MESON Chess Problem Database

Problem Display
PID: 87733 (5B2/3K4/6p1/3PRPp1/1n1kB3/1P1PR1Q1/6P1/1N6 w - - 0 1)

Popov, Valery

The Problemist, 1992

5B2/3K4/6p1/3PRPp1/1n1kB3/1P1PR1Q1/6P1/1N6

#2

12 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd3
      • 2.Rxd3#
    • 1...Sxd5
      • 2.Rxd5#
  • Tries
    • 1.Bf3?
      • threat
        • 2.Qg4#
      • 1...Sxd3
        • 2.R3e4#
      • 1...Sxd5
        • 2.R5e4#
      • 1...g4
        • 2.Qf4#
        • 2.Qxg4#
      • 1...gxf5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Bf3#
      • 1...Kxe3
        • 2.Bc5#
      • 1...Kxe5
        • 2.Bg7#
      • 1...Sxd3
        • 2.Bxd3#
      • 1...Sxd5
        • 2.Bxd5#
      • 1...gxf5
        • 2.Bxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE,XP(D)::R1(E),XS(a)
    • S(a);OGATE,XP(H)::R1(I),XS(a)
  • Tries
    • Try
      • B(G);
      • Threat
        • QAR(F)
      • Vars
        • S(a);SBLOCK,XP(D)::R1(E)
        • S(a);SBLOCK,XP(H)::R1(I)
      • Refutation
        • P(d);XP(J)
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+B(G)
    • Vars
      • K(b);S_FLIGHT,XR(E)::B(L)
      • K(b);OGATEB,S_FLIGHT,XR(I)::B(L)
      • S(a);OGATE,XP(D)::QAR(F)+B(G),XS(a)
      • S(a);OGATE,XP(H)::QAR(F)+B(G),XS(a)
      • P(d);OGATE,XP(J)::QAR(F)+B(G),XP(d)
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