MESON Chess Problem Database

Problem Display
PID: 197780 (r5B1/1P3N2/1P2n2K/1P1k2pR/1P1pnB2/5N2/r5Q1/2R5 w - - 0 1)

Prins, Hendrik

Probleemblad, 1980

r5B1/1P3N2/1P2n2K/1P1k2pR/1P1pnB2/5N2/r5Q1/2R5

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Rd2
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Re2
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Rf2
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Rxg2
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Rb8
      • 2.Qxa2#
    • 1...Rd8
      • 2.Qxa2#
    • 1...Re8
      • 2.Qxa2#
    • 1...Rf8
      • 2.Qxa2#
    • 1...Rxg8
      • 2.Qxa2#
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sd8
      • 2.Sxd8#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qxe4#
      • 1...Rxd2
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Sc5!
    • 1.S3xg5?
      • threat
        • 2.Qxe4#
      • 1...Rxg2
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Sxg5
        • 2.Sd8#
      • 1...Re2
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Rc2!
    • 1.Qxg5+?
      • 1...S6xg5
        • 2.Sd8#
      • 1...S4xg5!
  • Keys
    • 1.S7xg5!
      • threat
        • 2.Bxe6#
      • 1...Rxg8
        • 2.Qxa2#
      • 1...Sxg5
        • 2.Sd2#
      • 1...Re8
        • 2.Qxa2#
      • 1...Sc5
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::PXR(g)=Q
    • R(a);N_GUARD,XQ(B)::PXR(g)=Q
    • R(g);N_GUARD::QAB(B),XR(a)
    • R(g);N_GUARD,XB(L)::QAB(B),XR(a)
    • S(c);::QAB(B)+S(C),XS(c)
    • S(f);::B(L)+S(K),XS(f)
  • Tries
    • Try
      • S(C);P_PINS(c)
      • Threat
        • QAB1(B),XS(c)
      • Vars
        • R(a);N_GUARD,XS(C)::PXR(g)=Q
      • Refutation
        • S(f);
    • Try
      • S(C);P_PINS(c),XP(e)
      • Threat
        • QAB1(B),XS(c)
      • Vars
        • R(a);N_GUARD,N_SPINS(c),XQ(B)::PXR(g)=Q
        • S(f);XS(C)::B(L)+S(K)
        • R(a);N_GUARD::PXR(g)=Q
        • S(f);N_GUARD::R1(A),XS(f)
      • Refutation
        • R(a);
    • Try
      • Q(B);CHECK,XP(e)
      • Vars
        • S(f);P_SPINS(f),S_CUTS(c),XQ(B)::B(L)+S(K)
      • Refutation
        • S(c);P_SPINS(c),XQ(B)
  • Actual
    • S(K);P_PINS(f),XP(e)
    • Threat
      • B(L),XS(f)
    • Vars
      • R(g);N_GUARD,N_SPINS(f),XB(L)::QAB(B),XR(a)
      • S(c);N_SPINS(f),P_SPINS(c),XS(K)::QAB(B)+S(C)
      • R(g);N_GUARD::QAB(B),XR(a)
      • S(c);N_GUARD::R1(A),XS(c)
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