MESON Chess Problem Database

Problem Display
PID: 38167 (8/3N2p1/2r1B3/1Np1p2R/2n1kp2/2Knp3/4P1p1/Q7 w - - 0 1)

Lider, Valentin Viktorovich

1st Prize, Sredba na Solidarnosta, 1971

8/3N2p1/2r1B3/1Np1p2R/2n1kp2/2Knp3/4P1p1/Q7

#2

7 + 10

3753 FIDE Album (1971-1973) 1978

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qxc4#
      • 1...Rd6
        • 2.Sxd6#
      • 1...Sb2
        • 2.Rxe5#
      • 1...Sb4!
    • 1.Qa8?
      • threat
        • 2.Qxc6#
      • 1...Sb4
        • 2.Sxc5#
      • 1...Sa5
        • 2.Sd6#
      • 1...Sb6
        • 2.Sd6#
      • 1...f3!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qxd3#
      • 1...f3
        • 2.Rh4#
      • 1...Rd6
        • 2.Sxc5#
      • 1...Sb2
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(j);N_GUARD::S(G)
  • Tries
    • Try
      • Q(A);P_PINS(d)
      • Threat
        • QAR2(A),XS(d)
      • Vars
        • R(i);N_GUARD::S(D),XR(i)
        • S(b);N_GUARD::R1(E),XP(h)
      • Refutation
        • S(b);N_SPINS(d)
    • Try
      • Q(A);P_PINR(i)
      • Threat
        • QAB(A),XR(i)
      • Vars
        • S(b);N_GUARD::S(G),XP(g)
        • S(d);N_GUARD::S(D)
      • Refutation
        • P(f);
  • Actual
    • Q(A);P_PINS(b)
    • Threat
      • QAB1(A),XS(b)
    • Vars
      • P(f);OGATEB::R(E)
      • R(i);N_GUARD::S(G),XP(g)
      • S(d);N_GUARD::R1(E),XP(h)
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