MESON Chess Problem Database

Problem Display
PID: 12043 (2b5/7B/1Q2n3/Kp3r2/1N2k3/3Rp1p1/1B3qP1/8 w - - 0 1)

Hermanson, Halvar

Die Schwalbe, 1974

2b5/7B/1Q2n3/Kp3r2/1N2k3/3Rp1p1/1B3qP1/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qxe3#
    • 1...Qxb2
      • 2.Qxe3#
    • 1...Qc2
      • 2.Qxe3#
    • 1...Qxg2
      • 2.Qxe3#
    • 1...Qf4
      • 2.Qc6#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sf4
      • 2.Qd4#
    • 1...Sg5
      • 2.Qd4#
    • 1...Sc7
      • 2.Qd4#
    • 1...Sg7
      • 2.Qd4#
    • 1...Sd8
      • 2.Qd4#
    • 1...Sf8
      • 2.Qd4#
  • Tries
    • 1.Rd4+?
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Ke5!
    • 1.Qc5?
      • threat
        • 2.Qe5#
      • 1...Kf4
        • 2.Qxf5#
      • 1...Qxb2
        • 2.Qxe3#
        • 2.Qxf5#
      • 1...Qxg2
        • 2.Qxe3#
        • 2.Qxf5#
      • 1...Qf4
        • 2.Qd5#
        • 2.Qc6#
      • 1...Sd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Sxc5!
  • Keys
    • 1.Qxb5!
      • threat
        • 2.Qe5#
      • 1...Kf4
        • 2.Qxf5#
      • 1...Qxb2
        • 2.Qxf5#
      • 1...Qxg2
        • 2.Qxf5#
      • 1...Qf4
        • 2.Qd5#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Sc5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::QAR1(F),XP(b)
    • Q(a);N_GUARD,XB(A)::QAR1(F),XP(b)
    • Q(a);N_GUARD,XP(B)::QAR1(F),XP(b)
    • Q(a);SBLOCK::QAB(F)
    • S(g);N_GUARD::QAR1(F),XS(g)
    • S(g);N_GUARD,SBLOCK::QAR1(F)
    • S(g);N_GUARD::QAR1(F)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(g);OGATE,XR(C)::QAR1(F),XS(g)
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(d);N_SPINR(f),P-FLIGHT::QAR1(F),XR(f)
      • Refutation
        • S(g);XQ(F)
  • Actual
    • Q(F);P_SPINQ(F),XP(e)
    • Threat
      • QAR1(F)
    • Vars
      • K(d);N_SPINR(f),P-FLIGHT::QAR1(F),XR(f)
      • Q(a);N_GUARD,XB(A)::QAB1(F),XR(f)
      • Q(a);N_GUARD,XP(B)::QAB1(F),XR(f)
      • Q(a);SBLOCK::QAB1(F)
      • S(g);N_GUARD::R1(C),XS(g)
      • S(g);N_PINQ(F)::QAR2(F)
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