MESON Chess Problem Database

Problem Display
PID: 221835 (2n1bB2/2K5/2p2p1N/2p1k3/2B1p3/1NPpQ3/8/n2r1r2 w - - 0 1)

Shire, David J

StrateGems, 2020

2n1bB2/2K5/2p2p1N/2p1k3/2B1p3/1NPpQ3/8/n2r1r2

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qg3#
    • 1...Rh1
      • 2.Qg3#
    • 1...Rf4
      • 2.Qxc5#
    • 1...Rf5
      • 2.Sg4#
    • 1...Sb6
      • 2.Bd6#
    • 1...Sd6
      • 2.Bxd6#
    • 1...Sa7
      • 2.Bd6#
    • 1...f5
      • 2.Bg7#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Sg4#
      • 1...cxd4
        • 2.cxd4#
      • 1...f5
        • 2.Bg7#
      • 1...Rg1
        • 2.Sf3#
      • 1...Bh5
        • 2.Sxc6#
      • 1...Bd7
        • 2.Sf7#
      • 1...Rf4!
    • 1.Qg5+?
      • 1...Rf5
        • 2.Sg4#
        • 2.Qxf5#
      • 1...f5
        • 2.Sg4#
        • 2.Bg7#
      • 1...fxg5!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Qxe4#
      • 1...f5
        • 2.Bg7#
      • 1...Rde1
        • 2.Sxd3#
      • 1...Rfe1
        • 2.Qg3#
      • 1...Rf4
        • 2.Qd4#
      • 1...Bg6
        • 2.Sd7#
      • 1...Sd6
        • 2.Bxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::QAB(C)
    • R(c);SBLOCK::QAR2(C),XP(f)
    • R(c);SBLOCK::S(E)
    • S(j);N_GUARD::B(G)
    • S(j);N_GUARD::B(G),XS(j)
    • P(i);OGATEB::B(G)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(E)
      • Vars
        • P(f);OGATE,XS(A)::P(B),XP(f)
        • P(i);OGATEB::B(G)
        • R(c);N_GUARD::S(A)
        • B(k);N_GUARD::S(A),XP(h)
        • B(k);N_GUARD::S(E)
      • Refutation
        • R(c);
    • Try
      • Q(C);CHECK,N_PINP(e)
      • Refutation
        • P(i);XQ(C)
  • Actual
    • S(A);XP(f)
    • Threat
      • QAR1(C),XP(e)
    • Vars
      • P(i);OGATEB::B(G)
      • R(b);N_GUARD::S(A),XP(d)
      • R(c);N_GUARD::QAB(C)
      • R(c);SBLOCK::QAB1(C)
      • B(k);N_GUARD::S(A)
      • S(j);N_GUARD::B(G),XS(j)
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Developed and maintained by Brian Stephenson.
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