MESON Chess Problem Database

Problem Display
PID: 214679 (8/8/1Q1pNp2/1N1qpk1K/4R3/1B2p3/4P3/8 w - - 0 1)

Klark, Dmitry Vasilevich

Shakhmatny Listok, 1878

8/8/1Q1pNp2/1N1qpk1K/4R3/1B2p3/4P3/8

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Sxd6#
    • 1...Qb7
      • 2.Sxd6#
    • 1...Qa8
      • 2.Sxd6#
  • Tries
    • 1.Qxe3?
      • threat
        • 2.Sg7#
      • 1...Qxe6
        • 2.Qf3#
      • 1...Qb7
        • 2.Sxd6#
        • 2.Qf3#
      • 1...Kxe6!
  • Keys
    • 1.Qb7!
      • 1...Kxe4
        • 2.Sxd6#
        • 2.Bc2#
      • 1...Kxe6
        • 2.Sd4#
      • 1...Qxb3
        • 2.Sg7#
      • 1...Qxe4
        • 2.Sxd6#
        • 2.Qh7#
      • 1...Qxe6
        • 2.Qh7#
      • 1...Qxb7
        • 2.Sxd6#
      • 1...Qxb5
        • 2.Sg7#
        • 2.Qh7#
      • 1...Qc4
        • 2.Sg7#
      • 1...Qc6
        • 2.Qh7#
      • 1...Qd1
        • 2.Sg7#
        • 2.Qh7#
      • 1...Qd2
        • 2.Sg7#
        • 2.Qh7#
      • 1...Qd3
        • 2.Sg7#
        • 2.Qh7#
      • 1...Qd4
        • 2.Sg7#
        • 2.Qh7#
      • 1...Qc5
        • 2.Sg7#
        • 2.Qh7#

This is a version of 208790

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD,XR(C)::S(D),XP(e)
    • Q(b);N_GUARD::S(D),XP(e)
  • Tries
    • Try
      • Q(F);XP(a)
      • Threat
        • S(G)
      • Vars
        • Q(b);XS(G)::QAR2(F)
      • Refutation
        • K(d);P_SPINP(c),P_SPINQ(b),S_FLIGHT,XS(G)
  • Actual
    • Q(F);
    • Vars
      • K(d);P_SPINP(c),P_SPINQ(b),S_FLIGHT,XS(G)::S(D)
      • Q(b);XB(B)::S(G)
      • Q(b);XS(G)::QAB(F)
      • Q(b);N_GUARD,XQ(F)::S(D),XP(e)
      • Q(b);::S(G)
      • Q(b);::QAB(F)
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