MESON Chess Problem Database

Problem Display
PID: 129766 (8/3pn3/3N4/1K1kpq2/4N3/3pP2B/1bP3Q1/8 w - - 0 1)

Semerad, Bohumil

Casopis ceskoslovenskych sachistu, 1911

8/3pn3/3N4/1K1kpq2/4N3/3pP2B/1bP3Q1/8

#2

7 + 7

6490 yacpdb 2009
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.c4#
    • 1...Qg6
      • 2.c4#
    • 1...Qh7
      • 2.c4#
    • 1...Qf1
      • 2.c4#
    • 1...Qf2
      • 2.c4#
    • 1...Qf3
      • 2.c4#
    • 1...Qf4
      • 2.c4#
    • 1...Qg5
      • 2.c4#
    • 1...Qh5
      • 2.c4#
    • 1...Qf6
      • 2.c4#
    • 1...Qf7
      • 2.c4#
    • 1...Qf8
      • 2.c4#
  • Tries
    • 1.Qg8+?
      • 1...Qe6
        • 2.c4#
      • 1...Qf7
        • 2.Qxf7#
        • 2.c4#
      • 1...Sxg8!
  • Keys
    • 1.Se8!
      • threat
        • 2.Sc7#
      • 1...Ke6
        • 2.Sg5#
      • 1...Qxe4
        • 2.c4#
      • 1...Qf3
        • 2.S4f6#

This anticipates 194055(1917)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • Q(e);::P(A)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • Q(e);P_SPINQ(e)::P(A)
      • Refutation
        • S(g);XQ(B)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(c);P_SPINQ(e),S_FLIGHT::S(E)
      • Q(e);P_SPINQ(e),XS(E)::P(A)
      • Q(e);::S(E)
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