MESON Chess Problem Database

Problem Display
PID: 102981 (8/8/1q1p4/1BB2p2/Q6p/4n2K/5b1R/1n4k1 w - - 0 1)

Hermanson, Halvar

Dunaujvarosi Hirlap, 1962-1964

8/8/1q1p4/1BB2p2/Q6p/4n2K/5b1R/1n4k1

#2

5 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qxd1#
    • 1...Sc4
      • 2.Qd1#
    • 1...Sg4
      • 2.Qd1#
    • 1...Sd5
      • 2.Qd1#
  • Tries
    • 1.Qd1+?
      • 1...Be1
        • 2.Qxe1#
      • 1...Sf1
        • 2.Qxf1#
      • 1...Sxd1!
    • 1.Qa2?
      • threat
        • 2.Qxf2#
      • 1...Be1
        • 2.Qg2#
      • 1...Bg3
        • 2.Qg2#
      • 1...Sd1
        • 2.Qg8#
      • 1...Sc2
        • 2.Qg8#
      • 1...Sg4
        • 2.Qxb1#
      • 1...Sd2!
    • 1.Qe4?
      • threat
        • 2.Rh1#
        • 2.Qh1#
      • 1...Qc6
        • 2.Rh1#
      • 1...Qb7
        • 2.Rh1#
      • 1...Be1
        • 2.Qh1#
        • 2.Qg2#
      • 1...Bg3
        • 2.Qh1#
        • 2.Qg2#
      • 1...Sg2
        • 2.Qxg2#
      • 1...fxe4!
    • 1.Qxh4?
      • threat
        • 2.Qxf2#
      • 1...Bg3
        • 2.Qxg3#
      • 1...Be1
        • 2.Qxe1#
      • 1...Sd1
        • 2.Qg3#
        • 2.Qg5#
      • 1...Sg4
        • 2.Qg3#
      • 1...Bxh4!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qxf2#
      • 1...Be1
        • 2.Qf1#
      • 1...Bg3
        • 2.Qf1#
      • 1...Sd1
        • 2.Qg5#
      • 1...Sg4
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(d);N_GUARD,P_SPINB(c)::QAR(C),XS(d)
    • S(d);N_GUARD,P_SPINB(c)::QAR(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c),P_SPINS(d)::QAR2(C),XB(c)
        • S(d);N_GUARD,P_SPINB(c),P_SPINS(d)::QAR1(C),XS(d)
      • Refutation
        • S(d);P_SPINB(c),XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB1(C),XB(c)
      • Vars
        • B(c);OGATE,P_SPINS(d)::QAR1(C)
        • S(d);N_GUARD,P_SPINB(c)::QAB(C)
        • S(d);N_GUARD,P_SPINB(c)::QAR(C),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);::R1(A)
        • S(d);N_GUARD,P_SPINB(c)::QAR1(C),XS(d)
      • Refutation
        • P(f);XQ(C)
    • Try
      • Q(C);XP(e)
      • Threat
        • QAB1(C),XB(c)
      • Vars
        • B(c);N_GUARD,P_SPINS(d)::QAR2(C),XB(c)
        • B(c);OGATE,P_SPINS(d)::QAR2(C),XB(c)
        • S(d);N_GUARD,P_SPINB(c)::QAR2(C)
      • Refutation
        • B(c);P_SPINS(d),XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XB(c)
    • Vars
      • B(c);OGATE,P_SPINS(d)::QAR1(C)
      • S(d);N_GUARD,P_SPINB(c)::QAR(C)
      • S(d);OGATE,P_SPINB(c)::QAR(C)
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