MESON Chess Problem Database

Problem Display
PID: 216409 (8/4RQ2/2p5/2B4B/Np2N3/2Pk3K/2p1pp2/2b1qn2 w - - 0 1)

Udartsev, Valentin Filipovich

Probleemblad, 1980

8/4RQ2/2p5/2B4B/Np2N3/2Pk3K/2p1pp2/2b1qn2

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Sxf2#
    • 1...Bb2
      • 2.Sxb2#
    • 1...Bd2
      • 2.Sb2#
    • 1...Be3
      • 2.Sb2#
    • 1...Bf4
      • 2.Sb2#
    • 1...Bg5
      • 2.Sb2#
    • 1...Bh6
      • 2.Sb2#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Rd7#
      • 1...Kxd2
        • 2.Rd7#
      • 1...Qxd2
        • 2.Bg6#
      • 1...Bxd2
        • 2.Bg6#
      • 1...Sxd2
        • 2.Re3#
      • 1...Se3!
    • 1.Sxf2+?
      • 1...Kd2
        • 2.Rd7#
      • 1...Qxf2!
  • Keys
    • 1.Be3!
      • threat
        • 2.Sec5#
      • 1...Kxe3
        • 2.Qf3#
      • 1...Qxc3
        • 2.Sxf2#
      • 1...Bxe3
        • 2.Sb2#
      • 1...Sxe3
        • 2.Sac5#
      • 1...c5
        • 2.Sexc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD,SBLOCK::S(D),XP(f)
    • B(a);N_GUARD::S(C),XB(a)
    • B(a);N_GUARD::S(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • R(G)
      • Vars
        • K(g);P-FLIGHT,XS(D)::R(G)
        • Q(b);SBLOCK,XS(D)::B(F)
        • B(a);SBLOCK,XS(D)::B(F)
        • S(c);N_GUARD,SBLOCK,XS(D)::R1(G)
      • Refutation
        • S(c);
    • Try
      • S(D);CHECK,XP(f)
      • Vars
        • K(g);P-FLIGHT::R(G)
      • Refutation
        • Q(b);XS(D)
  • Actual
    • B(E);
    • Threat
      • S(D)
    • Vars
      • K(g);OGATEB,P-FLIGHT,XB(E)::QAR1(H)
      • Q(b);N_GUARD,XP(A)::S(D),XP(f)
      • B(a);N_GUARD,SBLOCK,XB(E)::S(C)
      • S(c);SBLOCK,XB(E)::S(C)
      • P(i);::S(D),XP(i)
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