MESON Chess Problem Database

Problem Display
PID: 78941 (8/1K1N4/2R1pp2/1p1k4/2nbn2q/6r1/Q5BB/3R4 w - - 0 1)

Foster, Geoffrey R

1st Prize, Koldijk MT, 2006

8/1K1N4/2R1pp2/1p1k4/2nbn2q/6r1/Q5BB/3R4

#2

7 + 9

102 Probleemblad 2007
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg2
      • 2.Sb6#
    • 1...Ra3
      • 2.Sb6#
      • 2.Rc5#
      • 2.Rd6#
    • 1...Rb3
      • 2.Rc5#
    • 1...Rc3
      • 2.Sb6#
      • 2.Rc5#
      • 2.Rd6#
    • 1...Rd3
      • 2.Rd6#
    • 1...Re3
      • 2.Sb6#
      • 2.Rc5#
      • 2.Rd6#
    • 1...Rf3
      • 2.Sb6#
    • 1...Rh3
      • 2.Sb6#
      • 2.Rc5#
      • 2.Rd6#
    • 1...Rg4
      • 2.Sb6#
      • 2.Rc5#
      • 2.Rd6#
    • 1...Rg5
      • 2.Sb6#
      • 2.Sxf6#
      • 2.Rc5#
      • 2.Rd6#
    • 1...Rg6
      • 2.Sb6#
      • 2.Rc5#
      • 2.Rd6#
    • 1...Rg7
      • 2.Rc5#
      • 2.Rd6#
    • 1...Rg8
      • 2.Sb6#
      • 2.Rc5#
      • 2.Rd6#
    • 1...b4
      • 2.Qxc4#
    • 1...e5
      • 2.Sb6#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Rc5#
        • 2.Rd6#
      • 1...Rxg2
        • 2.Sb6#
      • 1...Rb3
        • 2.Rc5#
      • 1...Rd3
        • 2.Rd6#
      • 1...Rf3
        • 2.Sb6#
      • 1...e5
        • 2.Sb6#
        • 2.Rd6#
      • 1...Qf4+!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qxb5#
      • 1...Rxg2
        • 2.Sb6#
      • 1...Rxb3
        • 2.Rc5#
      • 1...Rd3
        • 2.Rd6#
      • 1...Rf3
        • 2.Sb6#
      • 1...b4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(a);XB(C)::S(G)
    • R(a);N_SPINS(b),P_SPINS(d)::R1(E)
    • R(a);N_SPINB(c)::R1(E)
    • R(a);::S(G)
    • P(f);N_GUARD::QAB1(B),XS(b)
    • P(h);SBLOCK::S(G)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XB(C)::S(G)
        • R(a);N_SPINS(b),P_SPINS(d)::R1(E)
        • R(a);N_SPINB(c)::R1(E)
        • R(a);::S(G)
      • Refutation
        • Q(e);CHECK
  • Actual
    • Q(B);
    • Threat
      • QAR2(B),XP(f)
    • Vars
      • R(a);XB(C)::S(G)
      • R(a);N_SPINS(b),P_SPINS(d),XQ(B)::R1(E)
      • R(a);N_SPINB(c)::R1(E)
      • R(a);::S(G)
      • P(f);N_GUARD::QAB1(B),XS(b)
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