MESON Chess Problem Database

Problem Display
PID: 7634 (8/8/p3r1p1/K2N1b1r/8/1Q1P3n/3Pk2N/2B2R2 w - - 0 1)

Rychkov, Vladimir Nikolaevich

1st Prize, Moscow Ty., 1991-1992

8/8/p3r1p1/K2N1b1r/8/1Q1P3n/3Pk2N/2B2R2

#2

8 + 7

3705 Album Russia (1992-1994) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd3
      • 2.Qd1#
    • 1...Sg1
      • 2.Sf4#
    • 1...Sf2
      • 2.Sf4#
    • 1...Sf4
      • 2.Sxf4#
    • 1...Sg5
      • 2.Sf4#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Sc3#
      • 1...Bxd3
        • 2.Qg4#
      • 1...Be4
        • 2.dxe4#
      • 1...Bg4
        • 2.d4#
      • 1...Re5!
  • Keys
    • 1.d4!
      • threat
        • 2.Qf3#
      • 1...Re3
        • 2.Qxe3#
      • 1...Bd3
        • 2.Qd1#
      • 1...Be4
        • 2.Qe3#
      • 1...Bg4
        • 2.Qc4#
      • 1...Sg1
        • 2.Sf4#
      • 1...Sg5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(c);P_PINS(H),SBLOCK,XP(F)::QAB1(E)
    • S(b);N_GUARD::S(H)
    • S(b);N_GUARD::S(H),XS(b)
  • Tries
    • Try
      • Q(E);
      • Threat
        • S(H)
      • Vars
        • B(c);N_GUARD,P_PINS(H),P_SPINB(c),SBLOCK,XP(F)::QAB(E)
        • B(c);OGATE,P_PINS(H)::QAB(E)+P(F),XB(c)
        • B(c);N_GUARD,P_PINS(H)::QAB(E)+P(F)
      • Refutation
        • R(f);P_PINS(H)
  • Actual
    • P(F);
    • Threat
      • QAB1(E)
    • Vars
      • R(f);N_GUARD::QAR1(E),XR(f)
      • B(c);P_PINS(H),SBLOCK::QAB1(E)
      • B(c);P_PINS(H),S_CUTR(f)::QAR1(E)
      • B(c);N_GUARD,P_PINS(H)::QAB(E)
      • S(b);N_GUARD::S(H)
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