • 2.Bg2#
      • 1...Sc7
        • 2.Bg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(h);SBLOCK::B(D)
    • S(c);SBLOCK::P(A)
    • S(c);SBLOCK,XP(G)::S(H)
    • S(c);OGATE::R(E)+P(F)
    • P(d);SBLOCK::B(D)
  • Tries
    • Try
      • B(C);
      • Threat
        • P(A)
      • Vars
        • S(c);SBLOCK,XP(G)::S(H)
      • Refutation
        • S(c);
    • Try
      • R(K);CHECK,XS(e)
      • Vars
        • S(c);OGATE,XR(K)::R(E)+P(F)
      • Refutation
        • B(i);XR(K)
  • Actual
    • R(E);
    • Threat
      • QAB1(J),XS(c)
    • Vars
      • K(b);N_SPINS(e),OGATEB,P-FLIGHT,P_SPINS(c),XP(F)::R(E)
      • S(c);SBLOCK,XP(G)::S(H)
      • S(c);::B(D)
      • S(c);SBLOCK::P(A)
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