MESON Chess Problem Database

Problem Display
PID: 185964 (1n6/3r1b2/6p1/2P1kpK1/1p3N2/3pP3/3N2Q1/7B w - - 0 1)

Moser, Hans

Chess, 1958

1n6/3r1b2/6p1/2P1kpK1/1p3N2/3pP3/3N2Q1/7B

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Sc4#
    • 1...Bc4
      • 2.Sxc4#
    • 1...Be6
      • 2.Sxg6#
    • 1...Be8
      • 2.Sc4#
  • Tries
    • 1.Qd5+?
      • 1...Rxd5
        • 2.Sc4#
      • 1...Bxd5!
    • 1.Qc6?
      • threat
        • 2.Sf3#
        • 2.Qf6#
      • 1...Rd5
        • 2.Sc4#
        • 2.Qf6#
      • 1...Rd6
        • 2.Sf3#
        • 2.Qxd6#
      • 1...Bd5
        • 2.Sxd3#
        • 2.Sxg6#
        • 2.Qf6#
      • 1...Be6
        • 2.Sf3#
        • 2.Sxg6#
        • 2.Qxe6#
      • 1...Sxc6!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Sf3#
      • 1...Rd5
        • 2.Sc4#
      • 1...Rb7
        • 2.Qa1#
      • 1...Bd5
        • 2.Qa1#
      • 1...Sc6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(f);S_CUTB(g)::S(B)
    • B(g);N_GUARD::S(B),XB(g)
    • B(g);N_GUARD,SBLOCK::S(E),XP(e)
    • B(g);N_GUARD::S(B)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • R(f);XQ(C)::S(B)
      • Refutation
        • B(g);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Refutation
        • S(h);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • S(B)
    • Vars
      • R(f);S_CUTB(g)::S(B)
      • R(f);N_GUARD::QAB(C)
      • B(g);S_CUTR(f)::QAB(C)
      • S(h);OGATE::QAB(C)
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