MESON Chess Problem Database

Problem Display
PID: 60209 (N1R5/8/R7/3k3r/4n2r/5N1n/1K5Q/1b6 w - - 0 1)

Lazard, Frederic

L'Echiquier, 1925

N1R5/8/R7/3k3r/4n2r/5N1n/1K5Q/1b6

#2

6 + 6

797 Bulletin de la FFE 1927

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxe5#
    • 1...Rh6
      • 2.Qe5#
    • 1...Rh7
      • 2.Qe5#
    • 1...Rh8
      • 2.Qe5#
    • 1...Shg5
      • 2.Qe5#
    • 1...Seg5
      • 2.Qe5#
  • Tries
    • 1.Qd2+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sxd2!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qc4#
      • 1...Ba2
        • 2.Qd3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sd2
        • 2.Qe6#
      • 1...Sef2
        • 2.Qe6#
      • 1...Sc3
        • 2.Qe6#
      • 1...Sg3
        • 2.Qe6#
      • 1...Sc5
        • 2.Sc7#
      • 1...Seg5
        • 2.Qe5#
      • 1...Sd6
        • 2.Sb6#
      • 1...Sf6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 5
  • Sets
    • R(f);N_GUARD::QAR1(B),XR(f)
    • R(f);N_GUARD::QAR1(B)
    • S(b);S_CUTR(f)::QAR1(B)
    • S(c);S_CUTR(f)::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(B),XB(a)
      • Refutation
        • S(c);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • B(a);N_GUARD::QAR2(B)
      • B(a);N_GUARD::QAR2(B),XB(a)
      • S(c);OGATE::QAB1(B)
      • S(c);SBLOCK::S(E)
      • S(c);OGATE::QAR1(B)
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