MESON Chess Problem Database

Problem Display
PID: 186237 (2B2b2/2qnQ1p1/2P1n1NR/4rk1P/pRN5/K4P2/3B3r/8 w - - 0 1)

Klar, Eugene

Bulletin Ouvrier des Echecs, 1949

2B2b2/2qnQ1p1/2P1n1NR/4rk1P/pRN5/K4P2/3B3r/8

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Sd6#
    • 1...Qb6
      • 2.Sd6#
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qd8
      • 2.Sd6#
    • 1...Qa7
      • 2.Sd6#
    • 1...Qb7
      • 2.Sd6#
    • 1...Qxc8
      • 2.Sd6#
    • 1...Rhe2
      • 2.Sh4#
    • 1...Rf2
      • 2.Sh4#
    • 1...Rg2
      • 2.Sh4#
    • 1...Rh4
      • 2.Sxh4#
    • 1...Re3+
      • 2.Sxe3#
    • 1...Ra5
      • 2.Se3#
    • 1...Rb5
      • 2.Se3#
    • 1...Rc5
      • 2.Se3#
    • 1...Rd5
      • 2.Se3#
    • 1...Bxe7
      • 2.Sxe7#
    • 1...Sd4
      • 2.Qf7#
    • 1...Sec5
      • 2.Qf7#
    • 1...Sdc5
      • 2.Qg5#
    • 1...Sb6
      • 2.Qg5#
    • 1...Sb8
      • 2.Qg5#
  • Keys
    • 1.Rb5!
      • threat
        • 2.Se3#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Bxe7+
        • 2.Sxe7#
      • 1...Qb6
        • 2.Sd6#
      • 1...Qa7
        • 2.Sd6#
      • 1...Re2
        • 2.Sh4#
      • 1...Sec5
        • 2.Qf7#
      • 1...Sdc5
        • 2.Qg5#
      • 1...Sf6
        • 2.Bxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 15
  • Sets
    • Q(f);N_GUARD::S(E)
    • Q(f);N_GUARD,P_PINR(D)::S(E),XQ(f)
    • Q(f);N_GUARD,XB(K)::S(E)
    • R(a);N_GUARD::S(H)
    • R(a);N_GUARD::S(H),XR(a)
    • R(c);CHECK,N_GUARD::S(E),XR(c)
    • R(c);N_GUARD::S(E)
    • B(i);P_PINR(D),XQ(J)::S(H),XB(i)
    • S(e);P_SPINS(g)::QAR2(J)
    • S(g);P_SPINS(e)::QAR1(J)
  • Actual
    • R(D);P_PINR(c),P_SPINQ(J)
    • Threat
      • S(E)
    • Vars
      • Q(f);CHECK,N_GUARD,N_PINQ(J)::S(E),XQ(f)
      • B(i);CHECK,XQ(J)::S(H),XB(i)
      • Q(f);N_GUARD::S(E)
      • R(a);N_GUARD::S(H)
      • S(e);N_PINQ(J),N_SPINR(c),P_SPINS(g)::QAR2(J)
      • S(g);N_PINQ(J),N_SPINR(c),P_SPINS(e)::QAR1(J)
      • S(g);OGATE,P_SPINS(e)::B(K),XS(e)
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