MESON Chess Problem Database

Problem Display
PID: 137365 (1B6/pQ3n2/1n1pp3/K2Nk2N/2p5/2P5/4P3/1B3br1 w - - 0 1)

Ellerman, Arnoldo

Sachove umeni (Ceskoslovensky sach), 1964

1B6/pQ3n2/1n1pp3/K2Nk2N/2p5/2P5/4P3/1B3br1

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...exd5
      • 2.Qe7#
  • Tries
    • 1.Sdf4?
      • threat
        • 2.Qe4#
      • 1...Bg2
        • 2.Sg6#
      • 1...Sg5
        • 2.Sg6#
        • 2.Qg7#
      • 1...Sd5!
    • 1.Sxb6?
      • threat
        • 2.Sxc4#
        • 2.Sd7#
        • 2.Qe4#
      • 1...Bxe2
        • 2.Sd7#
        • 2.Qe4#
      • 1...Rg4
        • 2.Sd7#
      • 1...Bg2
        • 2.Sxc4#
        • 2.Sd7#
      • 1...Sg5
        • 2.Sxc4#
        • 2.Sd7#
        • 2.Qg7#
      • 1...axb6+!
    • 1.Sdf6?
      • threat
        • 2.Qe4#
      • 1...Rg4
        • 2.Sxg4#
      • 1...Bg2
        • 2.Sg4#
      • 1...Sd5
        • 2.Sd7#
      • 1...Sg5!
    • 1.Se7?
      • threat
        • 2.Qe4#
      • 1...Bg2
        • 2.Sg6#
      • 1...Sd5
        • 2.Sc6#
      • 1...Sg5
        • 2.Sg6#
      • 1...Rg4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qe4#
      • 1...Rg4
        • 2.Sxg4#
      • 1...Bg2
        • 2.Sg4#
      • 1...Sd5
        • 2.Sxc4#
      • 1...Sg5
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(g);OGATEB,SBLOCK,XS(E)::QAR2(G)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(G)
      • Vars
        • B(a);S_CUTR(b)::S(E)
      • Refutation
        • S(e);
    • Try
      • S(E);XS(e)
      • Threat
        • DUALS(3)
      • Vars
        • R(b);::S(E)
      • Refutation
        • P(h);CHECK,XS(E)
    • Try
      • S(E);
      • Threat
        • QAR1(G)
      • Vars
        • R(b);N_GUARD::S(E),XR(b)
        • B(a);S_CUTR(b)::S(E)
        • S(e);N_GUARD::S(E)
      • Refutation
        • S(i);
    • Try
      • S(E);
      • Threat
        • QAR1(G)
      • Vars
        • B(a);S_CUTR(b)::S(E)
        • S(e);SBLOCK::S(E)
        • S(i);S_CUTR(b)::S(E)
      • Refutation
        • R(b);
  • Actual
    • S(E);
    • Threat
      • QAR1(G)
    • Vars
      • R(b);N_GUARD::S(E),XR(b)
      • B(a);S_CUTR(b)::S(E)
      • S(e);N_GUARD::S(E),XP(c)
      • S(i);OGATE::QAB(G)
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