MESON Chess Problem Database

Problem Display
PID: 164773 (4R1B1/7n/rB1p2p1/5k2/4N2R/7n/6PK/8 w - - 0 1)

Shire, David J

Comm., The Problemist, 2016

4R1B1/7n/rB1p2p1/5k2/4N2R/7n/6PK/8

#2

7 + 6

56 The Problemist 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.g4#
    • 1...g5
      • 2.Bxh7#
  • Tries
    • 1.Be3?
      • threat
        • 2.g4#
      • 1...g5
        • 2.Bxh7#
      • 1...Sf2
        • 2.Rf4#
      • 1...Sf6
        • 2.Sg3#
      • 1...Ra2!
    • 1.Bd8?
      • threat
        • 2.Sg3#
      • 1...g5
        • 2.Bxh7#
      • 1...Ra3
        • 2.Sxd6#
      • 1...Sf6!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Be6#
      • 1...g5
        • 2.Bxh7#
      • 1...Sf4
        • 2.g4#
      • 1...S3g5
        • 2.Sg3#
      • 1...S7g5
        • 2.Sg3#
      • 1...Sf8
        • 2.Rxf8#
      • 1...d5
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::P(A)
    • P(e);OGATEB::B(G),XS(f)
  • Tries
    • Try
      • B(E);
      • Threat
        • P(A)
      • Vars
        • P(e);OGATEB::B(G),XS(f)
        • S(a);N_GUARD::R1(D)
        • S(f);SBLOCK::S(C)
      • Refutation
        • R(c);P_PINP(A)
    • Try
      • B(E);
      • Threat
        • S(C)
      • Vars
        • P(e);OGATEB::B(G),XS(f)
        • R(c);N_GUARD::S(C),XP(d)
      • Refutation
        • S(f);
  • Actual
    • B(E);
    • Threat
      • B(G)
    • Vars
      • P(e);OGATEB::B(G),XS(f)
      • S(a);SBLOCK::P(A)
      • S(a);SBLOCK::S(C)
      • S(f);SBLOCK::S(C)
      • S(f);N_GUARD::R(F),XS(f)
      • P(d);N_GUARD::R1(F)
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