MESON Chess Problem Database

Problem Display
PID: 180307 (8/8/2N1Q1P1/1pP2P2/1P1Pn1B1/3Nk1PR/8/3R2K1 w - - 0 1)

Lider, Valentin Viktorovich

Scacchi e Scienze Applicate, 1989

8/8/2N1Q1P1/1pP2P2/1P1Pn1B1/3Nk1PR/8/3R2K1

#2

13 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qb3?
      • 1...Sxg3
        • 2.Qe6#
      • 1...Sxc5
        • 2.Sxc5#
      • 1...Sd2
        • 2.Re1#
      • 1...Sf2
        • 2.Sxf2#
      • 1...Sg5
        • 2.Sf2#
      • 1...Sd6
        • 2.Sf2#
      • 1...Sf6
        • 2.Sf2#
      • 1...Sc3!
  • Keys
    • 1.Sde5!
      • threat
        • 2.Rd3#
      • 1...Sxg3
        • 2.Sd3#
      • 1...Sxc5
        • 2.Sc4#
      • 1...Sd2
        • 2.Re1#
      • 1...Sf2
        • 2.Sc4#
      • 1...Sc3
        • 2.Sc4#
      • 1...Sg5
        • 2.Sc4#
      • 1...Sd6
        • 2.Sc4#
      • 1...Sf6
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(L);N_PINS(b)
      • Vars
        • S(b);OGATEB,P_SPINS(b),XP(D)::QAR(L)
        • S(b);XP(I)::QAR(L)+S(C),XS(b)
        • S(b);SBLOCK::R(A)
        • S(b);N_GUARD::QAR(L)+S(C),XS(b)
        • S(b);N_GUARD::QAR(L)+S(C)
      • Refutation
        • S(b);
  • Actual
    • S(C);N_PINS(b)
    • Threat
      • R1(A)
    • Vars
      • S(b);P_SPINS(b),XP(D)::QAR(L)+S(C)
      • S(b);XP(I)::QAR(L)+S(C),DCHECK
      • S(b);SBLOCK::R(A)
      • S(b);::QAR(L)+S(C),DCHECK
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