MESON Chess Problem Database

Problem Display
PID: 261636 (Q7/2P1Nn2/1PB2P2/5P1b/2RB1k1K/5p2/1P3p2/5n2 w - - 0 1)

Hermanson, Halvar

1st HM., Schweizerische Schachzeitung, 1973

Q7/2P1Nn2/1PB2P2/5P1b/2RB1k1K/5p2/1P3p2/5n2

#2

11 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qa3?
      • 1...Bg6
        • 2.Qxf3#
      • 1...Sd2
        • 2.Qe3#
      • 1...Sh2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sg3
        • 2.Qe3#
      • 1...Se5
        • 2.Be3#
      • 1...Sg5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sh6
        • 2.Qd6#
      • 1...Sd8
        • 2.Qd6#
      • 1...Sh8
        • 2.Qd6#
      • 1...Bg4!
    • 1.Qg8?
      • 1...Bg4
        • 2.Qxg4#
      • 1...Sd2
        • 2.Qg3#
      • 1...Sh2
        • 2.Qg3#
      • 1...Se3
        • 2.Qg3#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Se5
        • 2.Qg5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd6
        • 2.Qg5#
      • 1...Sh6
        • 2.Qg5#
      • 1...Sd8
        • 2.Qg5#
      • 1...Sh8
        • 2.Qg5#
      • 1...Bg6!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Bxf2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Se3
        • 2.Be5#
      • 1...Sg3
        • 2.Qd2#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sg5
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(K);
      • Vars
        • B(e);N_GUARD::QAR1(K),XP(c)
        • S(a);N_GUARD::QAB1(K)
        • S(a);N_GUARD::QAB1(K),XS(a)
        • S(f);SBLOCK::R(B)+B(C),DCHECK
        • S(f);N_GUARD::QAB(K)
        • S(f);N_GUARD::QAB(K),XS(f)
      • Refutation
        • B(e);
    • Try
      • Q(K);
      • Vars
        • B(e);N_GUARD::QAR1(K),XB(e)
        • S(a);N_GUARD::QAB1(K)
        • S(a);N_GUARD::QAB1(K),XS(a)
        • S(f);N_GUARD::QAB1(K)
        • S(f);N_GUARD::QAB1(K),XS(f)
      • Refutation
        • B(e);
  • Actual
    • Q(K);
    • Threat
      • R(B)+B(C),XP(b)
    • Vars
      • S(a);N_GUARD::QAB(K),XS(a)
      • S(a);SBLOCK::R(B)+B(C),DCHECK
      • S(a);N_GUARD::QAB(K)
      • S(f);N_GUARD::QAB1(K),XS(f)
      • S(f);N_GUARD::QAB1(K)
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