MESON Chess Problem Database

Problem Display
PID: 138509 (5K2/3p4/6pB/2Q5/Rb2k3/5p1B/n1P5/8 w - - 0 1)

Ellerman, Arnoldo

Casopis ceskoslovenskych sachistu, 1921

5K2/3p4/6pB/2Q5/Rb2k3/5p1B/n1P5/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Rxb4#
    • 1...Sc3
      • 2.Rxb4#
    • 1...f2
      • 2.Bg2#
  • Tries
    • 1.Bxd7?
      • threat
        • 2.Bc6#
      • 1...Sc3
        • 2.Rxb4#
      • 1...g5!
  • Keys
    • 1.Be3!
      • 1...f2
        • 2.Bg2#
      • 1...d5
        • 2.Qe7#
      • 1...d6
        • 2.Qd4#
      • 1...Sc1
        • 2.Rxb4#
      • 1...Sc3
        • 2.Rxb4#
      • 1...g5
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::R(C),XB(c)
    • P(b);OGATEB::B(B)
  • Tries
    • Try
      • B(B);XP(f)
      • Threat
        • B(B)
      • Vars
        • S(a);N_GUARD::R(C),XB(c)
      • Refutation
        • P(e);
  • Actual
    • B(E);
    • Vars
      • P(b);OGATEB::B(B)
      • P(f);SBLOCK::QAR(D)
      • P(f);N_PINQ(D)::QAR1(D)
      • S(a);N_GUARD::R(C),XB(c)
      • P(e);N_GUARD::B(B)
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