MESON Chess Problem Database

Problem Display
PID: 162979 (5N2/2Bpr3/p2p1b1n/r3k3/5Rq1/5pP1/b1B2N1Q/R3K3 w Q - 0 1)

Pitkanen, Jorma

Best Problems, 2012

5N2/2Bpr3/p2p1b1n/r3k3/5Rq1/5pP1/b1B2N1Q/R3K3

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Rxa5#
    • 1...Bd5
      • 2.Sd3#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Bxd6#
      • 1...Qe6
        • 2.Sg6#
      • 1...Re6
        • 2.Sxd7#
      • 1...Bd5
        • 2.Sd3#
      • 1...Sf5
        • 2.Sxg4#
      • 1...Sf7
        • 2.Sxg4#
      • 1...Rd5!
  • Keys
    • 1.0-0-0!
      • threat
        • 2.Bxd6#
      • 1...Qxf4+
        • 2.gxf4#
      • 1...Qe6
        • 2.Sg6#
      • 1...Rd5
        • 2.Re1#
      • 1...Re6
        • 2.Sxd7#
      • 1...Bd5
        • 2.Sd3#
      • 1...Sf5
        • 2.Sxg4#
      • 1...Sf7
        • 2.Sxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(a);OGATE::R(A),XR(d)
    • B(a);SBLOCK::S(D)
  • Tries
    • Try
      • R(A);
      • Threat
        • B(H),XP(g)
      • Vars
        • Q(c);N_GUARD,SBLOCK::S(I)
        • R(k);N_GUARD,SBLOCK,S_CUTQ(c)::S(I),XP(j)
        • B(a);SBLOCK::S(D)
        • S(i);N_GUARD::S(D),XQ(c)
      • Refutation
        • R(d);
  • Actual
    • K(B);0-0-0
    • Threat
      • B(H),XP(g)
    • Vars
      • Q(c);CHECK,OGATE,XR(G)::P(F),XQ(c)
      • Q(c);N_GUARD,SBLOCK::S(I)
      • R(d);SBLOCK::R(A)
      • R(k);N_GUARD,SBLOCK,S_CUTQ(c)::S(I),XP(j)
      • B(a);SBLOCK::S(D)
      • S(i);N_GUARD::S(D),XQ(c)
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