MESON Chess Problem Database

Problem Display
PID: 260711 (2BN2b1/r2RP3/qpNp1bP1/RQn1nk1K/r5p1/5PB1/8/8 w - - 0 1)

Lipton, Michael

The Problemist, 1967

2BN2b1/r2RP3/qpNp1bP1/RQn1nk1K/r5p1/5PB1/8/8

#2

11 + 11

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sd4#
    • 1...Ra2
      • 2.Sd4#
    • 1...Ra3
      • 2.Sd4#
    • 1...Rd4
      • 2.Sxd4#
    • 1...Rxa5
      • 2.Sd4#
    • 1...Bc4
      • 2.Sd4#
    • 1...Se4
      • 2.fxg4#
    • 1...Sc4
      • 2.Qb1#
    • 1...Sf7
      • 2.Rb7#
  • Keys
    • 1.e8S!
      • threat
        • 2.Sxd6#
      • 1...Bxd8
        • 2.Rf7#
      • 1...Rd4
        • 2.Sxd4#
      • 1...Bh4
        • 2.Rf7#
      • 1...Bg5
        • 2.Rf7#
      • 1...Be7
        • 2.Sxe7#
      • 1...Bg7
        • 2.Se7#
        • 2.Rf7#
      • 1...Bh8
        • 2.Se7#
        • 2.Rf7#
      • 1...Se4
        • 2.fxg4#
      • 1...Sb7
        • 2.Rf7#
      • 1...Sc4
        • 2.Qb1#
      • 1...Sf7
        • 2.Rb7#
      • 1...d5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::S(F)
    • R(a);N_GUARD::S(F),XR(a)
    • R(a);N_GUARD,XR(C)::S(F)
    • B(k);S_CUTR(a)::S(F)
    • S(c);P_SPINS(d),SBLOCK,S_CUTR(a)::P(A),XP(b)
    • S(d);N_GUARD,P_SPINS(c),S_CUTQ(f),S_CUTR(a)::QAB(D)
    • S(d);N_GUARD,P_SPINS(c),S_CUTB(k)::B(J)+R(H)
  • Actual
    • P(I);
    • Threat
      • S(I),XP(h)
    • Vars
      • B(i);XS(K)::B(J)+R(H),DCHECK
      • R(a);N_GUARD::S(F),XR(a)
      • B(i);::B(J)+R(H),DCHECK
      • B(i);N_GUARD::S(F),XB(i)
      • S(c);P_SPINS(d),SBLOCK,S_CUTR(a)::P(A),XP(b)
      • S(c);N_GUARD,P_SPINS(d),S_CUTQ(f),S_CUTR(j)::B(J)+R(H)
      • S(d);N_GUARD,P_SPINS(c),S_CUTQ(f),S_CUTR(a)::QAB(D)
      • S(d);N_GUARD,P_SPINS(c),S_CUTB(k)::B(J)+R(H)
      • P(h);::S(I)
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