MESON Chess Problem Database

Problem Display
PID: 178549 (K4B2/8/2R1R3/3k1P2/2p1n3/2Pn4/8/3Q2b1 w - - 0 1)

Levrier, Jean

Bulletin Ouvrier des Echecs, 1952

K4B2/8/2R1R3/3k1P2/2p1n3/2Pn4/8/3Q2b1

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Rc5#
    • 1...Sc5
      • 2.Rcd6#
  • Tries
    • 1.Qxd3+?
      • 1...Bd4
        • 2.Qxc4#
        • 2.Qxe4#
        • 2.Qxd4#
      • 1...cxd3!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxe4#
      • 1...Sf2
        • 2.Rc5#
      • 1...Sc5
        • 2.Rcd6#
      • 1...Se5
        • 2.Red6#

There are these versions: 178622

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(d);N_GUARD,S_CUTB(a)::R1(D)
    • S(d);N_GUARD,SBLOCK::R1(D)
  • Tries
    • Try
      • Q(A);CHECK,XS(b)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • Q(A);N_PINS(b),P_PINS(d)
    • Threat
      • QAB1(A),XS(d)
    • Vars
      • S(b);N_GUARD,S_CUTB(a)::R1(D)
      • S(b);SBLOCK::R1(D)
      • S(b);SBLOCK::R1(E)
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