MESON Chess Problem Database

Problem Display
PID: 116362 (7q/4b3/4Q1P1/7r/1R1PNkpP/3P2r1/5P2/1K2N3 w - - 0 1)

Hermanson, Halvar

SEPA, 1971

7q/4b3/4Q1P1/7r/1R1PNkpP/3P2r1/5P2/1K2N3

#2

10 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Sg2#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Qe4#
      • 1...Qxd4
        • 2.Rxd4#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qa8
        • 2.Qe5#
      • 1...Re3
        • 2.Sg2#
      • 1...Rxh4!
    • 1.Sd6?
      • threat
        • 2.Qe4#
      • 1...Qxd4
        • 2.Rxd4#
      • 1...Rxh4
        • 2.Qf5#
      • 1...Qe5
        • 2.dxe5#
      • 1...Qa8
        • 2.d5#
      • 1...Re3
        • 2.Qxe3#
      • 1...Re5
        • 2.dxe5#
      • 1...Bxh4!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qe4#
      • 1...Rxh4
        • 2.Qe5#
      • 1...Qa8
        • 2.Sxh5#
      • 1...Re3
        • 2.Qxg4#
      • 1...Re5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD,SBLOCK::S(B)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAR1(I)
      • Vars
        • Q(f);OGATE,P_SPINQ(f),XP(F)::R(E),XQ(f)
        • Q(f);N_GUARD::QAB1(I),XQ(f)
        • Q(f);N_GUARD::QAB1(I)
        • R(a);N_GUARD::S(B)
      • Refutation
        • R(d);XP(H)
    • Try
      • S(G);
      • Threat
        • QAR1(I)
      • Vars
        • Q(f);OGATE,P_SPINQ(f),XP(F)::R(E),XQ(f)
        • R(d);N_GUARD,XP(H)::QAR1(I)
        • Q(f);OGATE::R(E)+P(F),XQ(f)
        • Q(f);N_GUARD::R(E)+P(F)
        • R(a);N_GUARD::QAB1(I),XR(a)
        • R(d);OGATE::R(E)+P(F),XR(d)
      • Refutation
        • B(e);XP(H)
  • Actual
    • S(G);
    • Threat
      • QAR1(I)
    • Vars
      • R(d);N_GUARD,XP(H)::QAB1(I)
      • Q(f);N_GUARD::S(G),XR(d)
      • R(a);N_GUARD::QAR1(I),XP(c)
      • R(d);N_GUARD::QAB1(I),XR(d)
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