MESON Chess Problem Database

Problem Display
PID: 239504 (2brQ3/3n4/n6b/6p1/1PR5/kB5R/2pN4/2K1B3 w - - 0 1)

Haring, Jacobus

Magyar Sakkelet, 1971

2brQ3/3n4/n6b/6p1/1PR5/kB5R/2pN4/2K1B3

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Qa4#
    • 1...Sf6
      • 2.Qa4#
    • 1...Sb8
      • 2.Qa4#
    • 1...Sf8
      • 2.Qa4#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Sc4#
      • 1...Se5
        • 2.Qa4#
      • 1...Sb6
        • 2.Be6#
      • 1...g4!
    • 1.Rf4?
      • threat
        • 2.Sc4#
      • 1...Se5
        • 2.Qa4#
      • 1...Sb6!
    • 1.Qe5?
      • threat
        • 2.Qa1#
        • 2.Qb2#
        • 2.Qa5#
      • 1...Sxb4
        • 2.Qb2#
        • 2.Qa5#
      • 1...Bg7
        • 2.Qa5#
      • 1...Sac5
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sdc5
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sb6
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sxe5!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Sc4#
      • 1...Se5
        • 2.Qa4#
      • 1...Sb6
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(f);OGATE::QAR1(H)
  • Tries
    • Try
      • R(G);
      • Threat
        • S(C)
      • Vars
        • S(f);OGATE::QAR1(H)
        • S(f);::R(E)+B(D)
      • Refutation
        • P(c);P_PINS(C)
    • Try
      • R(G);
      • Threat
        • S(C)
      • Vars
        • S(f);OGATE::QAR1(H)
      • Refutation
        • S(f);
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • B(e);::QAR2(H)
      • Refutation
        • S(f);XQ(H)
  • Actual
    • R(G);
    • Threat
      • S(C)
    • Vars
      • S(f);OGATE::QAR1(H)
      • S(f);::R(E)+B(D)
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