MESON Chess Problem Database

Problem Display
PID: 238745 (2b1n3/4Q3/p2p3K/4NkB1/3p2p1/3P4/4n3/q3b3 w - - 0 1)

Groeneveld, Cornelis

L'Italia Scacchistica, 2004

2b1n3/4Q3/p2p3K/4NkB1/3p2p1/3P4/4n3/q3b3

#2

5 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sc7
      • 2.Qf6#
    • 1...Sg7
      • 2.Qf6#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Qe4#
      • 1...Be6
        • 2.Qh7#
      • 1...Sc3
        • 2.Sxd4#
      • 1...Sf6
        • 2.Qxf6#
      • 1...d5
        • 2.Qe5#
      • 1...Sg3!
    • 1.Qf7+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Kxe5!
    • 1.Qh7+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Ke6!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qe4#
      • 1...Be6
        • 2.Qh7#
      • 1...Bb7
        • 2.Qd7#
      • 1...Sc3
        • 2.Sxd4#
      • 1...Sg3
        • 2.Sh4#
      • 1...Sf6
        • 2.Qxf6#
      • 1...d5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(j);N_GUARD::QAR1(E),XS(j)
    • S(j);N_GUARD::QAR1(E)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(E)
      • Vars
        • B(i);SBLOCK::QAB(E)
        • S(c);N_GUARD,S_CUTQ(a)::S(B),XP(d)
        • S(j);N_GUARD::QAR1(E),XS(j)
        • P(h);N_GUARD::QAR1(E)
      • Refutation
        • S(c);
    • Try
      • Q(E);CHECK
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::QAR1(E),XS(j)
      • Refutation
        • K(f);P-FLIGHT,XS(B)
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);OGATE,P-FLIGHT,XS(B)::QAR1(E)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAB1(E)
    • Vars
      • B(i);SBLOCK::QAB(E)
      • B(i);N_GUARD::QAB(E)
      • S(c);N_GUARD,S_CUTQ(a)::S(B),XP(d)
      • S(c);S_CUTB(b)::S(B)
      • S(j);N_GUARD::QAR1(E),XS(j)
      • P(h);N_GUARD::QAR1(E)
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