MESON Chess Problem Database

Problem Display
PID: 115660 (2b5/8/7R/3pnk2/8/3P1P1N/8/B1KQ4 w - - 0 1)

Legers, V

USSR Team Championship, 1949

2b5/8/7R/3pnk2/8/3P1P1N/8/B1KQ4

#2

7 + 4

113 Shakhmaty v SSSR 1950
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd3+
      • 2.Qxd3#
    • 1...Sxf3
      • 2.Qxf3#
    • 1...Sc4
      • 2.Rf6#
    • 1...Sg4
      • 2.fxg4#
    • 1...Sc6
      • 2.Rf6#
    • 1...Sf7
      • 2.Rf6#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg5#
      • 1...Sxf3
        • 2.Rf6#
        • 2.Qg6#
      • 1...Sg6
        • 2.Qg4#
        • 2.Qxg6#
      • 1...Sg4
        • 2.Qxg4#
        • 2.fxg4#
      • 1...Sf7
        • 2.Rf6#
        • 2.Qg4#
        • 2.Qg6#
      • 1...Sxd3+!
    • 1.Qd2?
      • threat
        • 2.Qf4#
        • 2.Qg5#
      • 1...Sxd3+
        • 2.Qxd3#
      • 1...Sxf3
        • 2.Qf4#
      • 1...Sf7
        • 2.Rf6#
        • 2.Qf4#
      • 1...Sg6!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxe5#
      • 1...Sxd3+
        • 2.Qxd3#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Sc4
        • 2.Rf6#
      • 1...Sg4
        • 2.fxg4#
      • 1...Sc6
        • 2.Rf6#
      • 1...Sg6
        • 2.Rh5#
      • 1...Sd7
        • 2.Qe6#
      • 1...Sf7
        • 2.Rf6#
      • 1...d4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);CHECK,OGATE,XP(D)::QAB(C),XS(b)
    • S(b);OGATE,XP(E)::QAR2(C),XS(b)
    • S(b);::R1(G)
    • S(b);OGATE::P(E),XS(b)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Refutation
        • S(b);CHECK,XP(D)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);CHECK,OGATE,XP(D)::QAB(C),XS(b)
        • S(b);XP(E)::QAR1(C)
      • Refutation
        • S(b);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XS(b)
    • Vars
      • S(b);CHECK,OGATE,XP(D)::QAB(C),XS(b)
      • S(b);OGATE,XP(E)::QAR2(C),XS(b)
      • S(b);::R1(G)
      • S(b);OGATE::P(E),XS(b)
      • S(b);SBLOCK::R(G)
      • S(b);OGATE::QAB1(C)
      • P(a);N_GUARD::QAB1(C)
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