MESON Chess Problem Database

Problem Display
PID: 119625 (7k/4R3/5p2/4pn2/3p4/3R2QK/8/8 w - - 0 1)

Maslov, S

Gorkovskaya Pravda, 1969

7k/4R3/5p2/4pn2/3p4/3R2QK/8/8

#2

4 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qg7#
    • 1...Sh4
      • 2.Qg7#
    • 1...Sd6
      • 2.Qg7#
    • 1...Sh6
      • 2.Qg7#
    • 1...Sg7
      • 2.Qxg7#
    • 1...e4
      • 2.Qb8#
  • Tries
    • 1.Ra3?
      • threat
        • 2.Ra8#
      • 1...Sg7
        • 2.Qxg7#
      • 1...Sd6
        • 2.Qg7#
      • 1...Sh6
        • 2.Qg7#
      • 1...Sxe7!
    • 1.Rb3?
      • threat
        • 2.Rb8#
      • 1...Sg7
        • 2.Qxg7#
      • 1...Sd6
        • 2.Qg7#
      • 1...Sh6
        • 2.Qg7#
      • 1...Sxe7!
    • 1.Rf7?
      • 1...Sg7
        • 2.Qxg7#
      • 1...Se3
        • 2.Qg7#
      • 1...Sh4
        • 2.Qg7#
      • 1...Sd6
        • 2.Qg7#
      • 1...Sh6
        • 2.Qg7#
      • 1...Se7
        • 2.Qg7#
      • 1...e4
        • 2.Qb8#
      • 1...Sxg3!
    • 1.Qg6?
      • threat
        • 2.Rh7#
        • 2.Re8#
        • 2.Qh7#
        • 2.Qe8#
      • 1...Sg7
        • 2.Qxg7#
      • 1...Sd6
        • 2.Rh7#
        • 2.Qh7#
        • 2.Qg7#
      • 1...Sh6
        • 2.Rh7#
        • 2.Qh7#
        • 2.Qg7#
      • 1...Sxe7!
  • Keys
    • 1.Rxd4!
      • threat
        • 2.Rd8#
      • 1...Sxd4
        • 2.Qg7#
      • 1...Sxe7
        • 2.Rh4#
      • 1...exd4
        • 2.Qb8#
      • 1...Sg7
        • 2.Qxg7#
      • 1...Sd6
        • 2.Rh4#
        • 2.Qg7#
      • 1...Sh6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::QAB1(B)
    • S(c);N_GUARD::QAB1(B),XS(c)
    • P(b);OGATE::QAR(B)
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • S(c);XR(D)
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • S(c);XR(D)
    • Try
      • R(D);
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
        • P(b);OGATE::QAR(B)
      • Refutation
        • S(c);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(4)
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
      • Refutation
        • S(c);XR(D)
  • Actual
    • R(A);XP(a)
    • Threat
      • R(A)
    • Vars
      • S(c);N_GUARD,XR(A)::QAB1(B)
      • S(c);N_GUARD,XR(D)::R(A)
      • P(b);OGATE,XR(A)::QAR(B)
      • S(c);N_GUARD::QAB1(B),XS(c)
      • S(c);N_GUARD::QAB1(B)
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