MESON Chess Problem Database

Problem Display
PID: 120017 (3n1N2/Q7/2RP1pp1/4k2b/4B1R1/q4n1N/3P4/2b4K w - - 0 1)

Mach, Julius Zdenek

Casopis ceskoslovenskych sachistu, 1913

3n1N2/Q7/2RP1pp1/4k2b/4B1R1/q4n1N/3P4/2b4K

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Qc5#
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qa1
      • 2.Qc5#
    • 1...Qa4
      • 2.Qc5#
    • 1...Qa6
      • 2.Qc5#
    • 1...Se1
      • 2.d4#
    • 1...Sg1
      • 2.d4#
    • 1...Sh2
      • 2.d4#
    • 1...Sh4
      • 2.d4#
    • 1...Sg5
      • 2.d4#
    • 1...Se6
      • 2.Sd7#
    • 1...f5
      • 2.Qg7#
  • Tries
    • 1.Sxg6+?
      • 1...Ke6
        • 2.Shf4#
        • 2.Qe7#
      • 1...Bxg6!
    • 1.Rc5+?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Qxc5
        • 2.Qxc5#
      • 1...Kd4!
    • 1.Qa5+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Qxa5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sd7#
      • 1...Qxd6
        • 2.Sxf3#
      • 1...Qxa7
        • 2.Sxf3#
      • 1...Bxg4
        • 2.Sxg6#
      • 1...Sxg5
        • 2.d4#
      • 1...Sxc6
        • 2.Sf7#
      • 1...fxg5
        • 2.Qg7#
      • 1...Qc5
        • 2.Sxf3#
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::QAR2(H)
    • Q(b);N_GUARD::QAR2(H),XQ(b)
    • S(c);N_GUARD::P(B)
    • S(h);SBLOCK::S(I)
    • P(f);OGATEB::QAB(H)
  • Tries
    • Try
      • S(I);CHECK,XP(g)
      • Refutation
        • B(e);XS(I)
    • Try
      • R(F);CHECK
      • Vars
        • K(d);S_FLIGHT,XP(G)::QAB1(H)
        • Q(b);OGATE,XR(F)::QAR2(H),XQ(b)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(H)
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(H),XQ(b)
      • Refutation
        • Q(b);XQ(H)
  • Actual
    • S(C);
    • Threat
      • S(I)
    • Vars
      • Q(b);N_GUARD,XP(G)::S(C),XS(c)
      • Q(b);N_GUARD,XQ(H)::S(C),XS(c)
      • B(e);N_GUARD,XR(E)::S(I),XP(g)
      • S(c);N_GUARD,XS(C)::P(B)
      • S(h);N_GUARD,XR(F)::S(C)
      • P(f);OGATEB,XS(C)::QAB(H)
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