MESON Chess Problem Database

Problem Display
PID: 50330 (3RN2B/5Q2/K3p1P1/2R1N3/2p1k1P1/2b1p1q1/2P1n1P1/8 w - - 0 1)

Casa, Alex

HM., StrateGems, 2003

3RN2B/5Q2/K3p1P1/2R1N3/2p1k1P1/2b1p1q1/2P1n1P1/8

#2

11 + 7

145 StrateGems 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qf3#
    • 1...Qh2
      • 2.Qf3#
    • 1...Qf4
      • 2.Qb7#
    • 1...Qh4
      • 2.Qf3#
    • 1...Qxe5
      • 2.Qf3#
    • 1...Qf3
      • 2.Qxf3#
      • 2.gxf3#
    • 1...Bd4
      • 2.Sd6#
    • 1...Sd4
      • 2.Sd6#
    • 1...Sf4
      • 2.Sf6#
  • Tries
    • 1.Rd4+?
      • 1...Bxd4
        • 2.Sd6#
      • 1...Sxd4
        • 2.Sd6#
      • 1...Kxd4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qb7#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...cxd3
        • 2.cxd3#
      • 1...Qe5
        • 2.Qf3#
      • 1...Qc7
        • 2.Qf3#
      • 1...Qb8
        • 2.Qf3#
      • 1...Sd4
        • 2.Sf6#
      • 1...Sf4
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(d);N_GUARD::QAB1(H)
    • Q(d);SBLOCK::QAB(H)
    • Q(d);N_GUARD,XS(E)::QAB1(H)
    • B(b);SBLOCK::S(J)
    • S(a);SBLOCK::S(J)
  • Tries
    • Try
      • R(I);CHECK
      • Vars
        • B(b);SBLOCK,XR(I)::S(J)
        • S(a);SBLOCK,XR(I)::S(J)
      • Refutation
        • K(f);P-FLIGHT,XR(I)
  • Actual
    • S(E);
    • Threat
      • QAB(H)
    • Vars
      • Q(d);CHECK,N_GUARD::S(J),XQ(d)
      • P(e);OGATE,XS(E)::P(A),XP(e)
      • Q(d);N_GUARD::QAB1(H)
      • S(a);S_CUTB(b)::S(J)
      • S(a);S_CUTQ(d)::S(J)
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Developed and maintained by Brian Stephenson.
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