MESON Chess Problem Database

Problem Display
PID: 102119 (1K3b2/2p5/3Np3/4k1P1/1p2P3/n2PP3/5r2/3Q4 w - - 0 1)

Mach, Julius Zdenek

Obrazkova Revue, 1900

1K3b2/2p5/3Np3/4k1P1/1p2P3/n2PP3/5r2/3Q4

#2

7 + 7

15 British Chess Magazine 1910
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Sf7#
    • 1...Rb2
      • 2.Sf7#
    • 1...Rc2
      • 2.Sf7#
    • 1...Rd2
      • 2.Sf7#
    • 1...Re2
      • 2.Sf7#
    • 1...Rg2
      • 2.Sf7#
    • 1...Rh2
      • 2.Sf7#
    • 1...Rf7
      • 2.Sxf7#
    • 1...Sb1
      • 2.Sc4#
    • 1...Sc2
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sb5
      • 2.Sc4#
  • Tries
    • 1.Qa1+?
      • 1...Rb2
        • 2.Sf7#
      • 1...Kxd6!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qc5#
      • 1...Kxd6
        • 2.Qxc7#
      • 1...Rxc2
        • 2.Sf7#
      • 1...Bxd6
        • 2.d4#
      • 1...Sxc2
        • 2.Sc4#
      • 1...cxd6
        • 2.d4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...c5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD::S(F)
    • R(a);N_GUARD::S(F),XR(a)
    • S(b);N_GUARD::S(F)
    • S(b);N_GUARD::S(F),XS(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);P_SPINR(a)::S(F)
      • Refutation
        • K(d);S_FLIGHT,XS(F)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(A),XP(f)
      • R(a);N_GUARD,XQ(A)::S(F)
      • B(g);SBLOCK,XS(F)::P(B)
      • S(b);N_GUARD,XQ(A)::S(F)
      • P(f);SBLOCK,XS(F)::P(B)
      • S(b);N_GUARD::S(F),XS(b)
      • P(f);::QAR2(A),XP(f)
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