MESON Chess Problem Database

Problem Display
PID: 80695 (b7/p3rr1p/N2Q2pK/1B1P1Pn1/3kP2R/2p1N3/2p1PP2/n7 w - - 0 1)

Shire, David J

StrateGems, 2008

b7/p3rr1p/N2Q2pK/1B1P1Pn1/3kP2R/2p1N3/2p1PP2/n7

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qb4#
      • 2.Qc5#
    • 1...Bxd5
      • 2.Qxd5#
    • 1...Bc6
      • 2.dxc6#
    • 1...Sb3
      • 2.Sxc2#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Qc5#
      • 1...Rc7
        • 2.Qe5#
      • 1...Se6
        • 2.Qe5#
      • 1...Sb3!
    • 1.Qb6+?
      • 1...Ke5
        • 2.Sc4#
      • 1...axb6!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qb4#
      • 1...Kxe4
        • 2.Se3#
      • 1...Rxe4
        • 2.Qc5#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Sxe4
        • 2.e3#
      • 1...Rc7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(k);OGATE,P_SPINB(k),XP(G)::QAR1(J),XB(k)
    • B(k);OGATE::QAR(J)+P(G),XB(k)
    • S(a);N_GUARD::S(C),XP(b)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(J)
      • Vars
        • R(h);N_GUARD::QAB1(J)
        • S(e);S_CUTR(h)::QAB1(J)
      • Refutation
        • S(a);
    • Try
      • Q(J);CHECK
      • Vars
        • K(d);S_FLIGHT::S(C)
      • Refutation
        • P(g);XQ(J)
  • Actual
    • S(C);
    • Threat
      • QAR2(J)
    • Vars
      • K(d);P-FLIGHT,XP(D)::R(E)+S(C)
      • R(h);SBLOCK,XP(D)::QAB1(J)
      • B(k);OGATE,P_SPINB(k),XP(G)::QAR1(J),XB(k)
      • S(e);SBLOCK,XP(D)::P(A)
      • R(h);N_GUARD::QAB1(J)
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