MESON Chess Problem Database

Problem Display
PID: 96773 (8/6n1/1N2b1nN/2B1k3/7P/6P1/8/2K2Q1B w - - 0 1)

Umnov, German

Problemas, 1976

8/6n1/1N2b1nN/2B1k3/7P/6P1/8/2K2Q1B

#2

8 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sxh4
      • 2.Qf4#
    • 1...Se7
      • 2.Qf4#
    • 1...Sf8
      • 2.Qf4#
    • 1...Sh8
      • 2.Qf4#
    • 1...Sf5
      • 2.Sg4#
  • Tries
    • 1.Qf5+?
      • 1...Sxf5
        • 2.Sg4#
      • 1...Bxf5!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qa1#
      • 1...Kf6
        • 2.Sd7#
      • 1...Ba2
        • 2.Sd7#
      • 1...Bb3
        • 2.Sd7#
      • 1...Bh3
        • 2.Sc4#
      • 1...Bc4
        • 2.Sxc4#
        • 2.Sd7#
      • 1...Bg4
        • 2.Sc4#
      • 1...Bd5
        • 2.Sd7#
      • 1...Bf5
        • 2.Sc4#
      • 1...Bd7
        • 2.Sc4#
        • 2.Sxd7#
      • 1...Bf7
        • 2.Sd7#
      • 1...Bc8
        • 2.Sc4#
      • 1...Bg8
        • 2.Sd7#
      • 1...Sf5
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 5
  • Sets
    • S(c);N_GUARD::QAB1(B),XS(c)
    • S(c);N_GUARD,XP(E)::QAB1(B)
    • S(c);N_GUARD::QAB1(B)
    • S(d);S_CUTB(b)::S(H)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(d);SBLOCK,XQ(B)::S(H)
      • Refutation
        • B(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • K(a);S_FLIGHT::S(G)
      • B(b);N_GUARD::S(G)
      • S(d);SBLOCK,S_CUTB(b)::S(H)
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