MESON Chess Problem Database

Problem Display
PID: 227020 (5q2/2QPp3/p3P3/3NR3/n2kP2N/1r3r2/1P2RP2/1B2K3 w - - 0 1)

Backe, Espen

US Problem Bulletin, 1985

5q2/2QPp3/p3P3/3NR3/n2kP2N/1r3r2/1P2RP2/1B2K3

#2

12 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Sc3?
      • threat
        • 2.Rd5#
      • 1...Sxc3
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Qf5
        • 2.d8Q#
        • 2.d8R#
      • 1...Qa8
        • 2.Sxf3#
      • 1...Rf5
        • 2.Rd2#
      • 1...Sb6
        • 2.Qc5#
      • 1...Rb5!
    • 1.Se3?
      • threat
        • 2.Rd5#
      • 1...Qf5
        • 2.d8Q#
        • 2.d8R#
      • 1...Qa8
        • 2.Sxf3#
      • 1...Rd3
        • 2.Sc2#
      • 1...Rb5
        • 2.Rd2#
      • 1...Sc3
        • 2.Rd2#
        • 2.Qc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...Rf5!
    • 1.Sf6?
      • threat
        • 2.Rd5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Rf5
        • 2.Sxf5#
      • 1...Rb5
        • 2.Sxf3#
      • 1...Sc3
        • 2.Sxf3#
        • 2.Qc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...Qa8!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Rd5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Qf5
        • 2.Sxf5#
        • 2.d8Q#
        • 2.d8R#
      • 1...Qa8
        • 2.Sf5#
      • 1...Rb5
        • 2.Sxf3#
      • 1...Sc3
        • 2.Sxf3#
        • 2.Qc5#
      • 1...Sb6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(H);
      • Threat
        • R1(I)
      • Vars
        • S(c);N_GUARD,XS(H)::QAB1(K)
        • S(c);N_GUARD::QAB1(K),XS(c)
        • Q(g);N_GUARD::P=Q
        • Q(g);N_GUARD::S(G),XR(b)
        • R(b);N_GUARD::R(D)
        • S(c);N_GUARD::QAB1(K)
      • Refutation
        • R(a);
    • Try
      • S(H);
      • Threat
        • R1(I)
      • Vars
        • Q(g);N_GUARD::P=Q
        • Q(g);N_GUARD::S(G),XR(b)
        • R(a);SBLOCK::S(H)
        • R(a);N_GUARD::R(D)
        • S(c);N_GUARD::QAB1(K)
      • Refutation
        • R(b);
    • Try
      • S(H);
      • Threat
        • R1(I)
      • Vars
        • S(c);N_GUARD::QAB1(K),XS(c)
        • R(b);N_GUARD::S(G),XR(b)
        • R(a);N_GUARD::S(G),XR(b)
        • S(c);N_GUARD::QAB1(K)
      • Refutation
        • Q(g);
  • Actual
    • S(H);
    • Threat
      • R1(I)
    • Vars
      • S(c);N_GUARD::QAB1(K),XS(c)
      • Q(g);N_GUARD::S(G)
      • R(a);N_GUARD::S(G),XR(b)
      • S(c);N_GUARD::QAB1(K)
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