MESON Chess Problem Database

Problem Display
PID: 238106 (2KB4/3p4/B1pQ2p1/p1RNnP2/q3k2r/2P3rp/5P1N/8 w - - 0 1)

Hermanson, Halvar

Szachy, 1958

2KB4/3p4/B1pQ2p1/p1RNnP2/q3k2r/2P3rp/5P1N/8

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Sf6#
    • 1...Sf3
      • 2.Sf6#
    • 1...Sc4
      • 2.Sf6#
    • 1...Sg4
      • 2.Qf4#
    • 1...Sf7
      • 2.Sf6#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qxe5#
      • 1...Kf4
        • 2.Qxe5#
      • 1...Qb5
        • 2.Qd4#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Sd3
        • 2.Bxd3#
      • 1...Sf3
        • 2.Bd3#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sg4
        • 2.Bd3#
      • 1...Sf7
        • 2.Bd3#
      • 1...Qc4!
    • 1.Sf6+?
      • 1...Kxf5
        • 2.Qxe5#
      • 1...Kf4!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qxe5#
      • 1...Kf4
        • 2.Qxe5#
      • 1...Kxf5
        • 2.Qxe5#
      • 1...Sd3
        • 2.Qd4#
      • 1...Sf3
        • 2.Bd3#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sg4
        • 2.Qd4#
      • 1...Sf7
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(g);::S(E)
    • S(g);OGATE::QAR1(H)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(H),XS(g)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(g)::QAB1(H),XS(g)
        • Q(c);N_GUARD::QAR1(H)
        • Q(c);N_GUARD::QAR1(H),XQ(c)
        • S(g);N_GUARD::B(G),XS(g)
        • S(g);N_GUARD::B(G)
        • S(g);S_CUTQ(c)::QAR1(H)
      • Refutation
        • Q(c);
    • Try
      • S(E);CHECK
      • Vars
        • K(d);P_SPINS(g),S_FLIGHT,XP(F)::QAR1(H),XS(g)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(g)
  • Actual
    • S(E);
    • Threat
      • QAR1(H),XS(g)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(g)::QAB1(H),XS(g)
      • K(d);P_SPINS(g),S_FLIGHT,XP(F)::QAR1(H),XS(g)
      • S(g);::QAR1(H)
      • S(g);N_GUARD,S_CUTR(a)::B(G)
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