MESON Chess Problem Database

Problem Display
PID: 182724 (1K2n3/B7/k3N3/3p4/1PP1n2P/8/2B2p1R/4R1r1 w - - 0 1)

Howard, David M

Problem Observer, 2015

1K2n3/B7/k3N3/3p4/1PP1n2P/8/2B2p1R/4R1r1

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Ra1#
    • 1...Rg4
      • 2.Ra1#
    • 1...Rg5
      • 2.Ra1#
    • 1...Rg6
      • 2.Ra1#
    • 1...Rg7
      • 2.Ra1#
    • 1...Rg8
      • 2.Ra1#
    • 1...Sd2
      • 2.Sc5#
    • 1...Sc3
      • 2.Sc5#
    • 1...Sg3
      • 2.Sc5#
    • 1...Sc5
      • 2.Sxc5#
    • 1...Sg5
      • 2.Sc5#
    • 1...S4d6
      • 2.Sc5#
    • 1...S4f6
      • 2.Sc5#
    • 1...S8d6
      • 2.Sc7#
    • 1...S8f6
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
    • 1...Sg7
      • 2.Sc7#
    • 1...f1S
      • 2.Ra1#
    • 1...f1B
      • 2.Ra1#
  • Tries
    • 1.Ba4?
      • threat
        • 2.Bb5#
      • 1...Sc3
        • 2.Sc5#
      • 1...S4d6
        • 2.Sc5#
      • 1...S8d6
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...dxc4!
  • Keys
    • 1.Bd3!
      • threat
        • 2.cxd5#
        • 2.c5#
      • 1...fxe1S
        • 2.Ra2#
      • 1...dxc4
        • 2.Bxc4#
      • 1...f1Q
        • 2.Ra2#
      • 1...f1B
        • 2.Ra1#
        • 2.Ra2#
      • 1...Rg3
        • 2.Ra1#
      • 1...Sd2
        • 2.Sc5#
      • 1...Sc3
        • 2.Sc5#
      • 1...Sc5
        • 2.Sxc5#
      • 1...S4d6
        • 2.Sc5#
      • 1...S8d6
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...d4
        • 2.c5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 13
  • Sets
    • R(a);N_GUARD::R(A)
    • S(c);N_GUARD::S(G)
    • S(c);N_GUARD::S(G),XS(c)
    • S(f);N_GUARD::S(G)
    • S(f);N_GUARD::S(G),XS(f)
    • P(b);S_CUTR(a)::R(A)
  • Tries
    • Try
      • B(B);
      • Threat
        • B(B)
      • Vars
        • S(c);N_GUARD::S(G)
        • S(f);N_GUARD::S(G)
        • S(f);N_GUARD::S(G),XS(f)
      • Refutation
        • P(d);XP(E)
  • Actual
    • B(B);
    • Threat
      • DUALS(2)
    • Vars
      • P(b);OGATE,XR(A)::R(C)
      • P(d);OGATE,P_SPINP(d),XP(E)::B(B),XP(d)
      • P(b);OGATE::R(C)
      • R(a);N_GUARD::R(A)
      • S(c);N_GUARD::S(G)
      • S(c);N_GUARD::S(G),XS(c)
      • S(f);N_GUARD::S(G)
      • S(f);N_GUARD::S(G),XS(f)
      • P(d);::B(B)+P(E)
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