MESON Chess Problem Database

Problem Display
PID: 242684 (2Q1N3/1B6/4P1PR/4Pkn1/4pr2/7P/4N3/b5RK w - - 0 1)

Hartong, Jan

Tijdschrift vd KNSB, 1950

2Q1N3/1B6/4P1PR/4Pkn1/4pr2/7P/4N3/b5RK

#2

11 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5
      • 2.Sg3#
    • 1...Sxe6
      • 2.Rh5#
  • Tries
    • 1.Sd4+?
      • 1...Kxe5
        • 2.Qc5#
      • 1...Bxd4!
    • 1.e7+?
      • 1...Se6
        • 2.Rh5#
      • 1...Kxe5!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Sg7#
      • 1...Kxe6
        • 2.Bc8#
      • 1...Bxe5
        • 2.Sd4#
      • 1...Sxe6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK,XP(E)::S(C)
    • S(e);OGATEB,P_SPINS(e),XP(F)::R(H)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(E)::QAR2(J)
      • Refutation
        • B(a);XS(C)
    • Try
      • P(F);CHECK
      • Vars
        • S(e);P_SPINS(e)::R(H)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
  • Actual
    • Q(J);
    • Threat
      • S(K)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XP(F)::B(I)
      • B(a);N_GUARD,P_SPINB(a),XP(E)::S(C)
      • S(e);SBLOCK,XP(F)::S(K)
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