MESON Chess Problem Database

Problem Display
PID: 78843 (1B2RKb1/1p1kp3/1Rpbp2n/p3pp2/2nN4/1B6/8/3Q4 w - - 0 1)

Shire, David J

Problem Observer, 2008

1B2RKb1/1p1kp3/1Rpbp2n/p3pp2/2nN4/1B6/8/3Q4

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Rxb7#
    • 1...Bb4
      • 2.Rxb7#
    • 1...Bc5
      • 2.Rxb7#
    • 1...c5
      • 2.Ba4#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Rxb7#
      • 1...Sxb6
        • 2.Sxe5#
      • 1...c5
        • 2.Ba4#
      • 1...Sd2!
    • 1.Sxc6?
      • threat
        • 2.Rd8#
      • 1...Sxb6
        • 2.Sxe5#
      • 1...bxc6
        • 2.Rb7#
      • 1...Sf7!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Sc5#
      • 1...Kxe6
        • 2.Qxd6#
      • 1...Bxe6
        • 2.Rxb7#
      • 1...Sd2
        • 2.Rd8#
      • 1...c5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(f);N_GUARD::R(D),XP(i)
    • P(e);OGATEB::B(B)
  • Tries
    • Try
      • S(C);P_PINB(f)
      • Threat
        • R(D),XP(i)
      • Vars
        • S(a);N_GUARD,XR(D)::S(C),XP(c)
        • P(e);OGATEB::B(B)
      • Refutation
        • S(a);N_SPINB(f)
    • Try
      • S(C);P_PINB(f),XP(e)
      • Threat
        • R1(F)
      • Vars
        • S(a);N_GUARD,XR(D)::S(C),XP(c)
        • P(i);SBLOCK,XS(C)::R(D)
      • Refutation
        • S(h);
  • Actual
    • S(C);P_PINB(f),XP(g)
    • Threat
      • S(C)
    • Vars
      • K(j);N_SPINB(f),P_SPINP(k),P_SPINS(a),S_FLIGHT,XS(C)::QAR1(A),XB(f)
      • B(l);SBLOCK,XS(C)::R(D),XP(i)
      • S(a);N_SPINB(f)::R1(F)
      • P(e);::S(C),XP(e)
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