MESON Chess Problem Database

Problem Display
PID: 142745 (4K3/1Q6/B1p5/kN2n2R/bb6/4N3/3n4/R3B3 w - - 0 1)

Lepage, Roger

diagrammes, 1973

4K3/1Q6/B1p5/kN2n2R/bb6/4N3/3n4/R3B3

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...cxb5
      • 2.Qxb5#
  • Tries
    • 1.Sa7?
      • threat
        • 2.Sxc6#
      • 1...c5+
        • 2.Qb5#
      • 1...Ba3
        • 2.Sc4#
      • 1...Bc5!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sxc6#
      • 1...c5+
        • 2.Qb5#
      • 1...Ba3
        • 2.Sc4#
      • 1...Bc5
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(f);OGATE,XS(D)::QAR1(G),XP(f)
  • Tries
    • Try
      • S(D);P_PINS(e)
      • Threat
        • S(D),XP(f)
      • Vars
        • P(f);CHECK,N_GUARD,N_SPINS(e)::QAR1(G)
        • B(c);N_SPINB(b),N_SPINS(e),P_SPINS(a)::S(C)
      • Refutation
        • B(c);N_SPINS(e),P_SPINS(a)
  • Actual
    • S(D);P_PINS(e)
    • Threat
      • S(D),XP(f)
    • Vars
      • P(f);CHECK,N_GUARD,N_SPINS(e)::QAR1(G)
      • B(c);N_SPINB(b),N_SPINS(e),P_SPINS(a)::S(C)
      • B(c);N_SPINS(e),P_SPINS(a)::S(D)
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