MESON Chess Problem Database

Problem Display
PID: 246719 (8/3R3K/4p3/4kN2/7Q/8/6P1/8 w - - 0 1)

Shumarin, Vladimir Pavlovich

Moscow Ty., 2007

8/3R3K/4p3/4kN2/7Q/8/6P1/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rd4?
      • 1...Kxf5
        • 2.Qf4#
      • 1...exf5!
    • 1.Rd6?
      • 1...exf5
        • 2.Qd4#
      • 1...Kxf5!
    • 1.Qg5?
      • threat
        • 2.Sg3#
      • 1...Ke4
        • 2.Sg3#
      • 1...exf5!
    • 1.Qf6+?
      • 1...Ke4
        • 2.Rd4#
      • 1...Kf4
        • 2.Rd4#
      • 1...Kxf6!
    • 1.Qf4+?
      • 1...Kf6
        • 2.Se3#
        • 2.Sg3#
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
      • 1...Kxf4!
  • Keys
    • 1.g3!
      • 1...Kxf5
        • 2.Qf4#
      • 1...exf5
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR1(B)
      • Refutation
        • P(b);XS(C)
    • Try
      • R(D);
      • Vars
        • P(b);SBLOCK,XS(C)::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(B);
      • Threat
        • QAR(B)+S(C)
      • Vars
        • K(a);P-FLIGHT::S(C)
      • Refutation
        • P(b);P_SPINP(b),XS(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(D)
        • K(a);S_FLIGHT::R(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • P(A);
    • Vars
      • K(a);P-FLIGHT,XS(C)::QAR1(B)
      • P(b);OGATEB,SBLOCK,XS(C)::QAR2(B)
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