MESON Chess Problem Database

Problem Display
PID: 231149 (KQ4n1/2p3B1/5r2/2p5/1N6/1R2n3/N5p1/k4bR1 w - - 0 1)

Levman, Semyon Semyonovich

Trud (Moscow), 1927

KQ4n1/2p3B1/5r2/2p5/1N6/1R2n3/N5p1/k4bR1

#2

7 + 8

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sh6
      • 2.Bxf6#
    • 1...Se7
      • 2.Bxf6#
    • 1...c6
      • 2.Qe5#
  • Tries
    • 1.Sc2+?
      • 1...Kxa2
        • 2.Rb2#
        • 2.Ra3#
      • 1...Sxc2!
  • Keys
    • 1.Qa7!
      • 1...cxb4
        • 2.Sxb4#
      • 1...Sd1
        • 2.Sc2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sc4
        • 2.Sc2#
      • 1...Sg4
        • 2.Sc2#
      • 1...Sd5
        • 2.Sc2#
      • 1...Sf5
        • 2.Sc2#
      • 1...Sh6
        • 2.Bxf6#
      • 1...Se7
        • 2.Bxf6#
      • 1...c4
        • 2.Sc1#
      • 1...c6
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(h);N_GUARD::B(E),XR(f)
    • P(g);OGATE::QAB(G)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • S(d);XS(D)
  • Actual
    • Q(G);
    • Vars
      • P(e);XS(D)::QAR(G)+S(B),XP(e)
      • S(d);N_GUARD,N_SPINB(b)::S(D)
      • S(d);N_GUARD::S(D),XS(d)
      • S(d);N_GUARD::S(D)
      • S(h);N_GUARD::B(E),XR(f)
      • P(e);::QAR(G)+S(B)
      • P(g);::QAR(G)+S(B)
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