MESON Chess Problem Database

Problem Display
PID: 7858 (8/1n3rp1/K1R3nb/p2k4/1pRN2N1/3P4/1Q6/4r3 w - - 0 1)

Barnes, Barry Peter

1st Comm., Oxford, 1994

8/1n3rp1/K1R3nb/p2k4/1pRN2N1/3P4/1Q6/4r3

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5+
      • 2.R4xc5#
    • 1...Sd6
      • 2.R4c5#
      • 2.R6c5#
    • 1...Sd8
      • 2.R4c5#
  • Tries
    • 1.Se2?
      • threat
        • 2.Qd4#
      • 1...Sc5+
        • 2.R4xc5#
      • 1...Rf4
        • 2.Se3#
      • 1...Be3
        • 2.Sxe3#
      • 1...Sd6!
    • 1.Sb5?
      • threat
        • 2.Qd4#
      • 1...Sc5+
        • 2.R4xc5#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Rf4
        • 2.Sc7#
      • 1...Re4
        • 2.dxe4#
      • 1...Be3!
    • 1.Qg2+?
      • 1...Re4
        • 2.Qxe4#
        • 2.dxe4#
      • 1...Rf3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qd4#
      • 1...Sc5+
        • 2.R4xc5#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Re4
        • 2.dxe4#
      • 1...Be3
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(g);CHECK,N_GUARD::R1(C),XS(g)
    • S(g);N_GUARD::R1(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(A)
      • Vars
        • S(g);CHECK,N_GUARD::R1(C),XS(g)
        • R(h);S_CUTB(f)::S(E)
        • B(f);N_GUARD::S(E),XB(f)
      • Refutation
        • S(g);
    • Try
      • S(D);
      • Threat
        • QAR1(A)
      • Vars
        • S(g);CHECK,N_GUARD::R1(C),XS(g)
        • S(g);N_GUARD::R1(G),XS(g)
        • R(h);N_GUARD::S(D)
        • R(a);OGATE::P(B),XR(a)
      • Refutation
        • B(f);
    • Try
      • Q(A);CHECK
      • Refutation
        • R(h);P_SPINR(h)
  • Actual
    • S(D);
    • Threat
      • QAR1(A)
    • Vars
      • S(g);CHECK,N_GUARD::R1(C),XS(g)
      • S(g);N_GUARD::R1(G),XS(g)
      • R(a);OGATE::P(B),XR(a)
      • B(f);S_CUTR(a)::QAB(A)
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