MESON Chess Problem Database

Problem Display
PID: 222896 (8/r1n3pQ/3B4/p6p/3kN3/5p2/B3PP2/b2Kn3 w - - 0 1)

Modin, Carl Edvin

Tidskrift for Schack, 1910

8/r1n3pQ/3B4/p6p/3kN3/5p2/B3PP2/b2Kn3

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.e3#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Bc5#
        • 2.Be5#
        • 2.Qe5#
      • 1...Sd3
        • 2.e3#
      • 1...Sa6
        • 2.Be5#
        • 2.Qd5#
        • 2.Qe5#
      • 1...Se6
        • 2.Be5#
        • 2.Qd5#
        • 2.Qe5#
      • 1...fxe2+!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qxg7#
      • 1...fxe2+
        • 2.Sxe2#
      • 1...Kxc3
        • 2.Qxg7#
      • 1...Bxc3
        • 2.e3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sb5
        • 2.Sxb5#
      • 1...Sd5
        • 2.Sb5#
      • 1...Sa6
        • 2.Sb5#
      • 1...Se6
        • 2.Sb5#
      • 1...Sa8
        • 2.Sb5#
      • 1...Se8
        • 2.Sb5#
      • 1...g5
        • 2.Qg7#
        • 2.Qh8#
      • 1...g6
        • 2.Qg7#
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::P(C)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);SBLOCK::P(C)
      • Refutation
        • P(c);CHECK,XP(C)
  • Actual
    • S(E);
    • Threat
      • QAB(G),XP(i)
    • Vars
      • P(c);CHECK,XP(C)::S(E),XP(c)
      • K(d);S_FLIGHT,XS(E)::QAB(G),XP(i)
      • B(a);SBLOCK,XS(E)::P(C)
      • S(b);N_GUARD::QAR1(G),XS(b)
      • S(h);N_GUARD::S(E),XS(h)
      • S(h);N_GUARD::S(E)
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