MESON Chess Problem Database

Problem Display
PID: 143395 (q3Q3/R2P2PP/1N2bk1B/3p3p/3KP3/3N4/4p1rr/8 w - - 0 1)

Ellerman, Arnoldo

Good Companions (July), 1917

q3Q3/R2P2PP/1N2bk1B/3p3p/3KP3/3N4/4p1rr/8

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.d8Q#
      • 2.d8B#
    • 1...Bg4
      • 2.g8S#
    • 1...Bf5
      • 2.e5#
    • 1...Bxd7
      • 2.Sxd7#
    • 1...Bg8
      • 2.hxg8S#
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qxe6#
      • 1...Qxe8
        • 2.dxe8S#
      • 1...Bxd7
        • 2.Sxd7#
      • 1...Qc6
        • 2.d8Q#
        • 2.d8B#
      • 1...Bh3
        • 2.Sxh5#
      • 1...Bg4
        • 2.g8S#
      • 1...Bf5
        • 2.e5#
      • 1...Bf7
        • 2.Qe5#
      • 1...Bg8
        • 2.hxg8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(h);N_GUARD::P=Q
    • B(f);N_GUARD,S_CUTR(b)::P=S
    • B(f);SBLOCK::P(C)
    • B(f);XP(G)::S(D),XB(f)
    • B(f);OGATE::PXB(f)=S
  • Actual
    • S(A);
    • Threat
      • QAR1(J),XB(f)
    • Vars
      • Q(h);OGATE,XQ(J)::PXQ(h)=S
      • B(f);XP(G)::S(D),XB(f)
      • Q(h);N_GUARD::P=Q
      • B(f);S_CUTR(c)::S(A),XP(e)
      • B(f);N_GUARD,S_CUTR(b)::P=S
      • B(f);SBLOCK::P(C)
      • B(f);OGATE,SBLOCK::QAB1(J)
      • B(f);OGATE::PXB(f)=S
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