MESON Chess Problem Database

Problem Display
PID: 61199 (4R3/b1B2p2/4r1p1/3k1P2/7P/n1QppNKB/8/8 w - - 0 1)

Lukyanov, Valentin Volodimirovich

Uralski Problemist, 2004

4R3/b1B2p2/4r1p1/3k1P2/7P/n1QppNKB/8/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qc6#
    • 1...Re4
      • 2.Rd8#
    • 1...Re5
      • 2.Rxe5#
    • 1...Ra6
      • 2.Re5#
    • 1...Rb6
      • 2.Re5#
    • 1...Rc6
      • 2.Re5#
    • 1...Rd6
      • 2.Re5#
    • 1...Rf6
      • 2.Re5#
  • Tries
    • 1.Bg2?
      • threat
        • 2.Se5#
      • 1...Ke4
        • 2.Sd4#
      • 1...Re4
        • 2.Rd8#
      • 1...Re5
        • 2.Sxe5#
        • 2.Rxe5#
      • 1...Sc4!
    • 1.Rd8+?
      • 1...Ke4
        • 2.Sg5#
        • 2.Qxd3#
      • 1...Rd6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Bg2#
      • 1...Ke4
        • 2.Qxd3#
      • 1...Rxe5
        • 2.Rxe5#
      • 1...Sc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • K(d);P_SPINR(e),S_FLIGHT::QAB(A)
    • R(e);N_GUARD,SBLOCK::R(H)
    • R(e);OGATE::R1(H),XR(e)
    • R(e);OGATE::R1(H)
  • Tries
    • Try
      • B(D);
      • Threat
        • B(D)+S(B)
      • Vars
        • K(d);P_SPINR(e),S_FLIGHT::B(D)+S(B)
        • R(e);N_GUARD,SBLOCK::R(H)
      • Refutation
        • S(a);
    • Try
      • R(H);CHECK
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • S(B);
    • Threat
      • B(D)
    • Vars
      • K(d);S_FLIGHT::QAB1(A),XP(b)
      • R(e);OGATE,XS(B)::R1(H),XR(e)
      • S(a);N_GUARD::QAB1(A),XS(a)
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