MESON Chess Problem Database

Problem Display
PID: 180537 (1K3B2/pP6/p1P1kp1N/1n3p2/QN3P2/pRp5/P7/8 w - - 0 1)

Lider, Valentin Viktorovich

Revista Romana de Sah, 1987

1K3B2/pP6/p1P1kp1N/1n3p2/QN3P2/pRp5/P7/8

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Re3#
  • Tries
    • 1.Sxa6?
      • threat
        • 2.Qc4#
      • 1...Sd6
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Kd5!
    • 1.Qxa6?
      • 1...Sd4
        • 2.Qc4#
      • 1...Sc7
        • 2.Qe2#
      • 1...c2
        • 2.Re3#
      • 1...Sd6!
    • 1.c7?
      • threat
        • 2.c8Q#
        • 2.c8B#
      • 1...Kd7
        • 2.c8Q#
      • 1...Sxc7
        • 2.Qc6#
      • 1...Sd4
        • 2.Qe8#
        • 2.c8Q#
        • 2.c8B#
      • 1...c2
        • 2.c8Q#
        • 2.c8B#
      • 1...a5
        • 2.c8Q#
        • 2.c8B#
      • 1...Sd6!
  • Keys
    • 1.Qa5!
      • 1...Sd4
        • 2.Qd5#
      • 1...Sd6
        • 2.Qd5#
      • 1...Sc7
        • 2.Qxf5#
      • 1...c2
        • 2.Re3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE::R(B)
  • Tries
    • Try
      • S(D);XP(e)
      • Threat
        • QAB(C)
      • Vars
        • S(c);N_GUARD::S(D)
        • S(c);N_GUARD::S(D),XS(c)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(C);XP(e)
      • Vars
        • S(c);OGATE::QAB(C)
        • S(c);OGATE::QAR(C)
        • P(b);OGATE::R(B)
      • Refutation
        • S(c);
    • Try
      • P(F);
      • Threat
        • P=Q
      • Vars
        • K(f);P_SPINS(c),S_FLIGHT::P=Q
        • S(c);OGATE,XP(F)::QAR2(C)
        • P(b);::P=Q
        • P(e);::P=Q
      • Refutation
        • S(c);
  • Actual
    • Q(C);
    • Vars
      • S(c);OGATE::QAB1(C)
      • S(c);OGATE::QAB1(C),XP(d)
      • P(b);OGATE::R(B)
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