MESON Chess Problem Database

Problem Display
PID: 180490 (8/B2K4/3pp3/4kPP1/2P1P2Q/R6B/4n3/8 w - - 0 1)

Lider, Valentin Viktorovich

3rd HM., Bulletin of the Central Chess Club of USSR, 1978

8/B2K4/3pp3/4kPP1/2P1P2Q/R6B/4n3/8

#2

9 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rd3?
      • 1...exf5
        • 2.Rd5#
      • 1...d5
        • 2.Bb8#
      • 1...Sc1
        • 2.Bd4#
      • 1...Sg1
        • 2.Bd4#
      • 1...Sc3
        • 2.Bd4#
      • 1...Sg3
        • 2.Bd4#
      • 1...Sd4
        • 2.Bxd4#
      • 1...Sf4!
    • 1.Rf3?
      • 1...exf5
        • 2.Rxf5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sc1
        • 2.Qf4#
      • 1...Sg1
        • 2.Qf4#
      • 1...Sc3
        • 2.Qf4#
      • 1...Sg3
        • 2.Qf4#
      • 1...Sd4
        • 2.Qf4#
      • 1...d5!
  • Keys
    • 1.Re3!
      • 1...exf5
        • 2.exf5#
      • 1...d5
        • 2.exd5#
      • 1...Sc1
        • 2.Qg3#
      • 1...Sg1
        • 2.Qg3#
      • 1...Sc3
        • 2.Qg3#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sd4
        • 2.Qg3#
      • 1...Sf4
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Vars
        • P(d);N_GUARD,XP(F)::R1(A)
        • P(c);OGATEB::B(H)
        • S(a);N_GUARD::B(H)
        • S(a);N_GUARD::B(H),XS(a)
      • Refutation
        • S(a);
    • Try
      • R(A);
      • Vars
        • P(d);OGATE,XP(F)::R1(A),XP(d)
        • S(a);N_GUARD::QAB1(E),XS(a)
        • S(a);N_GUARD::QAB1(E)
      • Refutation
        • P(c);
  • Actual
    • R(A);
    • Vars
      • P(d);OGATE,XP(F)::R(A)+P(D),XP(d)
      • P(c);OGATE::R(A)+P(D),XP(c)
      • S(a);N_GUARD::QAB(E)
      • S(a);N_GUARD::QAB(E),XS(a)
      • S(a);SBLOCK::QAB(E)
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