MESON Chess Problem Database

Problem Display
PID: 180382 (8/5p2/2N2p2/pB3p2/RnPNkp2/1Qp5/p1PBP3/K7 w - - 0 1)

Lider, Valentin Viktorovich

Sinfonie Scacchistiche, 1977

8/5p2/2N2p2/pB3p2/RnPNkp2/1Qp5/p1PBP3/K7

#2

10 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc2+
      • 2.Qxc2#
    • 1...Sd3
      • 2.cxd3#
      • 2.exd3#
    • 1...cxd2
      • 2.Qf3#
    • 1...f3
      • 2.exf3#
  • Tries
    • 1.Sf3?
      • 1...Sxc2+
        • 2.Qxc2#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...cxd2
        • 2.Sxd2#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sd5
        • 2.cxd5#
      • 1...Sa6!
    • 1.Qxc3?
      • threat
        • 2.Qf3#
      • 1...Sxc2+
        • 2.Qxc2#
      • 1...Sd3
        • 2.Qxd3#
        • 2.cxd3#
        • 2.exd3#
      • 1...f3
        • 2.Qe3#
        • 2.Qxf3#
        • 2.exf3#
      • 1...Sxc6!
  • Keys
    • 1.c5!
      • 1...Sxc2+
        • 2.Sxc2#
      • 1...Sxc6
        • 2.Sxc6#
      • 1...cxd2
        • 2.Qf3#
      • 1...Sd5
        • 2.Bd3#
      • 1...Sd3
        • 2.Bxd3#
        • 2.cxd3#
        • 2.exd3#
      • 1...Sa6
        • 2.Bd3#
      • 1...f3
        • 2.exf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);CHECK,OGATE,XP(B)::QAB(E),XS(c)
    • P(b);OGATE,XB(C)::QAB1(E)
    • P(e);OGATE::P(D),XP(e)
  • Tries
    • Try
      • S(H);
      • Vars
        • S(c);CHECK,OGATE,XP(B)::QAB(E),XS(c)
        • S(c);OGATE,XS(J)::B(I),XS(c)
        • P(b);XB(C)::S(H),XP(b)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::R(F)+P(G),XS(c)
      • Refutation
        • S(c);
    • Try
      • Q(E);XP(b)
      • Threat
        • QAB1(E)
      • Vars
        • S(c);CHECK,OGATE,XP(B)::QAB(E),XS(c)
      • Refutation
        • S(c);XS(J)
  • Actual
    • P(G);
    • Vars
      • S(c);CHECK,XP(B)::R(F)+S(H),XS(c)
      • S(c);XS(J)::R(F)+S(H),XS(c)
      • P(b);OGATE,XB(C)::QAB1(E)
      • S(c);N_GUARD::B(I)
      • P(e);OGATE::P(D),XP(e)
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