MESON Chess Problem Database

Problem Display
PID: 18084 (5N1B/3n4/7K/5k1N/4p1p1/7n/2Q5/6r1 w - - 0 1)

Hartong, Jan

1st Prize, Il Due Mosse TT, 1953

5N1B/3n4/7K/5k1N/4p1p1/7n/2Q5/6r1

#2

5 + 6

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1955
3147 Chess Problems: Introduction to an Art 1963
4640 Chess Wizardry: The New ABC of Chess Problems 1996
145 StrateGems 2010
136 Problem Observer 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qxf2#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb8
      • 2.Qc5#
  • Tries
    • 1.Qf2+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sxf2!
    • 1.Qc5+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Sxc5!
    • 1.Qc6?
      • threat
        • 2.Qxd7#
        • 2.Qe6#
        • 2.Qg6#
      • 1...Sxf8
        • 2.Qd5#
        • 2.Qf6#
      • 1...Sf6
        • 2.Qe6#
        • 2.Qxf6#
      • 1...Rd1
        • 2.Qe6#
        • 2.Qg6#
      • 1...Sg5
        • 2.Qg6#
      • 1...Sc5
        • 2.Qd5#
        • 2.Qxc5#
        • 2.Qf6#
        • 2.Qg6#
      • 1...Se5
        • 2.Qe6#
        • 2.Qf6#
      • 1...Sb6
        • 2.Qe6#
        • 2.Qf6#
        • 2.Qg6#
      • 1...Sb8
        • 2.Qb5#
        • 2.Qd5#
        • 2.Qc5#
        • 2.Qe6#
        • 2.Qf6#
        • 2.Qg6#
      • 1...e3
        • 2.Qc2#
        • 2.Qe6#
        • 2.Qg6#
      • 1...Sf4!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qxd7#
      • 1...Sxf8
        • 2.Qe5#
        • 2.Qf7#
      • 1...e3
        • 2.Qc2#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Rd1
        • 2.Sg3#
      • 1...Sg5
        • 2.Qf4#
      • 1...Sc5
        • 2.Qe5#
        • 2.Qxc5#
        • 2.Qf7#
        • 2.Qh7#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sb6
        • 2.Qe5#
        • 2.Qf7#
        • 2.Qh7#
      • 1...Sf6
        • 2.Sg7#
      • 1...Sb8
        • 2.Qa5#
        • 2.Qe5#
        • 2.Qc5#
        • 2.Qf7#
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::QAR(A),XS(b)
    • S(f);N_GUARD::QAR(A),XS(f)
    • S(f);N_GUARD::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK,N_PINP(c)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(A),XS(b)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK,N_PINP(c)
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR1(A),XS(f)
      • Refutation
        • S(f);XQ(A)
    • Try
      • Q(A);N_PINP(c)
      • Threat
        • DUALS(3)
      • Vars
        • S(b);::QAB1(A)
      • Refutation
        • S(b);
  • Actual
    • Q(A);N_PINP(c)
    • Threat
      • QAB(A),XS(f)
    • Vars
      • P(c);OGATEB::QAB(A)
      • S(b);N_GUARD::QAR1(A),XS(b)
      • R(a);N_GUARD::S(B)
      • S(b);N_GUARD::QAR1(A)
      • S(f);N_GUARD::QAR1(A),XS(f)
      • S(f);SBLOCK::S(B)
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