MESON Chess Problem Database

Problem Display
PID: 116350 (8/8/1Qq5/1npb4/N1k5/R3rN2/1BP1p3/4K3 w - - 0 1)

Hermanson, Halvar

Boletim da UBP, 1963

8/8/1Qq5/1npb4/N1k5/R3rN2/1BP1p3/4K3

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Qxc5#
    • 1...Qd7
      • 2.Qxc5#
    • 1...Qa8
      • 2.Qxc5#
    • 1...Qe8
      • 2.Qxc5#
    • 1...Qe6
      • 2.Qxc5#
    • 1...Qf6
      • 2.Qxc5#
    • 1...Qg6
      • 2.Qxc5#
    • 1...Qh6
      • 2.Qxc5#
    • 1...Sxa3
      • 2.Sd2#
    • 1...Sc3
      • 2.Qb3#
    • 1...Sd4
      • 2.Sd2#
    • 1...Sd6
      • 2.Sd2#
    • 1...Sa7
      • 2.Sd2#
    • 1...Sc7
      • 2.Sd2#
  • Keys
    • 1.Sc3!
      • threat
        • 2.Ra4#
      • 1...Kb4
        • 2.Ra4#
      • 1...Sxa3
        • 2.Qb3#
      • 1...Sxc3
        • 2.Qb3#
      • 1...Qa8
        • 2.Qxb5#
      • 1...Sd4
        • 2.Sd2#
      • 1...Sd6
        • 2.Qb3#
      • 1...Sa7
        • 2.Qb3#
      • 1...Sc7
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD::QAR1(G),XP(e)
    • S(d);XR(D)::S(E)
    • S(d);OGATE::QAB1(G)
    • S(d);::S(E)
  • Actual
    • S(F);
    • Threat
      • R(D)
    • Vars
      • K(c);P-FLIGHT,P_SPINS(d)::R1(D)
      • S(d);OGATE,XR(D)::QAB1(G)
      • S(d);OGATE,XS(F)::QAB1(G)
      • Q(g);N_GUARD::QAB1(G),XS(d)
      • S(d);SBLOCK::S(E)
      • S(d);OGATE::QAB1(G)
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