MESON Chess Problem Database

Problem Display
PID: 226635 (8/1n4Br/2p2R2/2p1k1P1/R3P3/1Q2p1bq/nN4p1/Kb6 w - - 0 1)

Hermanson, Halvar

Deutsche Schachzeitung, 1966

8/1n4Br/2p2R2/2p1k1P1/R3P3/1Q2p1bq/nN4p1/Kb6

#2

8 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Qxe6#
    • 1...Qh1
      • 2.Qe6#
    • 1...Qh2
      • 2.Qe6#
    • 1...Qh4
      • 2.Qe6#
    • 1...Qh5
      • 2.Qe6#
    • 1...Qh6
      • 2.Qe6#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Bf4
      • 2.Re6#
    • 1...Sc1
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sa5
      • 2.Qb8#
    • 1...Sd6
      • 2.Rf5#
    • 1...Sd8
      • 2.Qb8#
  • Tries
    • 1.Sc4+?
      • 1...Kd4
        • 2.Qxe3#
      • 1...Kxe4!
    • 1.Qd3?
      • threat
        • 2.Sc4#
      • 1...Bxd3
        • 2.Sxd3#
      • 1...Qe6
        • 2.Rf5#
      • 1...Sa5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...c4
        • 2.Sxc4#
      • 1...Qf5!
  • Keys
    • 1.Qxe3!
      • threat
        • 2.Sc4#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...Qe6
        • 2.Qxg3#
      • 1...Bd3
        • 2.Sxd3#
      • 1...Sa5
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qxc5#
      • 1...c4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(f);N_GUARD::QAR1(C),XQ(f)
    • Q(f);N_GUARD::QAR1(C)
    • B(a);N_GUARD::S(B),XB(a)
    • B(e);SBLOCK::B(H)+R(G),DCHECK
    • S(b);N_GUARD::QAB(C)
    • S(b);N_GUARD::QAB(C),XS(b)
    • S(j);OGATE::QAB(C)
    • S(j);SBLOCK::B(H)+R(G),DCHECK
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(h);S_FLIGHT::QAB1(C),XP(d)
      • Refutation
        • K(h);P-FLIGHT,XP(E)
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • B(a);XQ(C)::S(B),XB(a)
        • Q(f);SBLOCK::B(H)+R(G),DCHECK
        • S(j);N_GUARD::QAB1(C)
        • S(j);N_GUARD::QAB1(C),XS(j)
        • P(g);::S(B),XP(g)
      • Refutation
        • Q(f);
  • Actual
    • Q(C);XP(d)
    • Threat
      • S(B)
    • Vars
      • B(a);OGATE,P_SPINB(a),XP(E)::QAR1(C),XB(a)
      • Q(f);N_GUARD::QAB(C),XB(e)
      • B(a);N_GUARD::S(B),XB(a)
      • S(j);N_GUARD::QAR2(C),XP(g)
      • P(g);::S(B),XP(g)
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