MESON Chess Problem Database

Problem Display
PID: 142749 (1R6/8/1qB1bp2/b7/NkrN1R1B/p3Q1r1/2P3p1/6K1 w - - 0 1)

Lepage, Roger

diagrammes, 1973

1R6/8/1qB1bp2/b7/NkrN1R1B/p3Q1r1/2P3p1/6K1

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Qb3#
    • 1...Rg5
      • 2.Qb3#
    • 1...Rg6
      • 2.Qb3#
    • 1...Rg7
      • 2.Qb3#
    • 1...Rg8
      • 2.Qb3#
    • 1...Rxc2
      • 2.Sxc2#
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qc5#
      • 1...Qb5
        • 2.Qb3#
      • 1...Rd4
        • 2.Qc3#
      • 1...Rg5
        • 2.Be1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD::QAR1(C)
    • R(e);XP(B)::R(F)+S(E),DCHECK,XR(e)
  • Actual
    • S(E);P_PINR(e),P_SPINQ(C)
    • Threat
      • QAB1(C)
    • Vars
      • Q(g);N_PINQ(C)::QAR1(C)
      • R(e);N_PINQ(C)::QAB1(C)
      • R(c);OGATE::B(G)
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