MESON Chess Problem Database

Problem Display
PID: 146207 (B7/p7/3Rpp2/4k1n1/KN3r2/2p1N3/4n2Q/3R4 w - - 0 1)

May, G

May, Luigi

Il Problema, 1931

B7/p7/3Rpp2/4k1n1/KN3r2/2p1N3/4n2Q/3R4

#2

7 + 8

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Sc6#
    • 1...f5
      • 2.Qh8#
  • Tries
    • 1.R1d4?
      • threat
        • 2.Sd3#
        • 2.Sc6#
      • 1...f5
        • 2.Qh8#
      • 1...Sc1
        • 2.Sc6#
        • 2.Qxf4#
      • 1...Sxd4!
    • 1.R6d4?
      • threat
        • 2.Sc6#
      • 1...f5
        • 2.Qh8#
      • 1...Sxd4!
  • Keys
    • 1.Ra6!
      • threat
        • 2.Ra5#
      • 1...f5
        • 2.Qh8#
      • 1...Sd4
        • 2.Sd3#
      • 1...Se4
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(e);N_PINS(E),SBLOCK::S(E)
    • P(g);OGATEB::QAB(B)
  • Tries
    • Try
      • R(A);N_SPINS(E)
      • Threat
        • DUALS(2)
      • Vars
        • P(g);OGATEB::QAB(B)
      • Refutation
        • S(a);XR(A)
    • Try
      • R(F);N_SPINS(E)
      • Threat
        • S(E)
      • Vars
        • P(g);OGATEB::QAB(B)
      • Refutation
        • S(a);XR(F)
  • Actual
    • R(F);
    • Threat
      • R(F)
    • Vars
      • P(g);OGATEB::QAB(B)
      • S(a);N_PINS(E),SBLOCK::S(E)
      • S(e);N_PINS(E),SBLOCK::S(E)
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