MESON Chess Problem Database

Problem Display
PID: 96512 (8/8/3R1N2/K1PP2p1/4NnR1/3kB1P1/3P1P2/3Q4 w - - 0 1)

Lider, Valentin Viktorovich

US Problem Bulletin, 1988

8/8/3R1N2/K1PP2p1/4NnR1/3kB1P1/3P1P2/3Q4

#2

12 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qc2#
  • Tries
    • 1.Sc3?
      • 1...Sxd5
        • 2.Rd4#
        • 2.Rxd5#
        • 2.Qb1#
      • 1...Sg2
        • 2.Rd4#
        • 2.Qb1#
      • 1...Se2
        • 2.Qb1#
      • 1...Sh3
        • 2.Rd4#
        • 2.Qb1#
      • 1...Sh5
        • 2.Rd4#
        • 2.Qb1#
      • 1...Se6
        • 2.Qb1#
        • 2.dxe6#
      • 1...Sg6
        • 2.Rd4#
        • 2.Qb1#
      • 1...Kc4!
    • 1.Qb1+?
      • 1...Kc4
        • 2.Qc2#
        • 2.Qb5#
      • 1...Ke2!
    • 1.f3?
      • 1...Kc4
        • 2.Qc2#
      • 1...Sxd5
        • 2.Sf2#
      • 1...Sg2
        • 2.Sf2#
      • 1...Se2
        • 2.Sf2#
      • 1...Sh5
        • 2.Sf2#
      • 1...Se6
        • 2.Sf2#
      • 1...Sg6
        • 2.Sf2#
      • 1...Sh3!
    • 1.gxf4?
      • 1...Kc4
        • 2.Qc2#
        • 2.d3#
      • 1...gxf4!
    • 1.c6?
      • 1...Kc4
        • 2.Qc2#
      • 1...Sxd5
        • 2.Sc5#
      • 1...Sg2
        • 2.Sc5#
      • 1...Se2
        • 2.Sc5#
      • 1...Sh3
        • 2.Sc5#
      • 1...Sh5
        • 2.Sc5#
      • 1...Sg6
        • 2.Sc5#
      • 1...Se6!
  • Keys
    • 1.Sxg5!
      • 1...Kc4
        • 2.Qc2#
      • 1...Sxd5
        • 2.Rd4#
        • 2.Rxd5#
      • 1...Sg2
        • 2.Rd4#
      • 1...Se2
        • 2.Qb1#
      • 1...Sh3
        • 2.Rd4#
      • 1...Sh5
        • 2.Rd4#
      • 1...Se6
        • 2.dxe6#
      • 1...Sg6
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(A)
  • Tries
    • Try
      • S(F);
      • Vars
        • S(b);::QAB(A)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
        • S(b);P_SPINS(b),XP(J)::S(F)
        • S(b);::S(F)
      • Refutation
        • S(b);
    • Try
      • P(E);XS(b)
      • Refutation
        • P(c);XP(E)
    • Try
      • P(I);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
        • S(b);P_SPINS(b),XP(J)::S(F)
        • S(b);::S(F)
      • Refutation
        • S(b);
  • Actual
    • S(F);XP(c)
    • Vars
      • K(a);P_SPINS(b),S_FLIGHT::QAR2(A)
      • S(b);OGATE::R1(G)
      • S(b);SBLOCK::QAB(A)
      • S(b);OGATE::R(K)+P(J),XS(b)
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