MESON Chess Problem Database

Problem Display
PID: 249013 (6BK/4p2N/4n3/1rRpk3/4N1P1/2Pn2R1/2p2P1B/2qr1b1Q w - - 0 1)

Blikeng, Bjarne

2nd Prize, Postsjakk, 1976

6BK/4p2N/4n3/1rRpk3/4N1P1/2Pn2R1/2p2P1B/2qr1b1Q

#2

11 + 10

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Rg1#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Re3#
      • 1...Kf4
        • 2.Rg1#
        • 2.Rg2#
      • 1...Kd6
        • 2.Qxd5#
      • 1...Sef4
        • 2.Sc4#
      • 1...Sdf4!
    • 1.Seg5?
      • threat
        • 2.Re3#
      • 1...Kf4
        • 2.Rg1#
        • 2.Rg2#
      • 1...Kd6
        • 2.Qxd5#
      • 1...Qe3
        • 2.Rxe3#
      • 1...Qf4
        • 2.Qxd5#
      • 1...Sdf4
        • 2.Sf7#
      • 1...Sef4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Re3#
      • 1...Kf4
        • 2.Rg1#
      • 1...Kxd6
        • 2.Qxd5#
      • 1...Qe3
        • 2.Rxe3#
      • 1...Qf4
        • 2.Qxd5#
      • 1...Sdf4
        • 2.Sf7#
      • 1...Sef4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(h);N_SPINP(g),S_FLIGHT::B(C)+R(E)
  • Tries
    • Try
      • S(F);
      • Threat
        • B(C)+R(E),DCHECK
      • Vars
        • K(h);N_SPINP(g),S_FLIGHT::QAR1(A),XP(g)
        • S(i);SBLOCK::S(F)
      • Refutation
        • S(e);
    • Try
      • S(F);
      • Threat
        • B(C)+R(E),DCHECK
      • Vars
        • K(h);N_SPINP(g),S_FLIGHT::QAR1(A),XP(g)
        • Q(a);::B(C)+R(E),DCHECK,XQ(a)
        • Q(a);SBLOCK::QAR1(A),XP(g)
        • S(e);SBLOCK::S(F)
      • Refutation
        • S(i);
  • Actual
    • S(F);
    • Threat
      • B(C)+R(E),DCHECK
    • Vars
      • K(h);N_SPINP(g),S_FLIGHT::B(C)+R(E)
      • K(h);N_SPINP(g),S_FLIGHT,XS(F)::QAR1(A),XP(g)
      • Q(a);::B(C)+R(E),DCHECK,XQ(a)
      • Q(a);SBLOCK::QAR1(A),XP(g)
      • S(e);SBLOCK::S(F)
      • S(i);SBLOCK::S(F)
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