MESON Chess Problem Database

Problem Display
PID: 238103 (4B3/1p4p1/nR1NPP2/3k4/1p4N1/1pp1P2p/Q7/5K2 w - - 0 1)

Hermanson, Halvar

Schweizerische Arbeiter Schachzeitung, 1957

4B3/1p4p1/nR1NPP2/3k4/1p4N1/1pp1P2p/Q7/5K2

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qa5#
    • 1...Kxe6
      • 2.Qxb3#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qf5#
      • 1...Kc5
        • 2.e4#
      • 1...Kxe6
        • 2.Qf5#
      • 1...g6!
    • 1.Qh2?
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Rb5#
      • 1...Kxe6
        • 2.Qe5#
      • 1...gxf6!
    • 1.Qa5+?
      • 1...Kxe6
        • 2.Sc4#
        • 2.Se4#
        • 2.Sf5#
        • 2.Sxb7#
        • 2.Sf7#
        • 2.Sc8#
        • 2.Qe5#
        • 2.Qf5#
      • 1...Sc5!
    • 1.Qxa6?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Rb5#
        • 2.Qb5#
        • 2.Qa5#
      • 1...Kxe6
        • 2.Qc4#
      • 1...bxa6!
    • 1.e4+?
      • 1...Kc5
        • 2.Qf2#
      • 1...Kxe6
        • 2.Sc4#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sxb7#
        • 2.Sf7#
        • 2.Sc8#
        • 2.Qxb3#
      • 1...Kd4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qb5#
      • 1...Kxe6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINP(a),P-FLIGHT::QAR2(B)
    • K(e);S_FLIGHT,XP(G)::QAB(B),XP(a)
  • Tries
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAR2(B)
      • Vars
        • K(e);P-FLIGHT::QAB(B)+P(C)
        • K(e);S_FLIGHT,XP(G)::QAB1(B)
      • Refutation
        • P(h);
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAR1(B)
      • Vars
        • K(e);P-FLIGHT::R1(E)
        • K(e);S_FLIGHT,XP(G)::QAR1(B)
      • Refutation
        • P(h);XP(H)
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • Q(B);N_PINP(a),XS(f)
      • Threat
        • QAB1(B)
      • Vars
        • K(e);S_FLIGHT,XP(G)::QAB(B)
      • Refutation
        • P(g);XQ(B)
    • Try
      • P(C);CHECK
      • Vars
        • K(e);N_SPINP(a),P-FLIGHT::QAB(B)
      • Refutation
        • K(e);N_SPINP(a),P-FLIGHT
  • Actual
    • Q(B);N_PINP(a)
    • Threat
      • QAB1(B)
    • Vars
      • K(e);P-FLIGHT::QAR1(B)
      • K(e);S_FLIGHT,XP(G)::QAB(B)
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