MESON Chess Problem Database

Problem Display
PID: 249312 (8/3pQ1p1/3p2Rq/4nN1P/2PNkP2/4p2n/2P1B3/1b2K3 w - - 0 1)

Hannelius, Jan Ingvar

Jerusalem Post, 1951

(First published on Fri Jun 29 1951)

8/3pQ1p1/3p2Rq/4nN1P/2PNkP2/4p2n/2P1B3/1b2K3

#2

10 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Bd3#
    • 1...Sxf4
      • 2.Bf3#
    • 1...d5
      • 2.Qxe5#
  • Tries
    • 1.Sxd6+?
      • 1...Kxd4
        • 2.Qxe5#
      • 1...Kxf4!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Qxe5#
      • 1...Sd3+
        • 2.Bxd3#
      • 1...Sf3+
        • 2.Bxf3#
      • 1...Kxf4
        • 2.Rg4#
      • 1...Qxf4
        • 2.Qd5#
      • 1...Sxf4
        • 2.Sg3#
      • 1...Sxc4
        • 2.Sg3#
        • 2.Bd3#
        • 2.Bf3#
      • 1...Sxg6
        • 2.Sg3#
        • 2.Bd3#
        • 2.Bf3#
      • 1...Sg4
        • 2.Sg3#
        • 2.Bd3#
        • 2.Bf3#
      • 1...Sc6
        • 2.Sg3#
        • 2.Bd3#
        • 2.Bf3#
      • 1...Sf7
        • 2.Sg3#
        • 2.Bd3#
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(g);SBLOCK,XP(F)::B(C)
    • S(c);SBLOCK,XP(F)::B(C)
    • P(f);N_GUARD::QAR1(J),XS(e)
  • Tries
    • Try
      • S(G);CHECK,XP(f)
      • Vars
        • K(d);N_SPINS(e),P-FLIGHT,XS(E)::QAB1(J),XS(e)
      • Refutation
        • K(d);N_SPINS(e),P-FLIGHT,XP(F)
  • Actual
    • Q(J);N_PINS(e),XP(f)
    • Threat
      • QAR1(J),XS(e)
    • Vars
      • S(e);CHECK,N_GUARD::B(C),XS(e)
      • K(d);OGATEB,P-FLIGHT,P_SPINS(e),XP(F)::R1(I)
      • Q(g);SBLOCK,XP(F)::QAB1(J)
      • S(c);SBLOCK,XP(F)::S(G)
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