MESON Chess Problem Database

Problem Display
PID: 110281 (7Q/5P1P/1N1P4/1R2P3/1bPP4/2k2P2/8/1K1R4 w - - 0 1)

Lider, Valentin Viktorovich

Sachove umeni (Ceskoslovensky sach), 1981

7Q/5P1P/1N1P4/1R2P3/1bPP4/2k2P2/8/1K1R4

#2

12 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb3
      • 2.Rd3#
  • Tries
    • 1.Qc8?
      • 1...Kb3
        • 2.Rd3#
      • 1...Bxd6
        • 2.Sa4#
        • 2.Sd5#
      • 1...Ba3
        • 2.Sa4#
        • 2.Sd5#
      • 1...Ba5
        • 2.Sa4#
        • 2.Sd5#
      • 1...Bc5!
    • 1.d5?
      • 1...Kb3
        • 2.Rd3#
      • 1...Bxd6
        • 2.exd6#
      • 1...Ba3
        • 2.e6#
      • 1...Ba5
        • 2.e6#
      • 1...Bc5!
    • 1.e6?
      • 1...Kb3
        • 2.Rd3#
      • 1...Ba3
        • 2.d5#
      • 1...Ba5
        • 2.d5#
      • 1...Bc5
        • 2.dxc5#
      • 1...Bxd6!
  • Keys
    • 1.Qa8!
      • 1...Kb3
        • 2.Rd3#
      • 1...Bxd6
        • 2.Qa1#
      • 1...Ba3
        • 2.Qxa3#
      • 1...Ba5
        • 2.Qxa5#
      • 1...Bc5
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINB(b)::R(B)
  • Tries
    • Try
      • Q(L);
      • Vars
        • K(a);P-FLIGHT,P_SPINB(b)::R(B)
      • Refutation
        • B(b);
    • Try
      • P(E);
      • Vars
        • K(a);P-FLIGHT,P_SPINB(b)::R(B)
        • B(b);OGATE,XP(I)::QAB(L)+P(G),XB(b)
        • B(b);::QAB(L)+P(G)
      • Refutation
        • B(b);
    • Try
      • P(G);
      • Vars
        • K(a);P-FLIGHT,P_SPINB(b)::R(B)
        • B(b);::QAB(L)+P(E)
        • B(b);OGATE::QAB(L)+P(E),XB(b)
      • Refutation
        • B(b);XP(I)
  • Actual
    • Q(L);
    • Vars
      • K(a);P-FLIGHT,P_SPINB(b)::R(B)
      • B(b);XP(I)::QAB(L)
      • B(b);N_GUARD::QAR2(L),XB(b)
      • B(b);OGATEB::QAB(L),XB(b)
      • B(b);::QAB(L)
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