MESON Chess Problem Database

Problem Display
PID: 243470 (2R2N2/5p2/2nP1P2/3kP3/r2PN1Q1/BPP1KnP1/1p3P2/3R3B w - - 0 1)

Buchwald, Julius

Parallele 50, 1948

2R2N2/5p2/2nP1P2/3kP3/r2PN1Q1/BPP1KnP1/1p3P2/3R3B

#2

16 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.c4#
    • 1...Ra5
      • 2.c4#
    • 1...Ra6
      • 2.c4#
    • 1...Ra7
      • 2.c4#
    • 1...Ra8
      • 2.c4#
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sg5
      • 2.Sxg5#
    • 1...Sb4
      • 2.Rc5#
      • 2.c4#
    • 1...Sxd4
      • 2.Rc5#
    • 1...Sa5
      • 2.Rc5#
    • 1...Sxe5
      • 2.Rc5#
    • 1...Sa7
      • 2.Rc5#
    • 1...Se7
      • 2.Rc5#
    • 1...Sb8
      • 2.Rc5#
    • 1...Sd8
      • 2.Rc5#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Sf4#
      • 1...Rxd4
        • 2.c4#
      • 1...Sfxd4
        • 2.Sc5#
        • 2.Sg5#
      • 1...Scxd4
        • 2.Rc5#
      • 1...fxg6!
    • 1.Sd7?
      • threat
        • 2.Sb6#
      • 1...Rxd4
        • 2.c4#
      • 1...Sfxd4
        • 2.Sec5#
        • 2.Sg5#
      • 1...Scxd4
        • 2.Rc5#
      • 1...Ra6
        • 2.c4#
      • 1...Rb4!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qxf7#
      • 1...Rxd4
        • 2.c4#
      • 1...Sfxd4
        • 2.Sc5#
      • 1...Sfxe5
        • 2.Sd2#
      • 1...Scxd4
        • 2.Rc5#
      • 1...Scxe5
        • 2.Rc5#
      • 1...Ra7
        • 2.c4#
      • 1...Sg5
        • 2.Sxg5#
      • 1...Sd8
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(c);N_GUARD,XB(D)::P(F)
    • R(c);N_GUARD::P(F)
    • S(b);::B(B)+S(J),XS(b)
    • S(e);OGATE,P_SPINS(e),XP(I)::R1(O)
    • S(e);OGATE::R1(O)
    • S(e);OGATE,XP(L)::R1(O)
  • Tries
    • Try
      • S(P);
      • Threat
        • S(P)
      • Vars
        • R(c);N_GUARD,P_SPINR(c),XP(I)::P(F)
        • S(e);OGATE,P_SPINS(e),XP(I)::R1(O)
      • Refutation
        • P(f);XS(P)
    • Try
      • S(P);
      • Threat
        • S(P)
      • Vars
        • R(c);N_GUARD,P_SPINR(c),XP(I)::P(F)
        • S(e);OGATE,P_SPINS(e),XP(I)::R1(O)
        • R(c);N_GUARD::P(F)
      • Refutation
        • R(c);
  • Actual
    • Q(K);
    • Threat
      • QAB(K),XP(f)
    • Vars
      • R(c);N_GUARD,P_SPINR(c),XP(I)::P(F)
      • S(b);P_SPINS(b),XP(I)::B(B)+S(J)
      • S(b);P_SPINS(b),XP(L)::B(B)+S(J)
      • S(e);OGATE,P_SPINS(e),XP(I)::R1(O)
      • S(e);OGATE,P_SPINS(e),XP(L)::R1(O)
      • R(c);N_GUARD::P(F)
      • S(b);::B(B)+S(J),XS(b)
      • S(e);OGATE::R1(O)
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