MESON Chess Problem Database

Problem Display
PID: 160516 (4K2n/2NQ1p2/b3p2B/1p1pk3/5R2/6N1/5pr1/7B w - - 0 1)

Shire, David J

British Chess Magazine, 2010

4K2n/2NQ1p2/b3p2B/1p1pk3/5R2/6N1/5pr1/7B

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qxd4#
    • 1...f5
      • 2.Qxe6#
    • 1...f6
      • 2.Qxe6#
  • Tries
    • 1.Sxb5?
      • threat
        • 2.Qd6#
        • 2.Qc7#
      • 1...f5
        • 2.Qg7#
      • 1...d4
        • 2.Qxd4#
        • 2.Qd6#
      • 1...Bxb5!
    • 1.Sxa6?
      • threat
        • 2.Qc7#
      • 1...d4
        • 2.Qxd4#
      • 1...f5!
    • 1.Sa8?
      • threat
        • 2.Qc7#
      • 1...d4
        • 2.Qxd4#
      • 1...f5!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Re4#
      • 1...Rxg3
        • 2.Qc7#
      • 1...exd5
        • 2.Qe7#
      • 1...f5
        • 2.Bg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(d);OGATE::QAB1(F),XP(d)
    • P(h);N_GUARD::QAR1(F),XP(g)
  • Tries
    • Try
      • S(E);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);OGATE::QAB(F)
      • Refutation
        • B(f);P_PINQ(F),XS(E)
    • Try
      • S(E);XB(f)
      • Threat
        • QAB(F)
      • Vars
        • P(d);OGATE::QAB1(F),XP(d)
      • Refutation
        • P(h);
    • Try
      • S(E);
      • Threat
        • QAB(F)
      • Vars
        • P(d);OGATE::QAB1(F),XP(d)
      • Refutation
        • P(h);
  • Actual
    • S(E);XP(d)
    • Threat
      • R1(C)
    • Vars
      • R(b);XS(B)::QAB(F)
      • P(g);OGATEB,SBLOCK,XS(E)::QAR2(F)
      • P(h);N_GUARD::B(D)
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