MESON Chess Problem Database

Problem Display
PID: 160471 (8/5p2/2Q3pN/1B1Pr3/1p1rk1nR/6B1/3PN1Kn/1b6 w - - 0 1)

Rice, John Michael

British Chess Magazine, 2009

8/5p2/2Q3pN/1B1Pr3/1p1rk1nR/6B1/3PN1Kn/1b6

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Qxc4#
    • 1...Sf1
      • 2.Rxg4#
    • 1...Sf3
      • 2.Rxg4#
    • 1...b3
      • 2.Sc3#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Qxe5#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Rdxd5
        • 2.Qf4#
      • 1...Rexd5
        • 2.Qf4#
      • 1...Rf5
        • 2.Qxd4#
      • 1...Rg5
        • 2.Qxd4#
      • 1...Rh5
        • 2.Qxd4#
      • 1...Re6
        • 2.Qxd4#
      • 1...Re7
        • 2.Qxd4#
      • 1...Re8
        • 2.Qxd4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Rc4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxd4#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Rxd2
        • 2.Qxe5#
      • 1...Rdxd5
        • 2.Qe3#
      • 1...Rexd5
        • 2.Qe3#
      • 1...bxc3
        • 2.Sxc3#
      • 1...Rd3
        • 2.Qxe5#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Sf3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(d);OGATEB::QAR2(H),XR(d)
    • S(b);N_GUARD::R(E),XS(f)
    • P(c);N_GUARD::S(B)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAR1(H),XR(g)
      • Vars
        • K(e);N_SPINS(f),OGATEB,S_FLIGHT,XP(G)::QAB1(H)
        • R(d);SBLOCK,XP(G)::QAR1(H)
        • R(g);SBLOCK,XP(G)::QAR1(H)
        • R(g);OGATE::QAR1(H),XR(d)
        • S(b);N_GUARD::QAB1(H),XS(b)
      • Refutation
        • R(d);
  • Actual
    • Q(H);
    • Threat
      • QAR1(H),XR(d)
    • Vars
      • K(e);N_SPINS(f),OGATEB,S_FLIGHT,XP(G)::QAB1(H)
      • R(d);OGATE,P_PINS(B),XP(A)::QAR1(H),XR(g)
      • R(d);SBLOCK,XP(G)::QAR1(H)
      • R(g);SBLOCK,XP(G)::QAR1(H)
      • P(c);XQ(H)::S(B),XP(c)
      • R(d);OGATE::QAR1(H),XR(g)
      • R(d);OGATEB::QAR2(H),XR(d)
      • S(b);N_GUARD::QAB1(H),XS(b)
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