MESON Chess Problem Database

Problem Display
PID: 114827 (B1r1R3/8/N1q1P3/2Nk4/6p1/1P2PPB1/KnP5/n7 w - - 0 1)

Andrade, Barry Jack da Costa

Ilford Recorder, 1958

B1r1R3/8/N1q1P3/2Nk4/6p1/1P2PPB1/KnP5/n7

#2

11 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8
      • 2.Rxd8#
    • 1...Sd1
      • 2.c4#
    • 1...Sd3
      • 2.c4#
    • 1...Sa4
      • 2.c4#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sb4#
        • 2.Sb6#
        • 2.Sf6#
      • 1...Rxa8
        • 2.Sf6#
      • 1...Rxe8
        • 2.Sc7#
      • 1...Sxc2
        • 2.Sb6#
        • 2.Sf6#
      • 1...Sxb3
        • 2.Sb6#
      • 1...gxf3
        • 2.Sf6#
      • 1...Qb7
        • 2.Sb4#
      • 1...Rb8
        • 2.Sc7#
        • 2.Sf6#
      • 1...Sd3
        • 2.Sb6#
        • 2.Sf6#
        • 2.c4#
      • 1...Sa4
        • 2.Sb4#
        • 2.Sf6#
        • 2.c4#
      • 1...Sc4
        • 2.Sb4#
        • 2.Sf6#
      • 1...Qxa8!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sc3#
        • 2.Sb6#
        • 2.Sb4#
      • 1...Qxa8
        • 2.Sb4#
      • 1...Rxa8
        • 2.Sb4#
      • 1...Rxe8
        • 2.Sc7#
      • 1...Sxc2
        • 2.Sc3#
        • 2.Sb6#
      • 1...Sxb3
        • 2.Sb6#
      • 1...Sxa4
        • 2.c4#
      • 1...gxf3
        • 2.Sc3#
      • 1...Qb7
        • 2.Sb4#
      • 1...Rb8
        • 2.Sc3#
        • 2.Sc7#
      • 1...Sd1
        • 2.Sb6#
        • 2.Sb4#
        • 2.c4#
      • 1...Sd3
        • 2.Sc3#
        • 2.Sb6#
        • 2.c4#
      • 1...Sc4
        • 2.Sc3#
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD::R(K),XR(f)
    • S(b);N_GUARD::P(B)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(3)
      • Vars
        • R(f);N_SPINQ(e),P_PINS(H),XB(J)::S(G)
        • R(f);N_GUARD,XR(K)::S(H)
        • S(a);XP(C)::S(G)
        • P(c);XP(E)::S(G)
        • Q(e);::S(H)
      • Refutation
        • Q(e);N_SPINQ(e),P_PINS(H),XB(J)
  • Actual
    • S(G);
    • Threat
      • DUALS(3)
    • Vars
      • Q(e);N_SPINQ(e),XB(J)::S(H)
      • R(f);N_SPINQ(e),XB(J)::S(H)
      • R(f);N_GUARD,XR(K)::S(H)
      • S(a);XP(C)::S(G)
      • S(b);N_GUARD,XS(G)::P(B)
      • P(c);XP(E)::S(G)
      • Q(e);::S(H)
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