MESON Chess Problem Database

Problem Display
PID: 248404 (1qb5/P2p1Qp1/2p5/4k2n/Rp3p2/b3P3/3NN1r1/1K1R2BB w - - 0 1)

Blikeng, Bjarne

Hjelle, David

Arbejder-Skak, 1949

1qb5/P2p1Qp1/2p5/4k2n/Rp3p2/b3P3/3NN1r1/1K1R2BB

#2

10 + 11

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg1
      • 2.Sc4#
    • 1...Rxe2
      • 2.Sc4#
    • 1...Rf2
      • 2.Sc4#
    • 1...Rh2
      • 2.Sc4#
    • 1...Rg3
      • 2.Sc4#
    • 1...Rg4
      • 2.Sc4#
    • 1...Rg5
      • 2.Sc4#
    • 1...Rg6
      • 2.Sc4#
    • 1...b3
      • 2.Sf3#
    • 1...d5
      • 2.axb8Q#
      • 2.axb8B#
  • Tries
    • 1.Qe7+?
      • 1...Kd5
        • 2.e4#
      • 1...Kf5!
    • 1.exf4+?
      • 1...Kd6
        • 2.axb8Q#
        • 2.axb8B#
      • 1...Sxf4!
  • Keys
    • 1.e4!
      • threat
        • 2.Qe7#
      • 1...Kd6
        • 2.axb8Q#
        • 2.axb8B#
      • 1...Qd6
        • 2.Qf5#
      • 1...Rg6
        • 2.Sc4#
      • 1...b3
        • 2.Sf3#
      • 1...d5
        • 2.axb8Q#
        • 2.axb8B#
      • 1...d6
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(a);P_PINR(B),XB(C)::S(E)
    • R(a);XS(F)::S(E)
    • R(a);::S(E)
    • P(c);::S(E)
    • P(h);N_GUARD::PXQ(j)=Q
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINR(a)::P(G)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • P(G);CHECK,XP(d)
      • Vars
        • K(e);S_FLIGHT::PXQ(j)=Q
      • Refutation
        • S(f);XP(G)
  • Actual
    • P(G);
    • Threat
      • QAR2(J)
    • Vars
      • K(e);S_FLIGHT::PXQ(j)=Q
      • Q(j);SBLOCK::QAR1(J)
      • R(a);::S(E)
      • P(c);::S(E)
      • P(h);N_GUARD::PXQ(j)=Q
      • P(h);SBLOCK::B(C)
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