MESON Chess Problem Database

Problem Display
PID: 60010 (6r1/3Q2p1/4P1K1/2P1kB2/2n2pR1/r2p4/3p2N1/bnq5 w - - 0 1)

Hjelle, David

Sp. Prize, Vecherni Alma-Ata, 1968

6r1/3Q2p1/4P1K1/2P1kB2/2n2pR1/r2p4/3p2N1/bnq5

#2

7 + 11

3751 FIDE Album (1968-1970) 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qd6#
    • 1...Se3
      • 2.Qd6#
    • 1...Sa5
      • 2.Qd6#
    • 1...Sb6
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...f3
      • 2.Re4#
  • Tries
    • 1.Sxf4?
      • threat
        • 2.Qd5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Rd8
        • 2.Qxg7#
      • 1...Sc3
        • 2.Sxd3#
      • 1...Se3
        • 2.Qd6#
      • 1...Sb6
        • 2.Qd6#
      • 1...Qh1!
    • 1.Rxf4?
      • threat
        • 2.Re4#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sc3
        • 2.Qd4#
      • 1...Qe1!
    • 1.Rg5?
      • threat
        • 2.Bxd3#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Se3
        • 2.Qd6#
      • 1...Rf8!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qd5#
      • 1...Sxe3
        • 2.Qd6#
      • 1...fxe3
        • 2.Re4#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Qh1
        • 2.Sxc4#
      • 1...Rd8
        • 2.Qxg7#
      • 1...Sc3
        • 2.Sxc4#
      • 1...Sb6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(g);N_GUARD::QAB1(G)
    • S(g);N_GUARD::QAB1(G),XS(g)
    • P(h);OGATE::R1(B)
  • Tries
    • Try
      • S(A);XP(h)
      • Threat
        • QAR1(G)
      • Vars
        • S(g);N_GUARD::QAB1(G),XS(g)
        • R(k);N_GUARD::QAB(G),XP(j)
        • S(b);S_CUTR(e)::S(A),XP(f)
        • S(g);N_GUARD::QAB1(G)
      • Refutation
        • Q(c);
    • Try
      • R(B);XP(h)
      • Threat
        • R1(B)
      • Vars
        • S(g);N_GUARD::QAB1(G),XS(g)
        • S(b);S_CUTB(a)::QAB1(G)
      • Refutation
        • Q(c);
    • Try
      • R(B);
      • Threat
        • R(B)+B(D),XP(f)
      • Vars
        • S(g);N_GUARD::QAB1(G),XS(g)
        • S(g);N_GUARD::QAB1(G)
      • Refutation
        • R(k);
  • Actual
    • S(A);
    • Threat
      • QAR1(G)
    • Vars
      • S(g);N_GUARD,XS(A)::QAB1(G)
      • P(h);OGATE,XS(A)::R1(B)
      • S(g);N_GUARD::QAB1(G),XS(g)
      • Q(c);N_GUARD::S(A),XS(g)
      • R(k);N_GUARD::QAB(G),XP(j)
      • S(b);S_CUTQ(c)::S(A),XS(g)
      • S(g);N_GUARD::QAB1(G)
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