MESON Chess Problem Database

Problem Display
PID: 226973 (3K4/2p5/2Nkp1b1/pQ1B2rN/8/3R2p1/3n4/8 w - - 0 1)

Foster, Geoffrey R

US Problem Bulletin, 1984

3K4/2p5/2Nkp1b1/pQ1B2rN/8/3R2p1/3n4/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Be4#
    • 1...Bf5
      • 2.Be4#
    • 1...a4
      • 2.Qb4#
  • Keys
    • 1.Se5!
      • threat
        • 2.Be4#
      • 1...Kxe5
        • 2.Bc6#
      • 1...Rxe5
        • 2.Qc6#
      • 1...Bxd3
        • 2.Sf7#
      • 1...exd5
        • 2.Qxd5#
      • 1...Be4
        • 2.Sf7#
        • 2.Bxe4#
      • 1...Sb3
        • 2.Sc4#
      • 1...Sf3
        • 2.Sc4#
      • 1...Se4
        • 2.Sc4#
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bxe4#
        • 2.Bc6#
        • 2.Bb7#
        • 2.Ba8#
      • 1...c5
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • R(d);N_GUARD::R(A)+B(C)
    • B(g);S_CUTR(d)::R(A)+B(C)
    • P(c);N_GUARD::QAB(B)
  • Actual
    • S(E);
    • Threat
      • R(A)+B(C)
    • Vars
      • K(e);S_FLIGHT,XS(E)::QAR(B)+B(C)
      • R(d);SBLOCK,XS(E)::QAR1(B)
      • B(g);N_GUARD,XR(A)::S(E)
      • P(f);OGATE,P_SPINP(f),XB(C)::QAR1(B),XP(f)
      • S(a);N_GUARD::S(E)
      • P(h);OGATEB,SBLOCK::QAB(B)
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