MESON Chess Problem Database

Problem Display
PID: 254523 (b1B2K2/3Q4/6pp/4p3/2p1k1n1/4PN1r/4P3/2B2R1N w - - 0 1)

de Haas, Bastian Evert

Probleemblad, 1983

b1B2K2/3Q4/6pp/4p3/2p1k1n1/4PN1r/4P3/2B2R1N

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Sg3#
    • 1...Rxf3+
      • 2.exf3#
    • 1...Rg3
      • 2.Sxg3#
    • 1...Rh4
      • 2.Sg3#
    • 1...Rh5
      • 2.Sg3#
    • 1...Bd5
      • 2.Qxg4#
    • 1...Bc6
      • 2.Qxc6#
    • 1...Bb7
      • 2.Bxb7#
      • 2.Qxb7#
    • 1...Sf2
      • 2.Sxf2#
    • 1...Sh2
      • 2.Sf2#
    • 1...Sxe3
      • 2.Sd2#
    • 1...Sf6
      • 2.Sf2#
    • 1...c3
      • 2.Qd3#
    • 1...h5
      • 2.Sg5#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Qxc4#
      • 1...Sxe3
        • 2.Qxe5#
      • 1...Bd5
        • 2.Qb1#
      • 1...c3
        • 2.Qd3#
        • 2.Qc4#
      • 1...Rxf3+!
    • 1.Qe6?
      • threat
        • 2.Qxc4#
      • 1...Sxe3
        • 2.Qxe5#
      • 1...Bd5
        • 2.Qxg4#
        • 2.Qxg6#
      • 1...c3
        • 2.Qc4#
      • 1...Rxf3+!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qxc4#
      • 1...Rxf3
        • 2.Qxf3#
      • 1...Sxe3
        • 2.Sf2#
      • 1...Bd5
        • 2.Qxg6#
      • 1...c3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD::S(C)
    • R(a);CHECK,OGATE,XS(F)::P(D),XR(a)
    • R(a);N_GUARD::S(C),XR(a)
    • B(h);SBLOCK::QAR2(G),XS(d)
    • B(h);N_GUARD::QAB(G),XB(h)
    • S(d);N_GUARD::S(C),XS(d)
    • S(d);N_GUARD::S(C)
    • S(d);SBLOCK,XP(E)::S(F)
    • P(b);N_GUARD::QAB1(G)
    • P(g);N_GUARD::S(F)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR2(G),XP(b)
      • Vars
        • S(d);N_GUARD,XP(E)::QAR1(G),XP(e)
        • B(h);SBLOCK::QAB(G)
      • Refutation
        • R(a);CHECK,XS(F)
    • Try
      • Q(G);P_PINP(e)
      • Threat
        • QAR2(G),XP(b)
      • Vars
        • S(d);N_GUARD,XP(E)::QAR1(G),XP(e)
        • P(b);::QAR2(G)
      • Refutation
        • R(a);CHECK,XS(F)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G),XP(b)
    • Vars
      • R(a);OGATE,P_PINQ(G),XS(F)::QAB1(G),XR(a)
      • S(d);N_GUARD,XP(E)::S(C)
      • B(h);SBLOCK::QAB(G),XP(f)
      • P(b);::QAR2(G)
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