MESON Chess Problem Database

Problem Display
PID: 180428 (8/1N2p3/1p1PBP1P/5R2/pk2NBQb/5RP1/3K1P2/8 w - - 0 1)

Lider, Valentin Viktorovich

Schakend Nederland, 1972

8/1N2p3/1p1PBP1P/5R2/pk2NBQb/5RP1/3K1P2/8

#2

13 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...exd6
      • 2.Bxd6#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Sa2#
      • 1...a3
        • 2.Be3#
        • 2.Be5#
        • 2.Bg5#
        • 2.Rb5#
      • 1...Ka3!
    • 1.Sg5?
      • 1...Bxg3
        • 2.Bxg3#
      • 1...Bxg5
        • 2.Bxg5#
      • 1...exd6
        • 2.Bxd6#
      • 1...a3
        • 2.Be3#
      • 1...b5
        • 2.Be5#
      • 1...exf6!
  • Keys
    • 1.Bg5!
      • 1...Bxg5+
        • 2.Sxg5#
      • 1...Bxg3
        • 2.Sxg3#
      • 1...exd6
        • 2.Sexd6#
      • 1...exf6
        • 2.Sxf6#
      • 1...a3
        • 2.Sc3#
      • 1...b5
        • 2.Sec5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(e);OGATE,XP(I)::B(F),XP(e)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(E);
      • Vars
        • B(c);OGATE,XP(D)::QAR(G)+B(F),XB(c)
        • B(c);OGATE,P_PINB(F),XS(E)::QAR(G)+B(F),XB(c)
        • P(e);OGATE,XP(I)::QAR(G)+B(F),DCHECK,XP(e)
        • P(a);SBLOCK::QAR(G)+B(F)
        • P(d);SBLOCK::QAR(G)+B(F)
      • Refutation
        • P(e);XP(K)
  • Actual
    • B(F);
    • Vars
      • B(c);CHECK,XB(F)::QAR(G)+S(E),XB(c)
      • B(c);XP(D)::QAR(G)+S(E),XB(c)
      • P(e);XP(I)::QAR(G)+S(E),XP(e)
      • P(e);XP(K)::QAR(G)+S(E),XP(e)
      • P(a);SBLOCK::QAR(G)+S(E)
      • P(d);SBLOCK::QAR(G)+S(E)
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