MESON Chess Problem Database

Problem Display
PID: 120031 (8/3N3K/2np4/5P1N/1nBbk1P1/4pp2/2P5/1b1Q4 w - - 0 1)

Borgstrom, Nils

Dagens Nyheter, 1926

8/3N3K/2np4/5P1N/1nBbk1P1/4pp2/2P5/1b1Q4

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qd3#
    • 1...Sxc2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sd5
      • 2.Bd3#
      • 2.Qd3#
    • 1...Sa6
      • 2.Qd3#
    • 1...Se5
      • 2.Sdf6#
    • 1...f2
      • 2.Qh1#
  • Tries
    • 1.Bd3+?
      • 1...Kd5
        • 2.Sf4#
        • 2.Qxf3#
        • 2.c4#
      • 1...Sxd3!
    • 1.Bd5+?
      • 1...Sxd5
        • 2.Qd3#
      • 1...Kxd5!
  • Keys
    • 1.Be2!
      • threat
        • 2.Bxf3#
      • 1...Kd5
        • 2.Shf6#
      • 1...fxe2
        • 2.Qh1#
      • 1...Se5
        • 2.Sdf6#
      • 1...f2
        • 2.Bf3#
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(d);N_GUARD::QAB1(A)
    • S(d);N_GUARD,XP(B)::QAB1(A)
    • S(d);N_GUARD::QAB1(A),XS(d)
    • S(g);SBLOCK,S_CUTB(e)::S(G)
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • S(d);XB(C)
    • Try
      • B(C);CHECK
      • Vars
        • S(d);SBLOCK,XB(C)::QAB1(A)
      • Refutation
        • K(f);P_SPINB(e),S_FLIGHT,XB(C)
  • Actual
    • B(C);
    • Threat
      • B(C),XP(c)
    • Vars
      • K(f);P_SPINB(e),S_FLIGHT::S(F)
      • P(c);OGATEB,XB(C)::QAB(A)
      • S(g);SBLOCK,S_CUTB(e)::S(G)
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