MESON Chess Problem Database

Problem Display
PID: 34 (8/1p3NN1/1P2p3/2QpP3/4kp2/7P/2P2P2/5K2 w - - 0 1)

Hermanson, Halvar

1st Prize, Lulea Congress, 1930

8/1p3NN1/1P2p3/2QpP3/4kp2/7P/2P2P2/5K2

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Sg5#
    • 1...f3
      • 2.Qe3#
    • 1...d4
      • 2.Sg5#
  • Tries
    • 1.Ke1?
      • 1...f3
        • 2.Qe3#
      • 1...d4
        • 2.Sg5#
      • 1...Kf3!
    • 1.Kg1?
      • 1...f3
        • 2.Qe3#
      • 1...d4
        • 2.Sg5#
      • 1...Kf3!
    • 1.Kg2?
      • threat
        • 2.f3#
      • 1...d4
        • 2.Sg5#
        • 2.Sd6#
      • 1...f3+!
    • 1.Sd6+?
      • 1...Kf3
        • 2.Qa3#
        • 2.Qc3#
      • 1...Kxe5!
    • 1.Qa3?
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qb4#
      • 1...f3
        • 2.Qe3#
      • 1...d4!
    • 1.Qb4+?
      • 1...Kf3
        • 2.Sg5#
      • 1...d4!
    • 1.Qd4+?
      • 1...Kf3
        • 2.Sg5#
        • 2.Qd3#
      • 1...Kxd4!
    • 1.Qd6?
      • 1...Kf3
        • 2.Sg5#
      • 1...Kd4
        • 2.Qb4#
      • 1...d4
        • 2.Sg5#
      • 1...f3!
    • 1.Qc3?
      • threat
        • 2.Sg5#
        • 2.Sd6#
        • 2.Qd3#
        • 2.f3#
      • 1...f3
        • 2.Qe3#
      • 1...d4!
    • 1.Qa5?
      • 1...Kf3
        • 2.Sg5#
      • 1...Kd4
        • 2.Qb4#
      • 1...d4
        • 2.Sg5#
      • 1...f3!
    • 1.Qb5?
      • threat
        • 2.Qd3#
      • 1...Kf3
        • 2.Sg5#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Kd4
        • 2.Qb4#
      • 1...d4
        • 2.Sg5#
      • 1...f3!
    • 1.h4?
      • 1...f3
        • 2.Qe3#
      • 1...d4
        • 2.Sg5#
      • 1...Kf3!
  • Keys
    • 1.Qe7!
      • 1...Kf3
        • 2.Sg5#
      • 1...Kd4
        • 2.Qb4#
      • 1...f3
        • 2.Qh4#
      • 1...d4
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::S(H)
    • P(b);N_GUARD::QAR1(E)
    • P(c);::S(H)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(b);N_GUARD::QAR1(E)
        • P(c);::S(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(b);N_GUARD::QAR1(E)
        • P(c);::S(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Threat
        • P(C)
      • Refutation
        • P(b);CHECK
    • Try
      • S(H);CHECK
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c),XP(F)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • P(b);N_GUARD::QAR1(E)
      • Refutation
        • P(c);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::S(H)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::S(H)
        • K(a);P-FLIGHT,P_SPINP(c)::QAR2(E)
        • P(c);::S(H)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Threat
        • DUALS(4)
      • Vars
        • P(b);N_GUARD::QAR1(E)
      • Refutation
        • P(c);
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::S(H)
        • K(a);P-FLIGHT::QAR2(E)
        • P(c);SBLOCK::S(H)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • P(c);SBLOCK::S(H)
      • Refutation
        • P(b);
    • Try
      • P(D);
      • Vars
        • P(b);N_GUARD::QAR1(E)
        • P(c);::S(H)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::S(H)
      • K(a);P-FLIGHT::QAR2(E)
      • P(b);OGATEB,SBLOCK::QAR(E)
      • P(c);OGATEB,SBLOCK::QAB(E),XP(e)
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