MESON Chess Problem Database

Problem Display
PID: 77314 (k3r3/8/1KP5/N7/R7/8/3p4/8 w - - 0 1)

Lucena, Luis Ramirez

Arte de Axedrez, 1497

k3r3/8/1KP5/N7/R7/8/3p4/8

#2

4 + 3

302 Schachzeitung 1856

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8+
      • 2.Sb7#
  • Keys
    • 1.c7!
      • threat
        • 2.Sb3#
        • 2.Sc4#
        • 2.Sc6#
        • 2.Sb7#
      • 1...Re6+
        • 2.Sc6#
      • 1...Rb8+
        • 2.Sb7#
      • 1...d1Q
        • 2.Sb3#
      • 1...d1B
        • 2.Sb3#
      • 1...Re4
        • 2.Sc4#
        • 2.c8Q#
        • 2.c8R#
      • 1...Re5
        • 2.c8Q#
        • 2.c8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,SBLOCK::R(A)+S(B)
  • Actual
    • P(D);
    • Threat
      • DUALS(4)
    • Vars
      • R(c);CHECK::R(A)+S(B)
      • P(a);::R(A)+S(B)
      • R(c);N_GUARD::P=Q
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