MESON Chess Problem Database

Problem Display
PID: 59067 (1b2rq2/8/R2n2R1/5k1P/3P4/r1n1p3/P6B/2Q1KN1B w - - 0 1)

Groeneveld, Cornelis

1st Prize, Problem Observer, 2005

1b2rq2/8/R2n2R1/5k1P/3P4/r1n1p3/P6B/2Q1KN1B

#2

10 + 8

136 Problem Observer 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8
      • 2.Sxe3#
    • 1...Rd8
      • 2.Sxe3#
    • 1...Se4
      • 2.Sxe3#
    • 1...Sf7
      • 2.Raf6#
    • 1...e2
      • 2.Sg3#
      • 2.Qf4#
      • 2.Qg5#
  • Tries
    • 1.Qc2+?
      • 1...Re4
        • 2.Sxe3#
      • 1...Sde4
        • 2.Sxe3#
      • 1...Sce4!
  • Keys
    • 1.Qxe3!
      • threat
        • 2.Sg3#
      • 1...Rxe3+
        • 2.Sxe3#
      • 1...Se2
        • 2.Qg5#
      • 1...Sce4
        • 2.Qf4#
      • 1...Sc4
        • 2.Rg5#
      • 1...Sde4
        • 2.Qh3#
      • 1...Sdb5
        • 2.Rg5#
      • 1...Sb7
        • 2.Rg5#
      • 1...Sf7
        • 2.Raf6#
      • 1...Sc8
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD::S(C),XP(c)
    • S(e);S_CUTR(g)::S(C),XP(c)
    • S(e);OGATE::R1(I)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(g);P_SPINR(g)::S(C),XP(c)
        • S(e);P_SPINS(e)::S(C),XP(c)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • Q(A);P_SPINQ(A),XP(c)
    • Threat
      • S(C)
    • Vars
      • R(g);CHECK,XQ(A)::S(C),XR(g)
      • S(b);N_PINQ(A)::QAR1(A)
      • S(e);::R1(J)
      • S(e);N_PINQ(A)::QAB(A)
      • S(e);OGATE::R1(I)
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