MESON Chess Problem Database

Problem Display
PID: 167183 (1nK5/4R1Rn/2P2k2/rQ5p/3PP2P/b3pN2/pq6/8 w - - 0 1)

Barnes, Barry Peter

The Problemist, 2017

1nK5/4R1Rn/2P2k2/rQ5p/3PP2P/b3pN2/pq6/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Qe5#
      • 2.Qf5#
    • 1...Ra6
      • 2.Qe5#
      • 2.Qf5#
    • 1...Ra7
      • 2.Qe5#
      • 2.Qf5#
    • 1...Ra8
      • 2.Qe5#
      • 2.Qf5#
    • 1...Sg5
      • 2.hxg5#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sxh7#
        • 2.Ref7#
      • 1...Sxg5
        • 2.hxg5#
      • 1...Qb3
        • 2.Sxh7#
      • 1...Ra7
        • 2.Sxh7#
        • 2.Qe5#
        • 2.Qf5#
      • 1...Sf8
        • 2.Ref7#
      • 1...Bxe7!
    • 1.d5?
      • threat
        • 2.Ref7#
      • 1...Bxe7
        • 2.Qxb2#
      • 1...Sg5
        • 2.hxg5#
      • 1...Ra7!
  • Keys
    • 1.Se5!
      • threat
        • 2.Rgf7#
      • 1...Bxe7
        • 2.Rg6#
      • 1...Qb3
        • 2.Qf1#
      • 1...Sg5
        • 2.hxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(h);OGATE::P(D),XS(h)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(h);OGATE,XS(A)::P(D),XS(h)
        • Q(b);::S(A),XS(h)
        • S(h);::R1(G)
      • Refutation
        • B(c);XR(G)
    • Try
      • P(B);
      • Threat
        • R1(G)
      • Vars
        • B(c);N_GUARD,XR(G)::QAB(E),XQ(b)
        • S(h);OGATE::P(D),XS(h)
      • Refutation
        • R(e);
  • Actual
    • S(A);
    • Threat
      • R1(H)
    • Vars
      • B(c);SBLOCK,XR(G)::R1(H)
      • Q(b);N_GUARD::QAR(E)
      • S(h);OGATE::P(D),XS(h)
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