MESON Chess Problem Database

Problem Display
PID: 239511 (N2k4/r2P1R2/p2p4/5n2/8/7K/8/2b4Q w - - 0 1)

Hermanson, Halvar

Magyar Sakkelet, 1959

N2k4/r2P1R2/p2p4/5n2/8/7K/8/2b4Q

#2

5 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qe4?
      • threat
        • 2.Qe8#
      • 1...Rxd7
        • 2.Rf8#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sg7
        • 2.Qe7#
      • 1...Rxa8!
    • 1.Qb7?
      • threat
        • 2.Qc8#
        • 2.Qb8#
      • 1...Rxa8
        • 2.Qb6#
      • 1...Se7
        • 2.Rf8#
      • 1...Rxb7!
    • 1.Qe1?
      • threat
        • 2.Qe8#
      • 1...Rxd7
        • 2.Rf8#
      • 1...Rxa8
        • 2.Qa5#
      • 1...Se7
        • 2.Qxe7#
      • 1...Se3
        • 2.Qh4#
      • 1...Sg7
        • 2.Qe7#
      • 1...Be3!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qc8#
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Rxa8
        • 2.Qb6#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Se7
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(e);SBLOCK,XP(C)::R(D)
        • S(b);N_GUARD::QAB1(A),XS(b)
        • S(b);N_GUARD::QAB1(A)
      • Refutation
        • R(e);XS(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);N_GUARD,XS(E)::QAB(A)
        • S(b);SBLOCK::R(D)
      • Refutation
        • R(e);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(e);SBLOCK,XP(C)::R(D)
        • R(e);N_GUARD,XS(E)::QAB(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
        • S(b);N_GUARD,S_CUTB(a)::QAB(A)
        • S(b);N_GUARD::QAB1(A)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(e);OGATE,XP(C)::QAR1(A),XR(e)
      • R(e);N_GUARD,XS(E)::QAB(A)
      • R(e);N_GUARD::QAB1(A),XR(e)
      • S(b);SBLOCK::R(D)
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