MESON Chess Problem Database

Problem Display
PID: 239145 (4n1r1/4Q3/3PN1B1/K2ppP2/3Pkp1R/8/3Bn3/4Nbq1 w - - 0 1)

Erokhin, Vladimir Alekseevich

1st Comm., Sachove umeni (Ceskoslovensky sach), 1982

4n1r1/4Q3/3PN1B1/K2ppP2/3Pkp1R/8/3Bn3/4Nbq1

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Sg5#
    • 1...Sxd4
      • 2.Sc5#
    • 1...exd4
      • 2.Sxf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sc7#
      • 2.Sg7#
      • 2.Sd8#
      • 2.Sf8#
  • Tries
    • 1.Sg5+?
      • 1...Qxg5
        • 2.Qxe5#
      • 1...Kxd4!
    • 1.Sg7?
      • threat
        • 2.Qxe5#
      • 1...Qxd4
        • 2.f6#
      • 1...Sxd4
        • 2.Rxf4#
      • 1...Kxd4!
    • 1.Qf6?
      • threat
        • 2.Qxe5#
      • 1...Qxd4
        • 2.Sg5#
      • 1...Sxd4
        • 2.Sc5#
      • 1...exd4
        • 2.Sc5#
      • 1...Sxf6!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Qxe5#
      • 1...Kxd4
        • 2.Se6#
      • 1...Qxd4
        • 2.Sxe2#
      • 1...Sxd4
        • 2.Sfg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD,SBLOCK,XP(C)::S(H)
    • S(c);SBLOCK,XP(C)::S(H)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • Q(b);XS(H)::QAR1(J),XP(g)
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • S(H);
      • Threat
        • QAR1(J),XP(g)
      • Vars
        • Q(b);N_GUARD,SBLOCK,XP(C)::B(I)+P(F)
        • S(c);N_GUARD,SBLOCK,XP(C)::R1(D),XP(e)
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • Q(J);
      • Threat
        • QAR1(J),XP(g)
      • Vars
        • Q(b);N_GUARD,SBLOCK,XP(C)::S(H)
        • S(c);SBLOCK,XP(C)::S(H)
        • P(g);XP(C)::S(H)
      • Refutation
        • S(h);XQ(J)
  • Actual
    • S(H);P_PINP(g),XP(e)
    • Threat
      • QAR1(J),XP(g)
    • Vars
      • K(d);N_SPINP(g),P-FLIGHT,XP(C)::R(D)+S(H),DCHECK
      • Q(b);N_GUARD,XP(C)::R(D)+S(H),XS(c)
      • S(c);N_GUARD,SBLOCK,XP(C)::R(D)+S(H)
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